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Shell-infill composite structure design based on a hybrid explicit- implicit topology optimization method Compos. Struct. (IF 6.3) Pub Date : 2024-03-12 Yilin Guo, Chang Liu, Xu Guo
The present paper introduces a hybrid explicit–implicit topology optimization method for shell-infill composite structure design. The proposed approach effectively combines the advantages of the explicit Moving Morphable Component (MMC) method, which describes structural topology only using a set of geometric parameters, and the implicit Solid Isotropic Material with Penalization (SIMP) method, which
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Improving mechanical behavior of adhesively bonded composite joints by incorporating reduced graphene oxide added polyamide 6,6 electrospun nanofibers Compos. Struct. (IF 6.3) Pub Date : 2024-03-12 Melisa Yeke, Murat Barisik, Metin Tanoğlu, M Erdal Ulaşlı, Kaan Nuhoğlu, Gözde Esenoğlu, Seçkin Martin, Ceren Türkdoğan, Hande İplikçi, Engin Aktaş, Serkan Dehneliler, M Erdem İriş
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Additively-manufactured gradient porous bio-scaffolds: Permeability, cytocompatibility and mechanical properties Compos. Struct. (IF 6.3) Pub Date : 2024-03-11 Yong Xu, Shuangjun Zhang, Wenhao Ding, Haocheng Du, Mengqi Li, Zonghan Li, Meigui Chen
Combining parametric TPMS design and selective laser sintering technology, a scaffold with an internal gradient porous structures (GS) was obtained. The stress distribution and permeability of GS scaffolds were elucidated by numerical simulation and experimental tests to evaluate the biomechanical properties and material transport capacity of scaffolds. The GS scaffolds have the ability to induce bone-like
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Free vibration of cracked FGM Mindlin plate in fluid Compos. Struct. (IF 6.3) Pub Date : 2024-03-11 Hui-Cui Li, Jia-Jia Mao, Heng Hu, Liao-Liang Ke
The free vibration of cracked functionally graded material (FGM) plate in fluid is investigated in this paper. The material components are supposed following the power law and formulated by the Voigt model. The Mindlin plate theory (MPT) including the shear deformation effect is established and the physical neutral plane is adopted to simplify the derivation due to the in-plane displacements of this
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Numerical investigation of internal damage in heterogeneous-structured laminates using a 3D multiple physical mechanisms based constitutive model Compos. Struct. (IF 6.3) Pub Date : 2024-03-09 Shuai Zhu, Emmanuel Brousseau, Yiyu Shao, Wenfei Peng
Heterogeneous-structured laminates (HSLs), which consist of multiple layers of metallic materials arranged in successive pairs of coarse-grained (CG) and nano-grained (NG) layers, have been recently reported to display excellent balance of strength and ductility. However, it is argued that accompanying state-of-art numerical models developed to simulate the deformation of this specific class of composite
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A strength optimization approach for manufacturable 3D printed variable stiffness laminates with a strain-based approximation Compos. Struct. (IF 6.3) Pub Date : 2024-03-06 Zhi Hong, Yi Xiong, Ke Liang, Congze Fan, Yujie Guo
The 3D printed continuous carbon fiber reinforced polymers (CFRP) are promising lightweight structures with outstanding mechanical performance. In this work, we propose a structure-manufacture integrated optimization approach for strength maximization of variable stiffness 3D printed CFRP composites by tailoring the steered printing paths. The rule of mixture is modified to evaluate material properties
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A novel anchor method for large tonnage CFRP cable: Anchorage design and full-scale experiment Compos. Struct. (IF 6.3) Pub Date : 2024-03-05 Wenchao Zhang, Lijun Jia, Kedian Luo, Xiaozhu Teng
This study introduces a novel three-segment CFRP cable anchorage to address stress concentration challenges in CFRP cable anchors. The anchorage features a continuously varying inner cone angle along the anchor length to prevent excessive radial stress on the CFRP cable. The radial stress distribution is theoretically analyzed, followed by a numerical simulation design using the Tsai-Wu failure criterion
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Mechanical logic gate design based on multi-stable metamaterial with multi-step deformation Compos. Struct. (IF 6.3) Pub Date : 2024-03-02 Xiuhui Hou, Tianhao Sheng, Feng Xie, Zichen Deng
Mechanical metamaterials exhibit remarkable design versatility, enabling a series of unconventional mechanical properties via structural modifications. However, it is worth noting that many existing mechanical metamaterials either possess a singular deformation path or only multi-step deformation paths without reusability. This study proposes a novel multi-step deformation metamaterial that possesses
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Experimental investigation of probabilistic failure of SiC/SiC composite tubes under multiaxial loading Compos. Struct. (IF 6.3) Pub Date : 2024-03-02 Chen Hu, Jia-Liang Le, Takaaki Koyanagi, Joseph F. Labuz
This paper presents an experimental investigation of the failure behavior of SiC fiber-reinforced SiC matrix (SiC/SiC) composite tubes under multiaxial loading. A new testing apparatus is designed to independently apply axial stress and internal pressure to SiC/SiC tubes. Acoustic emission (AE) is used to monitor the damage growth in the specimen. Based on the measured stress–strain response, a strain-based
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Experimental and numerical investigation of the energy absorption characteristics of carbon-basalt hybrid fiber reinforced polymer composites under ballistic impact Compos. Struct. (IF 6.3) Pub Date : 2024-03-02 Zhipeng Zhou, Weifu Sun, Nan Zheng, Long-Cheng Tang
The inherent brittleness of carbon fiber (CF) seriously reduces the reliability of CFRP composites subjected to ballistic impact. In this work, carbon/basalt (CF/BF) hybridization was used to improve the impact resistance of CF reinforced epoxy resin (EP) composites. The energy absorption performances and mechanisms of CF/BF/EP composites were investigated through optimizing fiber composition and stacking
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Thermo-Mechanical analysis of laminated Doubly-Curved Shells: Higher order Equivalent Layer-Wise formulation Compos. Struct. (IF 6.3) Pub Date : 2024-03-01 Francesco Tornabene, Matteo Viscoti, Rossana Dimitri
The paper presents a refined two-dimensional formulation for the thermo-mechanical analysis of laminated doubly-curved shell structures under thermodynamic equilibrium conditions. Both the kinematic configuration variables and the temperature variation with respect to the natural equilibrium state are described with a generalized formulation, following the Equivalent Layer-Wise (ELW) approach employing
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Corrigendum to “A Multi Pier (MP) method for the evaluation FRP delamination on flat and curve masonry substrates” [Compos. Struct. 294 (2022) 115793] Compos. Struct. (IF 6.3) Pub Date : 2024-02-29 Liyuan Zhao, Zenghao Song, Hongwei Feng, Meng Zhao, Hiva Pirsaheb
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Design and performance simulation of hybrid hemp/glass fiber composites for automotive front bumper beams Compos. Struct. (IF 6.3) Pub Date : 2024-02-28 Napat Nawawithan, Peerapat Kittisakpairach, Supakit Nithiboonyapun, Kitchanon Ruangjirakit, Pattaramon Jongpradist
This study investigates the use of hemp/glass fiber reinforced epoxy composites for designing automotive front bumper beams, focusing on crashworthiness and pedestrian safety. The composite bumper beam model is evaluated through low- and high-velocity crash simulations and pedestrian leg form impact tests using LS-DYNA software. Optimal stacking sequences are analyzed, with high-strength glass fibers
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Multiband acoustic helical interface states in inverse-designed sonic crystals with glide symmetry Compos. Struct. (IF 6.3) Pub Date : 2024-02-28 Yafeng Chen, Shuowei An, Zhihao Lan, Lei Fan, Liang An, Zhongqing Su
Acoustic topological insulators (ATIs) with topological states that are insensitive to defects and impurities offer a robust way to steer acoustic waves. However, current ATIs in square lattice only host topological interface states within one bulk bandgap, restricting their multiband applications. Here, we design the ATI, made of glide-symmetric sonic crystals (SCs), hosting multiband topological
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A modified equally-spaced method (MEQS) for fibre placement in additive manufacturing of topology-optimised continuous carbon fibre-reinforced polymer composite structures Compos. Struct. (IF 6.3) Pub Date : 2024-02-24 Shuai Wang, Haoqi Zhang, Aonan Li, Junaid Ahmad Abdul Qayyum, Yongxing Wang, Zhelong He, Jie Liu, Dongmin Yang
This study proposes a modified equally-spaced (MEQS) method for the path design of continuous fibres in additive manufacturing (AM) of topologically optimised composite structures. The MEQS method addresses the low fibre infill rate issue of the traditional Equally-Spaced (EQS) method by utilising the Offset method to generate looped printing paths around the internal cavities and gaps between continuous
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Experimental study of bonded, bolted, and hybrid bonded-bolted single lap shear joints with woven CFRP adherends Compos. Struct. (IF 6.3) Pub Date : 2024-02-23 Mahdi Damghani, Mohammad Saad Khan, Gary A. Atkinson
This paper presents an extensive experimental performance study of bonded joints (BJs), only bolted joints (OBJs) and hybrid bonded-bolted joints (HJs). For each joint type, three test configurations are considered: namely, short, medium and long overlap lengths. In each case, the adherends comprise quasi-isotropic twill woven CFRP. For each joint type/overlap length combination, three specimens are
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Complex CFRP damage detection with dual multiscale 1DCNNs and self-selective fusion technique of guided waves Compos. Struct. (IF 6.3) Pub Date : 2024-02-23 Yunlai Liao, Yuan Huang, Yihan Wang, Minhuang Wu, Fanghong Zhang, Xinlin Qing
This article presents an innovative damage detection method, named DMS1DCNNs, based on new dual multiscale one-dimensional convolutional neural networks (MS1DCNNs) and a novel self-selective fusion technique for damage localization and quantification in complex carbon fiber reinforced plastic (CFRP) structures. Firstly, a new multiscale piecewise aggregate approximation algorithm (MIPA) is proposed
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Prediction of transverse permeability in representative volume elements with closely arranged fibers through the application of delaunay-triangulation and electrical-circuit analogy Compos. Struct. (IF 6.3) Pub Date : 2024-02-22 Hyeonseong Jo, Sangyoon Bae, Hyunsoo Hong, Wonvin Kim, Seong Su Kim
The distribution of fibers in composite manufacturing significantly affects fiber bundle permeability, a crucial factor for resin impregnation and void formation, which determines final product quality. However, as the industry increasingly seeks composite materials characterized by high fiber volume fractions, the existing numerical analysis methodologies employed for predicting permeability require
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Fiber-level modeling of 3D braided preforms using virtual braiding method Compos. Struct. (IF 6.3) Pub Date : 2024-02-22 Xi Liao, Yanan Jiao, Junbo Xie, Li Chen
High fidelity geometry models of the preforms are essential in mechanical property analysis for composite materials. The paper presents a virtual braiding method to generate digital material twins of 3D braided preforms. The four-step 3D braiding process is simulated based on the concept of virtual fiber and according to the rule of yarn movement. Fiber-level models of the preform are constructed which
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Small-dependent nonlinear analysis of functionally graded triply periodic minimal surface nanoplates Compos. Struct. (IF 6.3) Pub Date : 2024-02-22 P. Phung-Van, P.T. Hung, Chien H. Thai
This paper introduces an effective and simple approach to analyze functionally graded triply periodic minimal surface (FG-TPMS) nanoplates, taking advantage of a novel nonlocal strain gradient nonlinear analysis. TPMS has recently gained attention as an extraordinary solution for constructing structures, drawing inspiration from natural architectures. It offers remarkable features, including high interconnectivity
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Characterization and prediction of tensile properties of carbon fiber-reinforced thermoplastics composed of hybrid short carbon fiber/PA6 fiber nonwoven mats Compos. Struct. (IF 6.3) Pub Date : 2024-02-22 Qian Gao, Yi Wan, Haowen Wei, Jun Takahashi
Hybrid carbon fiber/resin fiber nonwoven mats are considered as a highly promising application of recycled carbon fibers due to their low cost and simple synthesis process. However, the mechanical properties of hybrid nonwoven mats are subject to uncertainties due to nonuniformity of fiber orientations during production procedures, which restricts their use in structural components. This study investigates
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Flexural performance of reinforced concrete beams strengthened using near-surface-mounted carbon-fiber-reinforced polymer bars: Effects of bonding patterns Compos. Struct. (IF 6.3) Pub Date : 2024-02-21 J.B. Lv, D.J. Lin, Bing Fu, S.H. Liu, Z.J. Han
The near-surface-mounted (NSM) fiber-reinforced polymer (FRP) technique is effective for enhancing the load carrying capacity of strengthened reinforced concrete (RC) beams. However, this technique significantly reduces the deformability of strengthened RC beams. To overcome this, the present study combines the NSM strengthening method with the partial bonding technique: the strengthening FRP reinforcement
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Numerical modelling of the structural response of a novel hybrid densified wood filled-aluminium tube dowel for structural timber connections Compos. Struct. (IF 6.3) Pub Date : 2024-02-21 G.B.D.B. Boli, M-G. Tétreault, M. Oudjene, D. Coutellier, H. Naceur, M. Fafard
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Prediction and optimization of global temperature field of composite materials under multiple heat sources Compos. Struct. (IF 6.3) Pub Date : 2024-02-20 Sen Yang, Wen Yao, Lin-Feng Zhu, Richard-Kwok-Kit Yuen, Liao-Liang Ke
The property measurement and structure optimization of composite materials are difficult topics due to the diversity of combinations of composite constituents and complexity of their application environments. The distribution of composite constituents and heat sources can cause heat aggregation phenomenon which may lead to failure of materials. In this paper, we first propose a deep learning-based
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Enhanced core rigidity classifier method (RJS 2.0): A comprehensive approach to properly measure elastic properties of sandwich structures Compos. Struct. (IF 6.3) Pub Date : 2024-02-19 Rodrigo José da Silva, Júlio Cesar dos Santos, Túlio Hallak Panzera, Fabrizio Scarpa
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Influencing factors and sensitivity analysis for the fatigue of FRP wire based on the progressive fatigue damage model Compos. Struct. (IF 6.3) Pub Date : 2024-02-18 Nani Bai, Hui Li, Chengming Lan, B.F. Spencer Jr
FRP cables can experience degradation of their mechanical properties due to repetitive loading, resulting in increasing attention being devoted to their fatigue performance. This study aims to quantify the impact of the following four influencing factors on the fatigue behavior of FRP wire: (i) the applied maximum fatigue stress, (ii) interfacial shear strength, (iii) fiber volume fraction, and (iv)
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Guided wave resonance identification of interface delamination in bimaterial composites Compos. Struct. (IF 6.3) Pub Date : 2024-02-17 Mikhail V. Golub, Artem A. Eremin, Evgeny V. Glushkov, Natalia V. Glushkova
Laminate composites are widely used in industrial applications due to their high material strength and efficiency. In such materials, impact loads can cause internal delaminations at the bonding interfaces between sublayers, which further growth during operation could lead to structural failure. Guided wave based non-destructive testing allows detecting such hidden delamination, which manifests itself
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On the nonlinear dynamics and flutter response of hybrid shape memory alloy composite beams Compos. Struct. (IF 6.3) Pub Date : 2024-02-16 Qianlong Zhang, Fabio Semperlotti
This study presents a theoretical and numerical investigation of the dynamic response of a hybrid SMA composite beam. Particular emphasis is given to the evaluation of the equivalent damping, the aeroelastic stability, and the possibility to tune the composite’s dynamics by means of pre-strain applied locally to the SMA layers. The model of the hybrid composite beam (HCB) accounts for both the material
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3D printing of FRP grid and bar reinforcement for reinforced concrete plates: Development and effectiveness Compos. Struct. (IF 6.3) Pub Date : 2024-02-15 Jun-Jie Zeng, Zi-Tong Yan, Yuan-Yuan Jiang, Pei-Lin Li
3D printed concrete has become increasing popular in research and industry communities, while it faces a lack of effective internal reinforcement. Fiber-reinforced polymer (FRP) reinforcement, which has been used widely as reinforcement for concrete structures, has also been adopted to enhance the performance of 3D printed concrete structures. However, conventional FRP manufacturing processes such
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Nonconventional tow-steered pressure vessels for hydrogen storage Compos. Struct. (IF 6.3) Pub Date : 2024-02-15 Shahrzad Daghighi, Paul M. Weaver
Hydrogen has high gravimetric energy density with accompanying low carbon footprint with potential to replace fossil fuels. Hydrogen at ambient temperature is in the gaseous state and should be stored in pressure vessels that can withstand pressures as large as , making their design challenging. Developments in manufacturing techniques for composite structures enable varying the fibre tow trajectory
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Explosive blast loading effect on transient mechanical responses of aircraft panels with curvilinear fibers: 3D elasticity approach Compos. Struct. (IF 6.3) Pub Date : 2024-02-15 Yasin Heydarpour, Parviz Malekzadeh, Krzysztof Kamil Żur
In the present paper, for the first time, the dynamic loading effect on transient bending and stress distributions of aircraft nanocomposite sandwich panels including curvilinear fibers are presented and explained. Face sheets of the panel contain curvilinear fibers with an orientation angle varies linearly with respect to the horizontal coordinate. The core layer is made of polymer matrix reinforced
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Nonlinear in-plane buckling of small-curved and large-curved FG porous microbeams via strain gradient-based isogeometric collocation formulations Compos. Struct. (IF 6.3) Pub Date : 2024-02-15 Saeid Sahmani, Babak Safaei, Timon Rabczuk
In the current investigation, for the first time, the changes in the limit loads and equilibrium branches associated with the nonlinear in-plane stability characteristics of curved microbeams are explored in the presence of different microstructural gradient tensors. In this regard, multiple microsize-dependent equilibria are analyzed relevant to thermomechanical loaded small-curved, medium-curved
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Adjustable mechanical performances of 4D-printed shape memory lattice structures Compos. Struct. (IF 6.3) Pub Date : 2024-02-13 Yu Dong, Kaijuan Chen, Hu Liu, Jian Li, Zhihong Liang, Qianhua Kan
Lattice structures are widely used due to their inherent advantages. With the development of smart devices, there is a growing demand for programmable, adjustable, and reconfigurable performances. However, a significant limitation of traditional lattice structures is that their shape, function, and performance cannot be changed after fabrication. In order to address this issue, we conducted experimental
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Damage monitoring of pinned hybrid composite–titanium joints using direct current electrical resistance measurement Compos. Struct. (IF 6.3) Pub Date : 2024-02-10 Andreas Dengg, Christoph Kralovec, Martin Schagerl
The present research addresses structural health monitoring of pinned, composite–titanium (i.e.: hybrid) joints with the aim of using their lightweight potential and damage tolerance in future aircraft designs. Together with additively manufactured titanium pins, protruding into the carbon-fiber composite, a single-lap shear joint specimen is monitored with direct current electrical resistance measurements
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Dynamics control of L-shaped composite structure in electric aircraft: Theoretical analysis and experimental validation Compos. Struct. (IF 6.3) Pub Date : 2024-02-09 Jian Zang, Lu Liu, Xu-Yuan Song, Zhen Zhang, Ye-Wei Zhang, Li-Qun Chen
This paper focuses on the vibration control of an L-shaped composite structure, which is a simplified part of the motor support structure in an electric airplane. NiTiNOL steel wire rope (NiTi-ST) is employed as the vibration control mechanism. The study begins with a natural frequency and modal analysis using the Rayleigh-Ritz approach, which is subsequently validated using finite element analysis
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Multi-scale FE[formula omitted] investigation of non linear rate dependent 3D composite structures accounting for fiber–matrix damage Compos. Struct. (IF 6.3) Pub Date : 2024-02-09 H. Oukfif, E. Tikarrouchine, M.-A. Louar, G. Chatzigeorgiou, F. Meraghni
In the present paper, a two-scale FE technique based on periodic homogenization theory is investigated to predict the macroscopic non-linear behavior of polymer matrix composite structures.
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Long-term creep behavior of novel self-anchored CFRP cable system Compos. Struct. (IF 6.3) Pub Date : 2024-02-09 Pengcheng Ai, Guozhen Ding, Zhiyuan Li, Peng Feng
Carbon fiber-reinforced polymer (CFRP) cables are an attractive material for bridge cables due to their light weight, high strength, and corrosion resistance properties. However, research on their long-term creep performance is limited. In this study, long-term creep tests were conducted on self-anchored CFRP cables under various stress levels to evaluate their creep performance and residual mechanical
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Anisotropic hygrothermal fracture mechanics in orthotropic materials: A novel efficient interpolating modified MLS-based EFGM employing radial basis function Compos. Struct. (IF 6.3) Pub Date : 2024-02-08 S.K. Lohit, Amar K. Gaonkar, Tejas P. Gotkhindi
A novel Wendland’s radial basis function (RBF) based Interpolating Modified MLS-based (IMMLS) technique in EFGM is proposed and demonstrated in this work. Anisotropic Hygrothermoelastic Fracture Mechanics (AHFM) problems with orthotropic material model are employed to illustrate Wendland’s RBF-based IMMLS technique and, in addition, to address the research gap in EFGM formulations for these problems
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Interface microstructures and mechanical properties of foamable precursor sandwiches and aluminum foam sandwiches Compos. Struct. (IF 6.3) Pub Date : 2024-02-08 Shijie Yang, Hongjie Luo, Li Wang, Jie Wu, Yongliang Mu, Linli Wu
In this paper, the aluminum foam sandwich (AFS) was obtained from foamable precursor sandwich (FPS) through a foaming process, in which the preparation of FPS was achieved by compound casting with hot rolling. The effects of rolling and foaming on the interface microstructures and mechanical properties were investigated. Furthermore, the interface bonding mechanisms and strengthening mechanisms were
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Multi-stimulus responsive shape memory polyurea incorporating stress-mismatching structure for soft actuators and reversible deployable structures Compos. Struct. (IF 6.3) Pub Date : 2024-02-08 Wen Liu, Deyan Kong, Wei Zhao, Jinsong Leng
Shape memory polymer (SMP) has demonstrated practical applications, including aerospace structures, medical devices, and flexible electronics. The programmability and controllability provide essential convenience for many device applications. Imperfectly, once a programmed temporary shape is deployed into a permanent shape, it cannot recover to the programmed shape without being reprogrammed. Here
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Research of bamboo rat tooth bionic bit structural design and cutting mechanism for CFRP drilling Compos. Struct. (IF 6.3) Pub Date : 2024-02-07 Fei Su, Ke Chen, Xing Liu, Ke Zhang, Xun Ding
The holes are very easy to appear delamination and burr during CFRP drilling. The tool geometry has a great impact on the hole making. In this paper, according to the principle of bionics and structural features, a novel bionic drill bit was designed. The mathematical model of the lower incisor teeth occlusal movement was established. The cutting mechanism of the bamboo rat lower incisor on PW-CFRP
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A theoretical study on the temperature-dependent yield strength of in-situ particle and whisker hybrid-reinforced metal matrix composites Compos. Struct. (IF 6.3) Pub Date : 2024-02-07 Ruozhen Zhang, Pan Dong, Xuyao Zhang, Ziyuan Zhao, Weiguo Li, Tianbao Cheng, Xianhe Zhang
The hybrid effect observed in hybrid-reinforced composites presents a promising opportunity to further enhance the mechanical properties of composites. In this study, a theoretical model is established to determine the yield strength of in-situ particle and whisker hybrid-reinforced metal matrix composites by considering the mechanisms of stress transfer strengthening and grain boundary strengthening
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Vibration suppression of a meta-structure with hybridization of Kresling origami and waterbomb-based origami Compos. Struct. (IF 6.3) Pub Date : 2024-02-07 Haizhou Shi, Kai Zhang, Xiangbing Liu, Hong Liu, Haijun Peng, Zichen Deng
In recent years, the unfolding capability and vibration-isolation properties of spacecraft have received increasing attention. Several studies have achieved deployability through origami structures and low-frequency broadband vibration isolation using origami-inspired meta-structures (OIMs). However, traditional origami prototypes do not fully satisfy aerospace engineering requirements. In this study
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Dynamic crushing performance of foam-filled periodic hybrid cellular structures Compos. Struct. (IF 6.3) Pub Date : 2024-02-07 Ting Liu, Changhai Chen, Yuansheng Cheng
To achieve excellent dynamic crushing performance, an attractive foam-filled periodic hybrid cellular (F-PHC) structure containing both hexagonal and re-entrant cells was designed and fabricated. Dynamic crushing experiments for foam-filled PHC structures were carried out using a direct impact Kolsky bar testing system. Reliable numerical simulations using both finite element method and smoothed particle
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Fatigue crack growth characterization of composite-to-steel bonded interface using ENF and 4ENF tests Compos. Struct. (IF 6.3) Pub Date : 2024-02-07 Weikang Feng, Marcio Moreira Arouche, Marko Pavlovic
In this paper, mode II fatigue crack growth properties of the composite-to-steel interface are characterised through different test configurations, namely ENF and 4ENF tests. Different loading types including force control and displacement control methods are compared. An innovative shear strain based method is proposed for monitoring the mode II crack growth at the bi-material interface through Digital
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A multiscale study on warpage of multi-pinned composites induced by curing process Compos. Struct. (IF 6.3) Pub Date : 2024-02-03 Jisiyuan Cheng, Yingjie Xu, Weihong Zhang, Weiwei Liu
In this paper, we studied the curing process and curing-induced warpage of multi-pinned composite structures through a novel multiscale methodology. This method interconnects the curing kinetics, composite micromechanics, mesoscale depiction and equivalent property calculation of Z-pinned regions, and macroscale warpage prediction by transmitting the evolving degree of cure and cure-dependent material
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Theoretical and numerical analysis on elastic-plastic bending responses of honeycomb beams Compos. Struct. (IF 6.3) Pub Date : 2024-02-02 Xiong Zhang, Xinrong Fu
Cellular honeycomb beams are widely encountered in nature and engineering applications. The mechanical responses of them under various loads are critical to their applications. However, theoretical analyses and predictions of these mechanical responses are quite challenging. In this paper, theoretical studies are carried out to predict their large deformation bending responses. Theoretical expressions
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Dynamic characterisation of novel three-dimensional axisymmetric chiral auxetic structure Compos. Struct. (IF 6.3) Pub Date : 2024-02-02 Anja Mauko, Yunus Emre Yilmaz, Nejc Novak, Tomáš Doktor, Matej Vesenjak, Zoran Ren
The study presents an extensive mechanical and computational characterisation of novel cellular metamaterial with axisymmetric chiral structure (ACS) at different strain rates. The Direct Impact Hopkinson Bar (DIHB) testing device was used for impact testing up to 21 m/s striker speed, which was insufficient to reach the shock deformation regime. Thus, using computational simulations to estimate the
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Efficient framework for ultimate strength prediction and production-based CO2 emission optimization of CFST columns using categorical boosting algorithm and moth flame optimization Compos. Struct. (IF 6.3) Pub Date : 2024-02-01 Viet-Linh Tran, Duc-Kien Thai, Seung-Eock Kim
This study develops an efficient framework for predicting the ultimate strength and optimizing production-based carbon dioxide (CO) emission of concrete-filled steel tube (CFST) columns using the categorical boosting (CB) model and moth flame optimization (MFO) algorithm. In this regard, the MFO algorithm is used for two tasks: (1) to fine-tune the hyperparameters of the CB model for the ultimate strength
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Design and energy absorption characteristics of a novel honeycomb with embedded chiral structures Compos. Struct. (IF 6.3) Pub Date : 2024-02-01 Zheng Bian, Yu Gong, Zhixuan Sun, Libin Zhao, Jianyu Zhang, Ning Hu
Honeycomb structure as a thin-walled structure has excellent mechanical properties. In this work, three types of novel embedded chiral honeycomb (ECH) structures are proposed based on a hybrid strategy and manufactured by using the additive manufacturing (AM) technique. Quasi-static uniaxial compression tests in lateral and diagonal loading are carried out. The loading-displacement curves and deformation
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Behavior and theoretical model of FRP-RC columns under cyclic axial compression Compos. Struct. (IF 6.3) Pub Date : 2024-02-01 Jie-Kai Zhou, Jun-Jie Zeng, Yong-Chang Guo, Yan Zhuge, Wei-Te Liu, Z.H. Xie, Y. Zheng
Fibre-reinforced polymer (FRP) bars have been used as reinforcement for reinforced concrete (RC) structures to solve the problems associated with steel reinforcement corrosion. Although axial compression tests have been conducted and mechanical behavior of RC columns reinforced with FRP bars (FRP-RC columns) has been known to some extent, the cyclic compressive behavior of FRP-RC columns remains unclear
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About the influence of a thermal aggression on the tensile behaviour of hybrid PEEK thermoplastic laminates Compos. Struct. (IF 6.3) Pub Date : 2024-02-01 Lanhui Lin, Benoit Vieille, Christophe Bouvet
This study aims to investigate the influence of different thermal aggressions (resulting in the decomposition of the thermoplastic matrix) on thermal degradation and residual tensile mechanical behavior of hybrid carbon/glass fibers reinforced PolyEther Ether Ketone (PEEK) laminates. The specimens are exposed to isothermal (from melting temperature to decomposition temperature by means of a furnace)
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Robust, self-healable, recyclable and thermally conductive silicone composite as intelligent thermal interface material Compos. Struct. (IF 6.3) Pub Date : 2024-01-24 Ziqian Lin, Hao Jin, Haoyu Deng, Zhaoji Zu, Haiqing Huang, Lanyue Zhang, Hongping Xiang
The facile preparation of robust, thermally conductive, self-healable and recyclable silicone composite is still a major challenge, so an asymmetric dynamic crosslinking chain strategy is proposed herein. Due to the better synergy of dynamic covalent and non-covalent bonds, this crosslinked network designed increases the tensile strength of silicone elastomer by 3 times to 5.1 MPa, compared to traditional
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Carrera Unified Formulation (CUF) for the composite plates and shells of revolution. Layer-wise models Compos. Struct. (IF 6.3) Pub Date : 2024-01-29 E. Carrera, V.V. Zozulya
Here, higher order layer-wise models of elastic composite multilayer plates and shells of revolution are developed using the variational principle of virtual power for the 3-D linear anisotropic theory of elasticity and generalized series in the thickness coordinates. Following the Unified Carrera Formulation (CUF), the stress and strain tensors, as well as the displacement vector, were expanded into
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An efficient parameterized simulation framework for 3D scarf-repaired composite laminates Compos. Struct. (IF 6.3) Pub Date : 2024-01-29 Zhenyu Wang, Yimeng Shan, Bin Fu, Han Yan, Yinghua Liu, Xuefeng Yao
This paper proposes a parameterized simulation framework for predicting the load-bearing capacity of 3D scarf-repaired composite laminates which remarkably reduces the modeling time from several hours to just a few seconds. The specific implementation is demonstrated through a detailed step-by-step explanation. The main contribution lies in: (1) By introducing a reusable geometric partitioning method
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A universal strategy for rapid and scalable surface modification of ultra high molecular weight polyethylene fiber Compos. Struct. (IF 6.3) Pub Date : 2024-01-28 Jiali Yu, Shengnan Chen, Heng Huang, Fei Yu, Pingping Yao, Zhimin Fan, Haiyan Yang, Huichao Liu, Caizhen Zhu, Jian Xu
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Preparation and performance enhancement of n-eicosane/polyvinyl alcohol/MXene flexible phase change composites with sandwich structure Compos. Struct. (IF 6.3) Pub Date : 2024-01-21 Jinlong Zheng, Yong Deng, Dajun Luo, Fuzhong Wu, Xinyi Dai
In this work, flexible n-eicosane (C20)/polyvinyl alcohol (PVA)/MXene flexible composite PCMs (CPM fc-PCMs) with sandwich structure were designed and prepared. The sandwich structure was prepared by layer-by-layer coating, which was beneficial for enhancing performance of flexible phase change composites. Specifically, the sandwich structure of CPM fc-PCMs could effectively solve the leakage and poor