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The viscoelastic mechanical property and constitutive models of 3D printed photopolymer Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-14 Dan Wang; Kun Wu; Guanlin Li; Lifeng Wang
Purpose The purpose of this paper is to study the mechanical property of three-dimensional (3D) Printed photopolymer (Vero Yellow and Tango Black) with different constant strain rate. According to the experimental results, three constitutive models are used to describe the stress-strain and stress-time relation in the tension and stress relaxation process. Design/methodology/approach The Stratasys
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Effect of process route on powder three-dimensional-printing of metal powders Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-13 Ifeanyichukwu Donald Olumor; Lee Geuntak; Eugene Olevsky
Purpose The purpose of this study is to investigate the effect of two unique processing routes (solvent jetting (SJ) and binder jetting (BJ)), on the green density of printed stainless steel 316L (SS316L) and Nickel (Ni) powders. Design/methodology/approach In the SJ processing route, a solvent is jetted unto the powder/binder mixture to selectively activate the binder, layer by layer. In the BJ processing
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Porosity in multi-axis material extrusion of short-fibre composites Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-11 Nathaniel Kaill; Robert Campbell; Patrick Pradel
Purpose This study aims to investigate the relationship between part porosity and mechanical properties of short-fibre reinforced polylactic acid printed via multi-axis material extrusion (MAMEX) to establish guidelines for optimal process configurations. Design/methodology/approach Material properties graphs provide the basis for studying the relationship between porosity and mechanical behaviour
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Multi-scale damage analysis and fatigue behavior of PLA manufactured by fused deposition modeling (FDM) Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-11 Hamid Reza Vanaei; Mohammadali Shirinbayan; Saeedeh Vanaei; Joseph Fitoussi; Sofiane Khelladi; Abbas Tcharkhtchi
Purpose Fused deposition modeling (FDM) draws particular attention due to its ability to fabricate components directly from a CAD data; however, the mechanical properties of the produced pieces are limited. This paper aims to present the experimental aspect of multi-scale damage analysis and fatigue behavior of polylactic acid (PLA) manufactured by FDM. The main purpose of this paper is to analyze
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Mapping the path to certification of metal laser powder bed fusion for aerospace applications Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-11 Duncan William Gibbons; Jean-Pierre Louis Serfontein; André Francois van der Merwe
Purpose The purpose of this paper is to identify and define the certification lifecycle of laser powder bed fusion for aerospace applications from equipment acquisition and installation to production, part acceptance and continuous improvement activities. Design/methodology/approach A top–down systems engineering approach is performed consisting of concept development, requirements engineering and
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A finned-riser design to avoid the capillarity effect in multi-jet fusion technology Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-12 Mattia Mele; Giampaolo Campana; Gian Luca Monti
Purpose Multi-jet fusion (MJF) process is based on a polymeric powder bed that is heated and irradiated by infra-red lamps. The layer under construction is jetted with inks to provide the desired heat management conditions for selective melting. Depending on several process variables, manufactured parts can exhibit lifting of the borders of the top surface of the shape under construction. This phenomenon
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Research on porous titanium implants and its animal experiments Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-09 Chunyan Yao; Dongdong Chen; Zhongli Zheng; Qiangsheng Wang; Kaijie Fu
Purpose The purpose of this study is to obtain an effective implant with porous structures on its surface, named porous-surfaced implant, which helps to improve the overall stability of the implant and promote the combination of implant and alveolar bone. Design/methodology/approach Porous-surfaced implants with a porosity of 16%, 21%and 32% were designed and the effect of porosity on the strength
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Investigation of the effect of torch tilt and external magnetic field on arc during overlapping deposition of wire arc additive manufacturing Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-12 Xiangman Zhou; Qihua Tian; Yixian Du; Yancheng Zhang; Xingwang Bai; Yicha Zhang; Haiou Zhang; Congyang Zhang; Youlu Yuan
Purpose The purpose of this paper is to find a theoretical reference to adjust the unsymmetrical arc shape and plasma flow of overlapping deposition in wire arc additive manufacturing (WAAM) and ensure the effect of the gas shielding and stable heat and mass transfer in deposition process. The multiphysical numerical simulation and physical experiment are used for validation. Design/methodology/approach
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Cellulose nanocrystals reinforced shape memory polymer cardiovascular stent Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Yu Chen; Irina Tatiana Garces; Tian Tang; Cagri Ayranci
Purpose The purpose of this paper is to demonstrate an innovative, fast and low-cost method to fabricate customized stents using polyurethane-based shape memory polymers composite reinforced by cellulose nanocrystal (CNC), achieved by a commercial desktop extrusion-based additive manufacturing (EBAM) device. Design/methodology/approach The composite filament for printing the stents was prepared by
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Effect of steam autoclaving on laser sintered polyamide 12 Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-13 James Robert Wingham; Maha Omran; Joanna Shepherd; Candice Majewski
Purpose The use of laser sintering (LS) in the medical sector has increased dramatically in recent years. With the move towards direct use of these parts in clinical applications, there is a greater need to understand the effects of standard processes on the part properties. The purpose of this study is to determine the effect that steam sterilisation has on the mechanical properties of LS polyamide
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Powder characterization and part density for powder bed fusion of 17-4 PH stainless steel Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Sean Daniel Dobson; Thomas Louis Starr
Purpose Characteristics of the metal powder are a key factor in the success of powder bed fusion (PBF) additive manufacturing. Powders for PBF from different manufacturers may have a different particle size and/or bulk packing and flow behavior. Powder properties change as the powder is reused for multiple builds. This study seeks to measure the variability of commercial 17-4 PH stainless steel powders
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Surface finishing of additively manufactured stainless steel surgical instruments Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-04 Alasdair Soja; Jun Li; Seamus Tredinnick; Tim Woodfield
Purpose Additive manufacturing (AM) has the potential to revolutionise the fabrication of complex surgical instruments. However, AM parts typically have a higher surface roughness compared to machined or fine cast parts. High surface roughness has important implications for surgical instruments, particularly in terms of cleanliness and aesthetic considerations. In this study, bulk surface finishing
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Influence of laser parameters and Ti content on the surface morphology of L-PBF fabricated Titania Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-13 Abid Ullah; HengAn Wu; Asif Ur Rehman; YinBo Zhu; Tingting Liu; Kai Zhang
Purpose The purpose of this paper is to eliminate Part defects and enrich additive manufacturing of ceramics. Laser powder bed fusion (L-PBF) experiments were carried to investigate the effects of laser parameters and selective oxidation of Titanium (mixed with TiO2) on the microstructure, surface quality and melting state of Titania. The causes of several L-PBF parts defects were thoroughly analyzed
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Digital fabrication of removable partial dentures made of titanium alloy and zirconium silicate micro-ceramic using a combination of additive and subtractive manufacturing technologies Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-19 Yan Zhang; Kai Li; Hai Yu; Jiang Wu; Bo Gao
Purpose This paper aims to present a new design for removable partial dentures (RPDs) for partially edentulous patients to improve the efficiency and quality of RPD manufacturing. Additive and subtractive manufacturing technologies and zirconium silicate micro-ceramic bonding in the aesthetic zone are used herein. Design/methodology/approach A case was presented. First, RPD digital definitive casts
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Region-based layered infill area generation of STL models for additive manufacturing Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-09 Nan Zhang; Lichao Zhang; Senlin Wang; Shifeng Wen; Yusheng Shi
Purpose In the implementation of large-size additive manufacturing (AM), the large printing area can be established by using the tiled and fixed multiple printing heads or the single dynamic printing head moving in the x–y plane, which requires a layer decomposition after the mesh slicing to generate segmented infill areas. The data processing flow of these schemes is redundant and inefficient to some
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Effect of build orientation on fracture behaviour of AlSi10Mg produced by selective laser melting Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-09 Sultan AlRedha; Anton Shterenlikht; Mahmoud Mostafavi; Derreck Van Gelderen; Omar Eduardo Lopez-Botello; Luis Arturo Reyes; Patricia Zambrano; Carlos Garza
Purpose A key challenge found in additive manufacturing is the difficulty to produce components with replicable microstructure and mechanical performance in distinct orientations. This study aims to investigate the influence of build orientation on the fracture toughness of additively manufactured AlSi10Mg specimens. Design/methodology/approach The AlSi10Mg specimens were manufactured using the selective
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Using simple estimates for the flexural stiffness of thick FDM beams based on sandwich beam models Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-23 Alejandro Tapia Córdoba; Daniel García Vallejo; Pablo Millán Gata; Jaime Domínguez Abascal
Purpose The incipient growth of the fused deposition modeling (FDM) techniques encourages the development of models to predict the behavior of these parts involving complicated and heterogeneous geometries whose behavior strongly diverges from the continuous model hypothesis. This paper aims to address the problem of predicting the flexural properties of FDM parts building on the geometrical similarity
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Using additive manufactured parametric models for wind tunnel test-based aerodynamic shape optimization Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-23 Hyoung Seog Chung; Seung Pil Kim; Younseok Choi
Purpose The purpose of this paper is to propose a new approach of using additively manufactured parametric models in the wind tunnel test-based aerodynamic shape optimization (ASO) framework and to present its applicability test results obtained from a realistic aircraft design problem. Design/methodology/approach For aircraft shape optimization, the following three methodologies were used. First,
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Colourful fused filament fabrication method based on transitioning waste infilling technology with a colour surface model Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-01 Zizhao Wang; Hongyao Shen; Senyang Wu; Jianzhong Fu
Purpose Fused filament fabrication (FFF) is a common additive manufacturing method that is widely used owing to its low cost, environmental friendliness and safety. Colour models are needed because of their ability to express more information, but high printing quality and efficiency are difficult to achieve with the existing FFF colour printing methods because of the “inertia” of printing. Inertia
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Parametric optimization of fused deposition modelling process using Grey based Taguchi and TOPSIS methods for an automotive component Rapid Prototyping J. (IF 3.099) Pub Date : 2020-11-25 Sakthivel Murugan R.; Vinodh S.
Purpose This paper aims to optimize the process parameters of the fused deposition modelling (FDM) process using the Grey-based Taguchi method and the results to be verified based on a technique for order preference by similarity to ideal solution (TOPSIS) and analytical hierarchy process (AHP) calculation. Design/methodology/approach The optimization of process parameters is gaining a potential role
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Statistical models for the mechanical properties of 3D printed external medical aids Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Rafael Moreno; Diego Carou; Daniel Carazo-Álvarez; Munish Kumar Gupta
Purpose 3D printing is gaining attention in the medical sector for the development of customized solutions for a wide range of applications such as temporary external implants. The materials used for the manufacturing process are critical, as they must provide biocompatibility and adequate mechanical properties. This study aims to evaluate and model the influence of the printing parameters on the mechanical
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The influence of the MEX manufacturing parameters on the tensile elastic response of printed elements Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Jakub Bryła
Purpose This paper aims to investigate the influence of the manufacturing stages on three-dimensionally printed elements via material extrusion (MEX). Design/methodology/approach Three factors were identified: the printer, slicer and filament. The impact of each of them was considered by analysing the results from tensile tests, performed on the printed specimens. Using the Prusa MK3S and Anet A6 printers
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Computational and experimental study of lattice structured patterns for casting process Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Ablyaz Timur Rizovich; Muratov Karim Ravilevich; Алексей Aleksey Шумков; Evgeniy Shlykov; Sahil Dhiman; Sarabjeet Singh Sidhu
Purpose The quality of lost foam casted engineering components is directly influenced by the characteristics of the respective ceramic shell mold (CSM) and hence casting pattern. In this present work, rapid prototyping (RP) was used to fabricate the lattice structured patterns (LSPs) to reduce the defects and cracks in CSM during the heating stage. Design/methodology/approach The quality of the LSPs
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Experimental and computational analysis of mechanical properties of RGD840 material manufactured through PolyJet process Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Nagendra Kumar Maurya; Vikas Rastogi; Pushpendra Singh
Purpose Nowadays, the PolyJet technique is used to fabricate low volume functional parts in engineering and biomedical applications. However, the mechanical properties of the components fabricated through this process are inferior in comparison to components fabricated through the traditional manufacturing process. This paper aims to attempt to investigate the influence of process parameters, i.e.
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Multi-tissue layering and path planning of in situ bioprinting for complex skin and soft tissue defects Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-04 Huichao Wang; Qin Lian; Dichen Li; Chenghong Li; Tingze Zhao; Jin Liang
Purpose Reconstructing multi-layer tissue structure using cell printing to repairing complex tissue defect is a challenging task, especially using in situ bioprinting. This study aims to propose a method of in situ bioprinting multi-tissue layering and path planning for complex skin and soft tissue defects. Design/methodology/approach The scanned three-dimensional (3D) point cloud of the skin and soft
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A novel method of bead modeling and control for wire and arc additive manufacturing Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-04 Shangyong Tang; Guilan Wang; Hao Song; Runsheng Li; Haiou Zhang
Purpose Modeling and control of bead geometry in wire and arc additive manufacturing is significant as it affects the whole manufacturing process. The purpose of this paper is to establish an efficient model to control the bead geometry with fewer experiments in wire and arc additive manufacturing (WAAM). Design/methodology/approach A multi-sensor system is established to monitor the process parameters
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Research on GMAW based non-supporting thin-wall structure manufacturing Rapid Prototyping J. (IF 3.099) Pub Date : 2021-01-04 Bing Liu; Hongyao Shen; Rongxin Deng; Zeyu Zhou; Jia’ao Jin; Jianzhong Fu
Purpose Additive manufacturing based on arc welding is a fast and effective way to fabricate complex and irregular metal workpieces. Thin-wall metal structures are widely used in the industry. However, it is difficult to realize support-free freeform thin-wall structures. This paper aims to propose a new method of non-supporting thin-wall structure (NSTWS) manufacturing by gas metal arc welding (GMAW)
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Influence of machine type and consecutive closed-loop recycling on macroscopic properties for fused filament fabrication of acrylonitrile-butadiene-styrene parts Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-28 Pierandrea Dal Fabbro; Andrea La Gala; Willem Van De Steene; Dagmar R. D’hooge; Giovanni Lucchetta; Ludwig Cardon; Rudinei Fiorio
Purpose This study aims to evaluate and compare the macroscopic properties of commercial acrylonitrile-butadiene-styrene (ABS) processed by two different types of additive manufacturing (AM) machines. The focus is also on the effect of multiple closed-loop recycling of ABS. Design/methodology/approach A conventional direct-drive, Cartesian-type machine and a Bowden, Delta-type machine with an infrared
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Generic design of an anatomical heart model optimized for additive manufacturing with silicone Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-18 Hannah Riedle; Ahmed Ghazy; Anna Seufert; Vera Seitz; Bernhard Dorweiler; Jörg Franke
Purpose The purpose of this study is the generation of a thorough generic heart model optimized for direct 3D printing with silicone elastomers. Design/methodology/approach The base of the model design is segmentation of CT data, followed by a generic adaption and a constructive enhancement. The model is 3D printed with silicone. An evaluation of the physical model gives indications about its benefits
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Mechanical meta-material-based polymer skin graft production by rapid prototyping and replica method Rapid Prototyping J. (IF 3.099) Pub Date : 2020-12-07 Mohamad Attar; Seher Selen Aydin; Aliye Arabaci; Ilven Mutlu
Purpose The purpose of this paper is the production of mechanical meta-material samples by rapid prototyping (RP) and replica technique for patient-specific skin graft or cranial implant applications in tissue engineering. Design/methodology/approach Positive moulds (patterns) were produced by stereolithography-based RP. Impression moulding method was used for the production of silicone products (skin
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Tailoring physico-mechanical properties and rheological behavior of ABS filaments for FDM via blending with SEBS TPE Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-07 Mozhgan Sayanjali; Amir Masood Rezadoust; Foroud Abbassi Sourki
Purpose This paper aims to focus on the development of the three-dimensional (3D) printing filaments based on acrylonitrile butadiene styrene (ABS) copolymer and styrene-ethylene/butylene-styrene (SEBS) block copolymer, with tailored viscoelastic properties and controlled flow during the 3D printing process. Design/methodology/approach In this investigation, ABS was blended with various amounts of
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Customized design and additive manufacturing of kids’ ankle foot orthosis Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-05 Harish Kumar Banga; Parveen Kalra; Rajendra M. Belokar; Rajesh Kumar
Purpose The purpose of this study is improvement of human gait by customized design of ankle foot orthosis (AFO). An has been the most frequently used orthosis in children with cerebral palsy. AFOs are designed to boost existing features or to avoid depression or traumatize muscle contractures. The advantages of AFO’s utilized for advancement in human walk attributes for the improvement in foot deformities
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Strain-rate-dependent properties of short carbon fiber-reinforced acrylonitrile-butadiene-styrene using material extrusion additive manufacturing Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-26 Wilco M.H. Verbeeten; Miriam Lorenzo-Bañuelos; Rubén Saiz-Ortiz; Rodrigo González
Purpose The purpose of the present paper is to quantify and analyze the strain-rate dependence of the yield stress for both unfilled acrylonitrile-butadiene-styrene (ABS) and short carbon fiber-reinforced ABS (CF-ABS) materials, fabricated via material extrusion additive manufacturing (ME-AM). Two distinct and opposite infill orientation angles were used to attain anisotropy effects. Design/methodology/approach
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Analysis of post-processing influence on the geometrical and dimensional accuracy of selective laser melting parts Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-12 Eduardo Cuesta; Braulio J. Alvarez; Pablo Zapico; Sara Giganto
Purpose This study aims to analyze the effect of the different common post-processes on the geometrical and dimensional accuracy of selective laser melting (SLM) parts. Design/methodology/approach An artefact has been designed including cubic features formed by planar surfaces orientated according to the machine axes, covering all the X-Y area of the working space. The artefact has been analyzed both
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500 days of Thingiverse: a longitudinal study of 30 popular things for 3D printing Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-19 James I. Novak
Purpose The purpose of this paper is to provide insight into the way object data on Thingiverse changes over time, analyzing the relationships among views, downloads, likes, makes, remixes and comments over 500 days. Design/methodology/approach In total, 30 of the most popular things on Thingiverse were tracked between August 26, 2018 and January 7, 2020, with data collected about the different interactions
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Effect of post-heat treatment cooling on microstructure and mechanical properties of selective laser melting manufactured austenitic 316L stainless steel Rapid Prototyping J. (IF 3.099) Pub Date : 2020-09-28 Saad Waqar; Jiangwei Liu; Qidong Sun; Kai Guo; Jie Sun
Purpose This paper aims to investigate the influence of different post-annealing cooling conditions, i.e. furnace cooling (heat treatment (HT) 1 – slow cooling) and air cooling (HT 2 – fast cooling), on the microstructure and mechanical properties of selective laser melting (SLM) built austenitic 316L stainless steel (SS). Design/methodology/approach Three sets of 316L SS samples were fabricated using
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Study of the annealing influence on the mechanical performance of PA12 and PA12 fibre reinforced FFF printed specimens Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-15 Isaac Ferreira; Carolina Melo; Rui Neto; Margarida Machado; Jorge Lino Alves; Sacha Mould
Purpose The purpose of this study is to evaluate and compare the mechanical performance of FFF parts when subjected to post processing thermal treatment. Therefore, a study of the annealing treatment influence on the mechanical properties was performed. For this, two different types of Nylon (PA12) were used, FX256 and CF15, being the second a short fibre reinforcement version of the first one. De
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Optimizing the pinch-off problem for gradient triply periodic minimal surface cellular structures manufactured by selective laser melting Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-07 Mingkang Zhang; Yongqiang Yang; Wentao Qin; Shibiao Wu; Jie Chen; Changhui Song
Purpose This study aims to focus on the optimized design and mechanical properties of gradient triply periodic minimal surface cellular structures manufactured by selective laser melting. Design/methodology/approach Uniform and gradient IWP and primitive cellular structures have been designed by the optimized function in MATLAB, and selective laser melting technology was applied to manufacture these
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Investigation into effects of cooling rate on properties of polyamide 12 parts in the multi jet fusion process Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-12 Mattia Mele; Giampaolo Campana; Gregorio Pisaneschi; Gian Luca Monti
Purpose Multi jet fusion is an industrial additive manufacturing technology characterised by high building speed and considerable properties of the parts. The cooling phase represents a crucial step to determine productivity, since it can take up to 4.5 times the building time. The purpose of this paper is to investigate into effects of cooling rate on parts manufactured by multi jet fusion. Crystallinity
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3D printing of geopolymer-based concrete for building applications Rapid Prototyping J. (IF 3.099) Pub Date : 2020-09-24 Asif Ur Rehman; Vincenzo M. Sglavo
Purpose Three-dimensional (3D) printing technology allows geometric complexity and customization with a significant reduction in the structural environmental impact. Nevertheless, it poses a serious threat to the environment when organic binders are used. Binder jet printing of alkali-activated geopolymer precursor can represent a successful and environmental-friendly alternative. Design/methodology/approach
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Mapping value clusters of additive manufacturing on design strategies to support part identification and selection Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-26 Christoph Klahn; Filippo Fontana; Bastian Leutenecker-Twelsiek; Mirko Meboldt
Purpose Additive manufacturing (AM) allows companies to create additional value in the processes of new product development and order fulfillment. One of the challenges for engineers is to identify suitable parts and applications for additive manufacturing. The purpose of this paper is to investigate the relation between value creation and the design process. The implications of this relation provide
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Mechanical behaviour and interface evaluation of hybrid MIM/PBF stainless steel components Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-15 Aldi Mehmeti; Pavel Penchev; Donal Lynch; Denis Vincent; Nathalie Maillol; Johannes Maurath; Julien Bajolet; David Ian Wimpenny; Khamis Essa; Stefan Dimov
Purpose The paper reports an investigation into the mechanical behaviour of hybrid components produced by combining the capabilities of metal injection moulding (MIM) with the laser-based powder bed fusion (PBF) process to produce small series of hybrid components. The research investigates systematically the mechanical properties and the performance of the MIM/PBF interfaces in such hybrid components
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Realistic design of laser powder bed fusion channels Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-15 Christopher Gottlieb Klingaa; Sankhya Mohanty; Jesper Henri Hattel
Purpose Conformal cooling channels in additively manufactured molds are superior over conventional channels in terms of cooling control, part warpage and lead time. The heat transfer ability of cooling channels is determined by their geometry and surface roughness. Laser powder bed fusion manufactured channels have an inherent process-induced dross formation that may significantly alter the actual
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Investigating additive manufacturing implementation factors using integrated ISM-MICMAC approach Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-26 Harshad Sonar; Vivek Khanzode; Milind Akarte
Purpose The purpose of this paper is to identify various factors influencing additive manufacturing (AM) implementation from operational performance in the Indian manufacturing sector and to establish the hierarchical relationship among them. Design/methodology/approach The methodology includes three phases, namely, identification of factors through systematic literature review (SLR), interviews with
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Nondestructive evaluation of fused filament fabrication 3D printed structures using optical coherence tomography Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-19 Lucas Ramos De Pretto; Marcello Magri Amaral; Anderson Zanardi de Freitas; Marcus Paulo Raele
Purpose The quality of components under fused filament fabrication (FFF) is related to the correct filament spacing and bonding of successively deposited layers and is evaluated mainly by scanning electron microscopy (SEM). However, it is a destructive technique and real-time evaluation is not possible. Optical coherence tomography (OCT), on the other hand, is an optical method that acquires cross-sectional
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Comparative study of the flexural properties of ABS, PLA and a PLA–wood composite manufactured through fused filament fabrication Rapid Prototyping J. (IF 3.099) Pub Date : 2020-10-28 J.A. Travieso-Rodriguez; R. Jerez-Mesa; Jordi Llumà; Giovanni Gomez-Gras; Oriol Casadesus
Purpose The aim of this paper is to analyze the mechanical properties of acrylonitrile-butadiene-styrene (ABS) parts manufactured through fused filament fabrication and compare these results to analogous ones obtained on polylactic acid (PLA) and PLA–wood specimens to contribute for a wider understanding of the different materials used for additive manufacturing. Design/methodology/approach With that
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The effect of support structures on maraging steel MS1 parts fabricated by selective laser melting at different building angles Rapid Prototyping J. (IF 3.099) Pub Date : 2020-08-11 Qiqiang Cao; Jiong Zhang; Shuai Chang; Jerry Ying Hsi Fuh; Hao Wang
Purpose This study aims to further the understanding of support structures and the likely impacts on maraging steel MS1 parts fabricated by selective laser melting (SLM) at 45°, 60° and 75° building angles. Design/methodology/approach Two groups of samples, one group with support structures and the other group without support structures, were designed with the same specifications and printed under
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A novel post-processing method for 316L steel specimen generated by SLM using TiN/TiAlN multilayer coating Rapid Prototyping J. (IF 3.099) Pub Date : 2020-08-10 Yueling Lyu; Yangzhi Chen; Yulin Wan
Purpose Selective laser melting (SLM) is an important advanced additive manufacturing technology. The existing SLM printing technology cannot manufacture the mechanical parts that fully meet the requirements of high precision and strength. This paper aims to explore a new post-processing method for SLM 316L specimen, namely, using of the TiN/TiAlN multilayer coating fabricated by multi-arc ion plating
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Effect of post-treatment on the microstructure and mechanical properties of selective laser melted Ti6Al4V lattice structures Rapid Prototyping J. (IF 3.099) Pub Date : 2020-07-23 Xina Huang; Lihui Lang; Shuili Gong; Mali Zhao
Purpose The purpose of this paper is to investigate the post-treatment processes on lattice structures of selective laser melting. Moreover, the effect of pressure during hot isostatic pressing (HIP) is determined. Design/methodology/approach Three post-treatment processes, annealing at 650°C, 920°C and HIP were adopted. The microstructure evolution and mechanical properties of selective lasering melted
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Fabrication of a piezoelectrically driven micropositioning 3-DOF stage with elastic body using a multi-material 3D printer Rapid Prototyping J. (IF 3.099) Pub Date : 2020-07-23 Sang-Woo Baek; Nahm-Gyoo Cho; Dong-Hyeok Lee
Purpose This paper aims to propose a method for manufacturing multi-material monolithic structures with flexible materials to construct the elastic body by using a dual-nozzle three-dimensional printer to develop a piezoelectric (PZT)-driven micropositioning stage with three degrees of freedom (3-DOF) and flexure hinges. Design/methodology/approach Polylactic acid (PLA) and nylon were used for the
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Numerical study of heat transfer characteristics in positional wire and arc additive manufacturing Rapid Prototyping J. (IF 3.099) Pub Date : 2020-07-27 Dongqing Yang; Jun Xiong; Rong Li
Purpose This paper aims to fabricate inclined thin-walled components using positional wire and arc additive manufacturing (WAAM) and investigate the heat transfer characteristics of inclined thin-walled parts via finite element analysis method. Design/methodology/approach An inclined thin-walled part is fabricated in gas metal arc (GMA)-based additive manufacturing using a positional deposition approach
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Thermal rounding of micron-sized polymer particles in a downer reactor: direct vs indirect heating Rapid Prototyping J. (IF 3.099) Pub Date : 2020-08-11 Juan Sebastian Gomez Bonilla; Maximilian Alexander Dechet; Jochen Schmidt; Wolfgang Peukert; Andreas Bück
Purpose The purpose of this paper is to investigate the effect of different heating approaches during thermal rounding of polymer powders on powder bulk properties such as particle size, shape and flowability, as well as on the yield of process. Design/methodology/approach This study focuses on the rounding of commercial high-density polyethylene polymer particles in two different downer reactor designs
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Effect of infiltrant-related parameters on mechanical performance for 3DP technology Rapid Prototyping J. (IF 3.099) Pub Date : 2020-09-04 Weiwei Wu; Zhouzhou Wang; Shuang Ding; Aiping Song; Dejia Zhu
Purpose The effects of infiltrant-related factors during post-processing on mechanical performance are fully considered for three-dimensional printing (3DP) technology. The factors contain infiltrant type, infiltrating means, infiltrating frequency and time interval of infiltrating. Design/methodology/approach A series of printing experiments are conducted and the parts are processed with different
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Pores and the formation mechanisms of SLMed AlSi10Mg Rapid Prototyping J. (IF 3.099) Pub Date : 2020-08-31 Tingting Wang; Shimin Dai; Hailong Liao; Haihong Zhu
Purpose To fabricate high performance parts, this paper aims to systematically study the pores characteristics and their formation mechanisms in selective laser melting (SLM) AlSi10Mg. Design/methodology/approach Cubes of 10 × 10 × 5 mm were manufactured in different laser power, scan speed and scan space. Optical microscope (OM) and scanning electron microscopes (SEM) were used to observe morphology
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An improved medial axis path generation algorithm for selective laser melting Rapid Prototyping J. (IF 3.099) Pub Date : 2020-09-21 Li Zhang; Linshan Ding; Saif Ullah; Tao Hu; Yangyang Xu; Li Chen; Muhammad Hanif
Purpose The principle of the medial axis calculation is complicated and difficult to implement. Moreover, the accuracy is not high. Then, as the generated path has an endpoint at the boundary of the polygon, burrs may appear on the surface of the molded piece. This paper aims to improve the warpage deformation of SLM molded parts and the surface quality of molded parts, an improved mid-axis path generation
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Influence of ABS print parameters on a 3D open-source, self-replicable printer Rapid Prototyping J. (IF 3.099) Pub Date : 2020-09-07 André Luiz Alves Guimarães; Vicente Gerlin Neto; Cesar Renato Foschini; Maximiliano dos Anjos Azambuja; Luiz Antonio Vasques Hellmeister
Purpose The purpose of this paper is to investigate and discuss the influence of printing parameters on the mechanical properties of acrylonitrile butadiene styrene (ABS) print by fused deposition modelling (FDM). The mechanical properties of ABS are highly influenced by printing parameters, and they determine the final product quality of printed pieces. Design/methodology/approach For the paper’s
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Nonlinear and linearized gray box models of direct-write printing dynamics Rapid Prototyping J. (IF 3.099) Pub Date : 2020-08-24 Andrej Simeunović; David John Hoelzle
Purpose The purpose of this study is to develop nonlinear and linearized models of DW printing dynamics that capture the complexity of DW while remaining integrable into control schemes. Control of material metering in extrusion-based additive manufacturing modalities, such as positive displacement direct-write (DW), is critical for manufacturing accuracy. However, in DW, transient flows are poorly
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A review of 3D printing processes and materials for soft robotics Rapid Prototyping J. (IF 3.099) Pub Date : 2020-06-20 Yee Ling Yap; Swee Leong Sing; Wai Yee Yeong
Purpose Soft robotics is currently a rapidly growing new field of robotics whereby the robots are fundamentally soft and elastically deformable. Fabrication of soft robots is currently challenging and highly time- and labor-intensive. Recent advancements in three-dimensional (3D) printing of soft materials and multi-materials have become the key to enable direct manufacturing of soft robots with sophisticated
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Effects of post-curing conditions on mechanical properties of 3D printed clear dental aligners Rapid Prototyping J. (IF 3.099) Pub Date : 2020-06-17 Prashant Jindal; Mamta Juneja; Divya Bajaj; Francesco Luke Siena; Philip Breedon
Purpose 3D printing techniques have been widely used for manufacturing complex parts for various dental applications. For achieving suitable mechanical strength, post-cure processing is necessary, where the relative time duration and temperature specification also needs to be defined. The purpose of this study/paper is to assess the effects of post curing conditions and mechanical properties of 3D
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Accuracy of 3D printed guide for orbital implant Rapid Prototyping J. (IF 3.099) Pub Date : 2020-06-23 Jaeyoung Kwon; Guk Bae Kim; Sunah Kang; Younghwa Byeon; Ho-Seok Sa; Namkug Kim
Purpose Extrinsic trauma to the orbit may cause a blowout or orbital fracture, which often requires surgery for reconstruction of the orbit and repositioning of the eyeball with an implant. Post-operative complications, however, are high with the most frequent cause of complications being a mismatch of the position and shape of the implant and fracture. These mismatches may be reduced by computed tomography
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