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A couple stress model in non-polynomial framework to examine structural responses of laminated composite micro-plates: An analytical solution Compos. Struct. (IF 5.138) Pub Date : 2021-01-07 Y.S. Joshan; L.K. Sharma; Neeraj Grover; R.K. Godara
In the present article, the couple stress models in the non-polynomial framework are developed and employed to examine the structural response characteristics of composite micro-plates. The length scale effects in the micro-laminates are considered using the couple stress theory. The trigonometric, inverse-trigonometric, hyperbolic, inverse-hyperbolic and exponential shear shape functions are considered
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Free vibration of a cracked FG microbeam embedded in an elastic matrix and exposed to magnetic field in a thermal environment Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Ismail Esen; Cevat Özarpa; Mohamed A. Eltaher
A mathematical model is developed, though this article, to investigate a vibrational behaviour of functionally graded (FG) cracked microbeam rested on elastic foundation and exposed to thermal and magnetic fields. The model includes a size scale effect and temperature dependent material properties, for the first time. The crack is modelled as a rotating spring, that is connecting the two parts of the
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Geometrically nonlinear free vibration of FG-GPLRC circular plate on the nonlinear elastic foundation Compos. Struct. (IF 5.138) Pub Date : 2021-01-13 M. Javani; Y. Kiani; M.R. Eslami
The current article deals with the nonlinear free vibration of nanocomposite circular plates reinforced with graphene platelets (GPL). The functionally graded (FG) plate is considered over a three parameter non-linear elastic foundation. In this research, three types of gradings are assumed for reinforcing the plate by GPLs. The Halpin-Tsai micromechanical rule is exploited to obtain the elastic modulus
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A review of composite bipolar plates in proton exchange membrane fuel cells: Electrical properties and gas permeability Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Kwang Il Jeong; Jae Hyung Oh; Seung A Song; Dongyoung Lee; Dai Gil Lee; Seong Su Kim
Proton exchange membrane fuel cells (PEMFCs) consist of bipolar plates, end plates, membrane electrode assemblies, and gas diffusion layers. Among these components, the bipolar plates (BPs) are the main components because they contribute significantly to the volume, cost, and weight of the PEMFC. Owing to their good electrical and thermal conductivities, graphite and metallic materials are conventional
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The effect of pre-strain and number of SMA wires on the compression properties of glass-epoxy conical grid composites Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 A. Alikhani; A. Basaeri
In the present work, the effect of pre-strain and number of shape memory alloys on the compressive performance of glass/epoxy composite conical shells were studied. The filament-winding process was applied to manufacture the composite specimens, without and with 1 and 2 SMA wires of 0, 1, 2 and 4% pre-strain. Based on the results of the axial compression tests, the maximum stiffness was obtained in
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Modeling of the effect of local material imperfection to the structural mechanical property variability of 2D finite-size cellular structures Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Yan Wu; Li Yang
Understanding the effect of local material property fluctuation on the overall structural properties of cellular structures is not only important for more effective designs, but also critical for their adoption in load-bearing applications. In this work, an analytical modeling approach based on direct stiffness method was adopted, which allows for the implementation of heterogeneous material imperfection
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Hybrid regression and machine learning model for predicting ultimate condition of FRP-confined concrete Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Behrooz Keshtegar; Aliakbar Gholampour; Duc-Kien Thai; Osman Taylan; Nguyen-Thoi Trung
The accurate design-oriented model for concrete confined with fiber-reinforced polymer (FRP) is important to provide safe design of this composite system. In this paper, the response surface model (RSM) is coupled with support vector regression (SVR) for developing a novel hybrid model, namely RSM-SVR, with the aim of predicting the ultimate condition of FRP-confined concrete. Predictions obtained
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Trigger geometry influencing the failure modes in steel/polymer/steel sandwich crashboxes: experimental and numerical evaluation Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Mohamed Harhash; Moritz Kuhtz; Jonas Richter; Andreas Hornig; Maik Gude; Heinz Palkowski
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High performance model for buckling of functionally graded sandwich beams using a new semi-analytical method Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Jun Liu; Bing He; Wenbin Ye; Fan Yang
In this paper, a new semi-analytical approach based on the scaled boundary finite element method (SBFEM) is proposed to solve buckling problem of functionally gradient material (FGM) sandwich beams. Material properties of each individual layer are assumed to be continuously graded along the thickness according to a power law function with respect to the volume fractions. Based on the layer-wise theory
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Effect of laser patterning on axial crushing performance of cylindrical 22MnB5 tubes Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Hyung-gyu Kim; Jonghun Yoon
This paper describes the effects of various laser patterns on as-received 22MnB5 tubes for selective local strengthening. It has been confirmed that strengthened cross-sectional areas, perpendicular to the axial direction by laser patterning, and uniform strength distributions between the as-received and strengthened area can induce the concertina mode under axial crushing. The auxetic and helical
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Shear Strengthening of RC Beams with Externally Bonded UHPFRC Laminates Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Hasan Murat Tanarslan; Çağlar Yalçinkaya; Ninel Alver; Cihan Karademir
One of the most frequent and catastrophic problems encountered in reinforced concrete (RC) structures is failure due to shear deficiency in RC structures, especially in RC beams. Thus, in the scope of this experimental study, the effectiveness of using prefabricated ultra-high performance fiber-reinforced concrete (UHPFRC) laminates in the form of plate or strip for shear strengthening was investigated
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A model reduction method for nonlinear analysis of materials and structures with tension-compression asymmetric properties Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Liang Zhang; Mengkai Lu; Liangliang Han; Jinjun Cao
A non-smooth tension-compression asymmetric constitutive law has important applications in modelling of bio-composite structures with a unilateral contact behavior and no-tension/compression structures. Quadratic programming algorithms based on Parametric Variational Principle (PVP) have good numerical robustness on this kind of issue. However, the challenge of computational cost prevents its application
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Assessment Of The Existing Models To Evaluate The Shear Strength Contribution Of Externally Bonded FRP Shear Reinforcements Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Eva Oller; Renata Kotynia; Antonio Marí
This paper presents an analysis of the performance of different existing formulations to quantify the FRP contribution to the shear strength of RC elements strengthened in shear by externally bonded FRP sheets. A large database of 555 tests has been assembled distinguishing between the shape of the section, the existence of internal transverse reinforcement and the FRP configurations. In general, predictions
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Placement suitability analysis of automated fiber placement on curved surfaces considering the influence of prepreg tow, roller and AFP machine Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Weiwei Qu; Ruming He; Liang Cheng; Di Yang; Jiaxin Gao; Han Wang; Qian Yang; Yinglin Ke
Automated fiber placement (AFP) is an important process used for fabrication of composite structures. Path planning is one of the important steps in the process of AFP. The rationality of the path is directly related to the quality of the composites component. However, the generation of the placement path is constrained by a variety of factors, including geometry characteristics of curved surface,
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Behaviour Of FRP-Confinied Coal Reject Cocnrete Columns UNDER Axial Compression Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Hongchao Zhao; Ting Ren; Alex Remennikov
The relatively low strength and brittleness are believed to be two main factors restricting the widely use of coal reject concrete (i.e. CRC) in practical applications. This paper presents a concept of the novel FRP-confined hybrid concrete column to provide an alternative method to widen the use of CRC. The systematic compression tests on natural aggregate concrete (i.e NAC) and CRC with a large replacement
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Experimental investigation of the rotational behaviour of glulam column-beam joints reinforced with fiber reinforced polymer composites Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Ş. Kılıncarslan; Y. Simsek Turker
Glulam columns and beams are structural wood engineering products, which are formed by gluing the timbers together in parallel with the help of glue and are widely used in the construction of wood structures. Steel plates, aluminum plates or simply wooden parts are commonly used at the joints of wood structures. Steel elements that are often used as joints can corrode and also aluminum plates are not
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Vibration behaviors of two-directional carbon nanotube reinforced functionally graded composite plates Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Armagan Karamanli; Metin Aydogdu
The dynamical analysis of two directional functionally graded carbon nanotube reinforced composite (2DFG-CNTRC) plates are studied for various boundary conditions. The effects of the CNT distribution in the two directions on the dimensionless frequencies are investigated and compared with the unidirectional CNT distributions (1DFG-CNTRC) with respect to the variation of the CNT configuration, volume
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Buckling and post-buckling analyses of composite cellular beams Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Felipe Piana Vendramell Ferreira; Konstantinos Daniel Tsavdaridis; Carlos Humberto Martins; Silvana De Nardin
This paper aims to investigate the buckling and post-buckling analyses of composite cellular beams. For this, the numerical model is calibrated by experimental tests via post-buckling analysis. A parametric study is developed, considering six cross sections. For each section, the opening diameter and web post length are varied. Regarding the buckling analyses for the symmetrical sections, it was concluded
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Polymer composite materials : A comprehensive review Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Rachid Hsissou; Rajaa Seghiri; Zakaria Benzekri; Miloudi Hilali; Mohamed Rafik; Ahmed Elharfi
Herein, in the present review we developed and investigated a comprehensive review of advanced composite materials based on thermoplastic polymers, elastomer polymers and thermosetting polymers. These advanced composite materials were reinforced by organic and/or inorganic fibers and formulated using various fillers such as organic, mineral and metallic. Further, we present the development and the
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A predictive model for the bond strength of near-surface-mounted FRP bonded to concrete Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Ruiliang Zhang; Xinhua Xue
This paper presents two artificial intelligence techniques (e.g., gene expression programming (GEP) and random forest (RF)) for predicting the bond strength of near-surface-mounted (NSM) fiber-reinforced polymer (FRP) strips or rods bonded to concrete. Experimental data from 145 direct pullout tests collected from the literature and five parameters, namely, the bond length, FRP axial rigidity, groove
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Group Effect Of GFRP-Timber Bolted Connections In Tension Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Chao Wu; Zixiao Zhang; Li-ho Tam; Peng Feng; Li He
Steel plate bolted connections are frequently used in timber structures. However, these connections may incur durability problem due to the corrosion of the steel plates. This paper proposes using GFRP plate to replace steel plate in timber connections to mitigate the corrosion issue. The group effect of the proposed GFRP-timber bolted connection is studied. Tensile tests of GFRP-timber bolted connections
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Hybrid damping treatment of a layered beam using a particle-filled viscoelastic composite layer Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Abhay Gupta; Satyajit Panda
This work deals with the damping capability of an actively constrained viscoelastic particulate composite (VEPC) layer in attenuation of vibration of a beam element. The overall beam is composed in the layered form where VEPC layer is constrained between the substrate beam and extension actuated piezoelectric layer. The VEPC layer is a graphite particle-filled viscoelastic composite layer and its effective
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Effect of transverse and longitudinal reinforcement ratios on the behaviour of rc t-beams shear-strengthened with embedded frp bars Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Kagan Sogut; Samir Dirar; Marios Theofanous; Asaad Faramarzi; Amar Nath Nayak
Seven reinforced concrete (RC) T-beams, comprising two unstrengthened (control) beams and five beams strengthened in shear with embedded FRP bars, were tested to failure. The test parameters were steel-to-FRP shear reinforcement ratio and tension reinforcement ratio. A nonlinear finite element (FE) model was developed, validated and used to conduct parametric studies. The experimental and FE results
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Application of homogenization approaches to the numerical analysis of seating made of multi-wall corrugated cardboard Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Berta Suarez; M Luisa M. Muneta; Juan D. Sanz-Bobi; Gregorio Romero
Corrugated cardboard presents small geometries that make unfeasible the use of detailed three-dimensional numerical models, though homogenization approaches can be used to define equivalent homogenous plate models at a macro-mechanical scale. In this paper, we performed a finite element analysis of a well-known chair design, originally made of honeycomb cardboard, but replacing this material with single-
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Nondestructive determination of local material properties of laminated composites with the Impulse Excitation Technique Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Carlo Boursier Niutta; Andrea Tridello; Giovanni Belingardi; Davide Salvatore Paolino
An innovative experimental methodology for the nondestructive assessment of local elastic properties of composite materials is proposed in this paper. A local region of rectangular shape is isolated on the investigated laminate with a proper clamping system. The first resonant frequency of the retained region with clamped boundaries is determined through the Impulse Excitation Technique. In order to
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Morphology characterization and in-situ three-dimensional strain field monitor of short carbon fiber-reinforced polymer composites under tension Compos. Struct. (IF 5.138) Pub Date : 2021-01-26 Panding Wang; Jiawei Wen; Hongshuai Lei; Haosen Chen; Baosheng Xu; Le Yan; Daining Fang
In-situ Micro X-ray computed tomography (μCT) offers a new opportunity to monitor the 3D morphology and damage evolution of short carbon fiber-reinforced polymer (SCFRP) composite. However, the sample size of in-situ μCT is generally limited to achieve high revolution, which resulted in different mechanical behavior compared with that obtained from standard samples. In this study, μCT scans with two
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Compression after impact behavior of carbon/epoxy composite sandwich panels with Nomex honeycomb core subjected to low velocity impacts at extreme cold temperatures Compos. Struct. (IF 5.138) Pub Date : 2020-12-24 Mathilde Jean-St-Laurent; Marie-Laure Dano; Marie-Josée Potvin
The effect of temperature during impact on the compression after impact behavior of carbon/epoxy composite sandwich panels with Nomex honeycomb core is investigated. Impact tests were performed at room temperature, −70 °C, and −150 °C, while compression after impact tests on the damaged panels are performed at room temperature in order to isolate the effect of temperature during impact on the residual
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fEffect of cutting parameters on thrust force, torque, hole quality and dust generation during drilling of GLARE 2B laminates Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Imed Boughdiri; Khaled Giasin; Tarek Mabrouki; Redouane Zitoune
The present study investigates the effects of machining parameters and the tool coating during drilling of a GLARE® hybrid aerospace material on the cutting forces, hole quality and the generation of harmful dust particles. The drilling tests were conducted using twist drills with diamond-like carbon (DLC), Cristall coating and without coating. Obtained results indicate that feed, in contrast to spindle
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Preparation and characterization of 3D flexible high-distance spacer fabric/foam composite Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Yaxin Sun; Lihua Lyu; Biao Yan; Gaoming Jiang; Pibo Ma
In order to solve the problem of poor damage resistance of foam, limited thickness of ordinary spacer fabric and complex preparation process of composite, a high-distance spacer fabric/foam composite (HFFC) was designed via a simple and rapid method without molds. The HFFC was composed of two polyvinyl chloride (PVC) faces and a foam-filled high-distance spacer fabric core. Nine kinds of high-distance
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Investigation of impact resistance performance of pyramid lattice sandwich structure based on SPH-FEM Compos. Struct. (IF 5.138) Pub Date : 2021-01-13 Bing Xue; Yu-Xiang Peng; Shao-Fei Ren; Nian-Nian Liu; Qi Zhang
In this paper, we have studied the influence of the panel thickness on the underwater impact resistance performance of the pyramid lattice structure based on the SPH-FEM method. Firstly, a benchmark case is simulated and compared with the experimental results to verify the accuracy of SPH-FEM for fluid-structure interaction (FSI) problems. Then, the dynamic response of the pyramid lattice structure
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Effects of volume fraction and diameter of hollow spheres on acoustic properties of Metallic-Hollow-Sphere/Polyurethane (MHSP) acoustic composites Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Tianmiao Yu; Fengchun Jiang; Ruipeng Zhang; Mengxin Cao; Ruonan Qin; Chunhuan Guo; Zhenqiang Wang; Yunpeng Chang
Metallic hollow spheres and polyurethane resin are excellent sound insulation and sound absorption materials. In this study, the surface modified 316L stainless steel hollow spheres were added into polyurethane by casting method. The influence of the volume fraction and diameter of the hollow spheres on the sound insulation and sound absorption performance of the Metallic-Hollow-Sphere/Polyurethane
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3D finite element modeling of yarn reinforced mineral matrix: Comparison of damage behavior with experimental data Compos. Struct. (IF 5.138) Pub Date : 2021-01-11 Omayma Homoro; Thouraya Baranger; Marie Michel
Mineral-based composites are presented as a real alternative to the use of Fiber Reinforced Polymer (FRP) composites. However, most studies have focused only on the global mechanical behavior of the mineral-based composites. The objective of this paper is to develop a 3D numerical model in order to predict global and local tensile behavior of glass yarn/ettringitic matrix composites. Two configurations
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Experimental investigation on bearing behavior and failure mechanism of double-lap thin-ply composite bolted joints Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Yuejie Cao; Duquan Zuo; Y. Zhao; Zengqiang Cao; Jie Zhi; Guo Zheng; T.E. Tay
Thin-ply laminated composites have recently gained increasing attention in the aerospace engineering field, due to enhanced design possibilities and positive size effects with regard to decreasing ply thickness. In this paper, the mechanical behavior of thin-ply laminate and TC21 titanium alloy hybrid joints with double-lap bolted structure under quasi-static loading was studied experimentally. X-ray
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A numerical study on cross ply laminates subjected to stray fragments impact loading Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Rahul Singh Dhari
The present study reports the response of composite laminates under high velocity impact by fragments. A numerical model is developed to simulate a hostile scenario of impact of fragments after their interaction with a blast wave to study the response of cross ply laminates. The composite laminates are modelled using a progressive damage model having a string of failure criteria and damage variables
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Predicting multi-axial diffusion of water in laminated composite structural components Compos. Struct. (IF 5.138) Pub Date : 2021-01-08 Yiming Fan; Andrey E. Krauklis; Abedin Gagani; Erik Sæter; Andreas Echtermeyer; Anastasia Muliana
This study examines the diffusion of water in fiber-reinforced polymer (FRP) laminated composites, comprising epoxy resin and unidirectional glass fibers, at different material and structural scales. Experiments on the diffusion of neat resin, FRP laminas in the axial and transverse fiber directions, FRP laminated composites with different stacking sequences, and FRP plates, rods, and pipes are conducted
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Buckling of compressed rectangular orthotropic plate resting on elastic foundation with nonlinear change of transverse displacement over the thickness Compos. Struct. (IF 5.138) Pub Date : 2021-01-05 A.V. Lopatin; E.V. Morozov
Results of investigation of buckling behaviour of an orthotropic composite plate resting on elastic orthotropic foundation with nonlinear change of transverse displacement over the thickness, using the Ritz method are reported in the paper. The foundation has the form of a parallelepiped with the fully fixed bottom plane. A model of the foundation, linking its transverse displacement with the plate
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Examination of selected failure criteria with asymmetric shear stresses in the collapse analysis of laminated shells Compos. Struct. (IF 5.138) Pub Date : 2021-01-05 J. Chróścielewski; A. Sabik; B. Sobczyk; W. Witkowski
The paper is concerned with failure analysis of composite shells performed with the usage of the nonlinear 6-parameter shell theory with drilling rotation degree of freedom. This special theory embodies naturally unlimited translations and rotations and is suitable for analysis of irregular shells for instance with various, particularly orthogonal, intersections. The presence of the drilling rotation
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Experimental and numerical investigations of wrinkle effect on failure behavior of curved composite laminates Compos. Struct. (IF 5.138) Pub Date : 2021-01-07 Haixiao Hu; Dongfeng Cao; Zihe Cao; Shuxin Li
Compared with flat laminates, curved composite laminates are more susceptible to wrinkle defects which must be considered in the design and structural integrity assessment. Combined experimental testing and numerical simulations were carried out in this paper to investigate the influence of wrinkles on the failure behavior of L shaped laminates. Special lay-up and forming processes were used to generate
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Nonlinear dynamic performance of buckled piezoelectric ribbon-substrate energy harvester Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Haohao Bi; Bo Wang; Yongan Huang; Jiaxi Zhou; Zichen Deng
With utilizing of the wearable electronics in daily life, the energy harvesting problem of the electronic devices has become an urgent problem. In this paper, the dynamic behaviour of the energy harvester, which is constructed by bonding piezoelectric ribbons on a pre-strained compliant substrate, is investigated. Taking the geometrical nonlinearity into account, and by using the extended Lagrange
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Study on influencing factors of bending springback for metal fiber laminates Compos. Struct. (IF 5.138) Pub Date : 2021-01-08 Jian Wang; Jiateng Li; Changyun Fu; Guangwu Zhang; Wei Zhu; Xiudong Li; Jun Yanagimoto
In this study, carbon fiber-reinforced plastic (CFRP)/Al laminates are made through autoclave cocuring. Three-point bending, stamping bending, and micromorphology analyses are conducted to study the failure of FMLs in the bending process and the influences of fiber direction, metal thickness ratio, and temperature on springback. Results show that the fiber direction exerts a great influence on the
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Experimental studies on quasi-static axial crushing of additively-manufactured PLA random honeycomb-filled double circular tubes Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Shilong Wang; Min Zhang; Yao Wang; Zhilai Huang; Yuan Fang
The Voronoi-based random honeycomb cylindrical shell with specific mesostructures was constructed programmatically and additively manufactured on material of polylactide (PLA). Then, a new PLA random honeycomb-filled double circular tube (PLA-RHFDCT) was proposed. The mechanical performance of the PLA-RHFDCTs in terms of deformation mode, crushing response and energy absorption was studied experimentally
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Strengthening of elevated home slabs on grade with external fiber-reinforced polymer (FRP) laminate Compos. Struct. (IF 5.138) Pub Date : 2021-01-04 Natawut Chaiwino; Nur Yazdani; Eyosias Beneberu; Kamal Sapkota
Concrete slab on grade homes are being increasingly elevated above the base flood elevation for mitigation of coastal and inland flooding. This is typically accomplished through placing additional beam and pier supports under a raised slab home. In this process, the slab support conditions are changed from uniform soil support to beam supports. This may lead to unanticipated stress/strain changes,
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Compression after impact performance of carbon-fiber foam-core sandwich composites in low temperature arctic conditions Compos. Struct. (IF 5.138) Pub Date : 2021-01-09 Mohammed Elamin; Bing Li; K.T. Tan
This study investigates the compression after impact (CAI) behavior of carbon-fiber foam-core sandwich composites in low temperature arctic conditions. Low-velocity impact and CAI tests are experimentally conducted across temperature from −70 °C to 23 °C. Results show higher compressive strength for non-impacted specimens at low temperature. However, upon impact, severe damage and complex failure modes
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A Strain Energy-Based Homogenization Method for 2-D and 3-D Cellular Materials Using the Micropolar Elasticity Theory Compos. Struct. (IF 5.138) Pub Date : 2021-01-20 A.I. Gad; X.L. Gao; K. Li
A new strain energy-based method for homogenization of 2-D and 3-D cellular materials is developed using an extended version of Hill’s Lemma for the non-Cauchy continuum satisfying the micropolar elasticity theory. Both kinematic and mixed boundary conditions (BCs) that obey the Hill-Mandel condition are identified. The newly proposed method requires that the nodal equilibrium equations be explicitly
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Improving the structural properties of composite T-joints by z-weaving of continuous metallic filaments Compos. Struct. (IF 5.138) Pub Date : 2021-01-18 S. Abbasi; R.B. Ladani; C.H. Wang; A.P. Mouritz
An experimental investigation is presented into improving the maximum load limit and other structural properties of T-shaped laminate joints by through-thickness weaving of thin metal filaments. Preforms of carbon fibre T-joints are first woven using continuous metallic or fibrous filaments made of copper, steel or carbon fibre yarns and then infused with epoxy. Stiffener pull-off tests performed on
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Fabrication and analysis of integrated multifunctional MWCNTS sensors in glass fiber reinforced polymer composites Compos. Struct. (IF 5.138) Pub Date : 2021-01-04 Shah Rukh Shahbaz; Ömer Berk Berkalp; Syed Zameer Ul Hassan; Muhammad Saqib Siddiqui; Muhammad Kashif Bangash
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Mechanical behavior of carbon-reinforced thermoplastic sandwich composites with several core types during three-point bending tests Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 W. Harizi; J. Anjoul; V.A. Acosta Santamaría; Z. Aboura; V. Briand
The originality of this paper is the study of the bending behavior of several carbon-fiber-reinforced thermoplastic sandwich composites under three-point bending tests using a mechanical-acoustic experimental coupling approach. The skins were fabricated from thermoplastic Polyphenylsulfone “PPSU” resin reinforced by 2x2 twill desized carbon fabrics. Different core materials (Nomex, Aluminum and Polyetherimide
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On the vibrations of the non-polynomial viscoelastic composite open-type shell under residual stresses Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Zuocai Dai; Liang Zhang; Seyedeh Yasaman Bolandi; Mostafa Habibi
This paper presents the first attempt to investigate the mechanical behaviors of the three-dimensional theory of poroelasticity for functionally graded graphene platelets reinforced composite (FG-GPLRC) open-shell resting on a non-polynomial viscoelastic substrate involving friction force and under residual stresses. For this purpose, three parameters viscoelastic foundation is developed by taking
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iaxial compressive cyclic behavior of mortar reinforced with crimped or dog-bone-shaped SMA fibers Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Eunsoo Choi; Woo Jin Kim; Taesik Kim
This study investigated the cyclic compressive behavior of mortar reinforced with dog-bone-shaped and crimped SMA fibers. Both types of SMA fibers were made of cold-drawn NiTi SMA wires with 1.0-mm diameter. The fibers’ characteristics of tensile behavior and recovery stress were investigated before they were embedded in cement mortar. For cyclic compressive testing, plain mortar and reinforced mortar
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Experimental Investigation of Prepreg Tackiness in Automated Fiber Placement Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Muhsan Belhaj; Ali Dodangeh; Mehdi Hojjati
Automated fiber placement (AFP) is widely used to manufacture composite lightweight structures in different industries, including aerospace. Prepreg tackiness plays an important role in the AFP process. This study aims to measure the prepreg tackiness at different AFP processing conditions and predict the optimum parameters for high tackiness levels. Two in-house setups were developed for layup and
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Failure analysis of thin-walled composite profiles subjected to axial compression using progressive failure analysis (PFA) and cohesive zone model (CZM) Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Rozylo Patryk; Wysmulski Pawel
In the presented paper, the phenomenon of failure of axially compressed thin-walled composite structures with channel shape was analysed. The tested thin-walled structures were made of CFRP composite using the autoclave method. In the research, experimental tests on actual columns and advanced numerical calculations using the finite element method were conducted. The numerical calculations were carried
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Mechanism of bonding of AA7075 aluminum alloy and CFRP during Friction Assisted Joining Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Francesco Lambiase; Alfonso Paoletti; Massimo Durante
This work investigates the mechanism of bonding and the influence of the process parameters during Friction Assisted Joining of aluminum alloy AA7075 with carbon fiber reinforced PolyPhenylene Sulfide. Laser texturing was performed on the aluminum surface to promote mechanical interlocking between the metal and reinforced plastic substrates. The influence of the tool rotation speed, the plunging force
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Delamination in carbon fiber epoxy DCB laminates with different stacking sequences: R-curve behavior and bridging traction-separation relation Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Yu Gong; Xinjian Chen; Wangchang Li; Libin Zhao; Junan Tao; Jianyu Zhang; Ning Hu
R-curve and traction-separation relation are commonly used to characterize the fiber bridging, which is significant toughening mechanism in composite laminates. Current investigations are mainly focused on unidirectional laminates. However, the dependence of the R-curve and traction-separation relation on the stacking sequence is still lack of comprehensive studies. Here, the effect of stacking sequence
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In-situ Effect in Cross-ply Laminates under Various Loading Conditions Analyzed with Hybrid Macro/Micro-scale Computational Models Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Qingping Sun; Guowei Zhou; Haibin Tang; Zhaoxu Meng; Mukesh Jain; Xuming Su; Weijian Han
In this work, multi-scale finite element analyses based on three-dimensional (3D) hybrid macro/micro-scale computational models subjected to various loading conditions are carried out to examine the in-situ effect imposed by the neighboring plies on the failure initiation and propagation of cross-ply laminates. A detailed comparative study on crack suppression mechanisms due to the effect of embedded
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State of the art in functionally graded materials Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Vasavi Boggarapu; Raghavendra Gujjala; Shakuntla Ojha; Sk Acharya; Venkateswara babu P; Somaiah Chowdary; Dheeraj kumar Gara
This paper discourses an overview of the recent advancements in functionally graded materials (FGMs) research. The paper also disseminates on the key researches that are carried out in the scientific community on the development of manufacturing and modelling of functionally graded materials. The rationale of the current work is to emphasize the selection of materials, processing techniques and analytical
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Mechanical model for predicting thrust force with tool wear effects in drilling of unidirectional CFRP Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Yu Bai; Zhen-yuan Jia; Rao Fu; Jia-xuan Hao; Fu-ji Wang
Thrust force is the most influential factor to the frequent-occurred drill-exit damages in the drilling of carbon fiber reinforced polymer/plastic (CFRP). The accurate prediction of this thrust force is of great importance for drilling process optimization to suppress these damages. However, the thrust force in drilling CFRP is strongly coupled with rapid tool wear which brings significant challenges
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Failure analysis of thin-walled composite structures using independent advanced damage models Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 P. Rozylo
The aim of the study is to present a complex phenomenon of damage in thin-walled composite structures with an top-hat cross-section subjected to axial compression. Actual structures were prepared using the auto-clave technique (CFRP composite). Research was conducted in a full range of load – until construction damage. In the case of experimental testing both post-critical equilibrium paths and acoustic
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A multi-area fatigue damage model of composite honeycomb sandwich panels under three-point bending load Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Mingze Ma; Weixing Yao; Wen Jiang; Wei Jin; Yan Chen; Piao Li
The fatigue damage of composite sandwich panels is divided into two parts: the face sheet damage and the core damage. Both the two kinds of damage cause the performance degradation of panels, however only the core damage results in the ultimate failure. In this paper, a fatigue damage model of the face sheet and the core is proposed and three-point bending tests are carried out to obtain the deflection
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Isogeometric thermal postbuckling analysis of porous FGM quasi-3D nanoplates having cutouts with different shapes based upon surface stress elasticity Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Fan Fan; Cai Xiumei; Saeid Sahmani; Babak Safaei
In the current investigation, a surface elastic-based three-dimensional (3D) nonlinear formulation is provided to explore the thermal postbuckling characteristics of porous composite nanoplates made of a functionally graded material (FGM) having a central cutout with different shapes. The surface stress factors are taken into the formulation by choosing the Gurtin-Murdoch theory of elasticity within
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Hygrothermal durability of epoxy adhesives used in civil structural applications Compos. Struct. (IF 5.138) Pub Date : 2021-01-19 Francesco Ascione; Luigi Granata; Liberata Guadagno; Carlo Naddeo
Adhesive durability and joint reliability, strictly related to the bonding agents, are key parameters still under evaluation in civil as well as in other engineering fields. Moisture, different environmental agents and temperature (in particular) can strongly affect the performance of the adhesive joints over the time limiting their applicability. The environmental temperature may exceed the glass
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