Article
Engineering, Manufacturing
Wei-Tsen Lu, Zhenjia Gao, Hari K. Adluru, Kevin H. Hoos, Waruna P. Seneviratne, David H. Mollenhauer, Endel V. Iarve
Summary: This study applies the regularized eXtended Finite Element Method (XFEM) framework to the discrete modeling of damage evolution and interaction in laminated composites. The crack density limit is increased for a given mesh size. The study also introduces the Residual Strength Tracking methodology and an automatic cycle jump step selection algorithm. The predictions show excellent agreement with experimental data.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Review
Materials Science, Textiles
Ziyuan Li, Zufeng Shang, Edoardo Zappa, Lieva Van Langenhove, Benny Malengier
Summary: This article investigates the complex problem of ropes bending over sheaves, using dynamic Finite Element Method simulation and theoretical deduction. The study successfully models the complex interaction within the ropes and examines the factors affecting yarn sliding through parametric studies.
JOURNAL OF INDUSTRIAL TEXTILES
(2023)
Article
Polymer Science
Alberto David Pertuz-Comas, Jorge G. Diaz, Oscar Javier Meneses-Duran, Nixon Yesid Nino-Alvarez, Juan Leon-Becerra
Summary: Fatigue bending tests were performed on a polymer matrix composite material reinforced with continuous Kevlar fibers under controlled displacement. Static characterization and numerical modeling were used to analyze the material properties and fatigue behavior. Morphological analysis of the fractured surface revealed different failure mechanisms.
Article
Engineering, Electrical & Electronic
Yue Yu, Yibo Jiang, Ning Tang, Zheming Tong, Shuiguang Tong
Summary: This paper aims to develop a reliable numerical model for non-braided fabric composite rubber hoses used in industrial hose pumps, which will assist engineers in decision making and reduce prototype testing time and cost.
Article
Engineering, Civil
Tao Liu, Xianyan Wu, Baozhong Sun, Wei Fan, Wanli Han, Honglei Yi
Summary: This paper numerically investigated the impacts of manufacturing defects and braiding angles on the impact compressive properties of 3D carbon fiber/epoxy resin braided composite tubes. The results show that random defects have a negative influence on the compressive failure mechanisms of the braided tubes, and non-ideal models containing appropriate random defects are more accurate in simulating the dynamic compressive failure evolution process.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Manufacturing
Ling Chen, Joel Chong, Qian Jiang, Liwei Wu, Youhong Tang
Summary: A novel composite helical spring with a braided nested structure (BNCHS) is proposed in this study, which shows significantly improved static performance compared to steel.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Mechanical
Chengyu Guan, Zi-Jia Tang, Fei Zhao, Zhiyong Yang, Huimin Li
Summary: A homogenization method is proposed for the vibration analysis of periodic sandwich panels. Periodic boundary conditions are applied to a representative volume element (RVE) and the complex stiffness matrix of the sandwich panels is obtained through direct-solution steady-state dynamic analysis (DSDA) using the finite element method (FEM) in the frequency domain. The natural frequencies, mode shapes, and loss factors of the structures are obtained using shell models based on equivalent single-layer (ESL) theory and finite element-modal strain energy (FE-MSE) method. Pyramidal lattice truss sandwich panels made of carbon fiber reinforced plastics (CFRP) are used to validate the effectiveness of the homogenization method, and the results are compared with experiments and solid models. The effects of the number of cells and damping layers are discussed.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Franco Concli, Lorenzo Maccioni, Lorenzo Fraccaroli, Luca Bonaiti
Summary: This paper evaluates the accuracy of five different fatigue criteria applied to real mechanical components, finding that the Findley and Papadopulus criteria are the most accurate in estimating the level of damage, while the Susmel criterion is the most conservative.
Article
Mechanics
Anubhav Singh, Zewen Gu, Xiaonan Hou, Yiding Liu, Darren J. Hughes
Summary: Braided composites have been widely used in the industrial sector, with properties depending on braid angle for lightweighting through specific structural optimization. This paper introduces an integrated approach combining finite element simulations and genetic algorithms to optimize braided beam structures in rail vehicle spaceframe chassis, achieving significant weight savings.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Ivan Cular, Kresimir Vuckovic, Srecko Glodez, Zdenko Tonkovic
Summary: This paper proposes a computational model for predicting both the location and the required number of cycles for bending fatigue failure in surface hardened spur gears. Linear elastic stresses and strains in a single tooth bending fatigue test are corrected for elastic-plastic material behavior. The tooth root region of spur gear is divided into layers, and fatigue properties are assigned to each layer via the hardness method. Based on the multiaxial fatigue criteria, fatigue failure location and corresponding fatigue lives are estimated. The predicted fatigue lives, failure locations, and transition from surface to subsurface fatigue failure show good agreement with the experimental results.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Guoqing Yu, Boqiang Shi, Yanhua Shen
Summary: This paper presents a more versatile and efficient multi-scale coupling finite element method for investigating the mechanical response of 3D braided composites under three-point bending load. By establishing representative unit-cell models at mesoscale and applying multi-scale homogenization theory, the mathematical relationships between mesoscopic stress fields and macroscopic strain fields are built, predicting the bending modulus and ultimate load-bearing ability of 3D braided composites. The predicted results meet the required precision for engineering when compared with experimental results.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Materials Science, Composites
Yousong Xue, Shuwei Huang, Baozhong Sun, Bohong Gu
Summary: This study investigates the electro-thermal coupling behavior of 3-D braided composite under direct current, with the temperature from Joule heat reducing electric resistance and contact resistance in the composite. The reduction range depends on the temperature effect on electrical conductivity, and a finite element analysis model was developed to demonstrate temperature distribution in the composite under a current density of 32 kA m(-2). The temperature decrease at the two ends of the composite sample compared to the center region is attributed to Joule heat generated from the electric resistance of carbon fiber tows, leading to non-uniform temperature distribution.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Thongchai Fongsamootr, Pana Suttakul, Nakorn Tippayawong, Pruettha Nanakorn, Cristian Cappellini
Summary: This study investigates the out-of-plane bending behavior of two-dimensional periodic plates through finite element simulations and experiments. The effect of unit-cell topologies on the bending responses of the plates is compared numerically and experimentally. The use of beam elements in finite element models allows for approximate predictions of the bending behavior of the plates. The observed bending behavior of the plates is compared with literature findings to validate the finite element results.
MATERIALS TODAY COMMUNICATIONS
(2022)
Review
Materials Science, Textiles
Mingling Wang, Zhongxiang Pan, Jiajia Yu, Ran Xu, Xiaoqiang Du, Zhenyu Wu
Summary: Integrated manufacturing technology was used to fabricate a 3-D triaxial braided sandwich composite guide bar. The axial compression, three-point bending, and vibration performance of the bar were investigated. The study found that the braiding angle had a significant effect on the frequency and deformation morphology of the bar. Under a constrained state, the bending deformation was localized at one end or in the middle of the bar, and a larger braiding angle resulted in a lower frequency.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Composites
Qian Jiang, Ye Qiao, Feng Zhao, Zhongxiang Pan, Xianyan Wu, Liwei Wu, Hongjun Fu
Summary: A novel composite helical spring with skin-core structure was designed and fabricated, improving torsion and bending performance by wrapping the core with a knitting tube. Finite element analysis showed that the skin-core structure enhances the stiffness and load-carrying capacity of the spring.
POLYMER COMPOSITES
(2021)
Article
Engineering, Multidisciplinary
Zhi-yong Li, You-song Xue, Bao-zhong Sun, Bo-hong Gu
Summary: This study reports the ballistic impact damage of plain-woven laminates with different hybrid structures and stacking sequences. Experimental and finite element analysis results show that UHMWPE/Kevlar hybrid laminates with Kevlar layers as the front face have the highest energy absorption capacity.
DEFENCE TECHNOLOGY
(2023)
Article
Materials Science, Textiles
Wei Huang, Yousong Xue, Lingming Xue, Bohong Gu, Baozhong Sun, Wei Zhang
Summary: This paper investigates the electrical responses and electrical-mechanical behaviors of three-dimensional braided composites with different braiding angles under three-point bending load. The correlation between electrical resistance and damage of the composites is also examined. A proposed electrical-mechanical model based on the Weibull distribution function is found to validate the experimental results, providing a theoretical basis for structural health monitoring of three-dimensional braided composites using the electrical resistance change method.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Composites
Wenjing Cao, Yuanyuan Wu, Bohong Gu
Summary: Impact damage distribution is crucial for designing composite structures with high-impact damage tolerances. In this study, the initiation, evolution, and distribution of impact damage in woven composites were investigated. The woven structure was found to greatly influence the damage propagation and the distribution of strain and stress. The high strength and straight arrangement of the weft yarn contributed to its high deformation resistance, large stress value, and wide stress distribution. On the other hand, the crimp of the warp yarn limited the stress distribution, leading to stress and damage concentration.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Materials Science, Textiles
Feng Xu, Jing Long, Baozhong Sun, Bohong Gu
Summary: This study investigates the effects of thermo-oxidative aging on the strain rate sensitivity and compression failure mechanism of three-dimensional angle-interlock woven composites (3DAWCs) using digital image correlation technique and finite element analysis. The results demonstrate that the strain rate sensitivity of 3DAWCs decreases after thermo-oxidative aging. The aging effect also influences the damage initiation and strain localization behavior.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Engineering, Civil
Yuanyuan Wu, Jinhui Guo, Limeng Xun, Baozhong Sun, Bohong Gu
Summary: This study reports the anisotropic low-velocity impact behaviors of 3D braided carbon fiber/epoxy composites after thermo-oxidative aging. The findings show that the loading in the out-of-plane direction has better resistance to aging degradation and more sensitive stiffness degradation.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Composites
Jing Long, Feng Xu, Yuanyuan Wu, Baozhong Sun, Bohong Gu
Summary: The mechanical behaviors of thermo-oxidative aged 3D braided composites are influenced by matrix degradation and crack evolution. The study investigates the degradation behaviors, crack propagations, and mechanical reduction mechanisms of three-dimensional five-directional (3D5d) braided composites under thermal oxygen coupling environment. The aging behaviors in a pure thermal environment were also analyzed for comparison. The results show that the presence of oxygen accelerates crack initiation and propagation, leading to a decrease in the mechanical properties of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Shuwei Huang, Junjie Zhang, Bohong Gu, Baozhong Sun
Summary: Thermal stress concentration, caused by the mismatch of coefficients of thermal expansion, plays a significant role in the fatigue and failure of composites. We demonstrated the practicality of fiber Bragg grating sensors and high-resolution digital image correlation technique for in-situ characterization of thermal strain field evolution in 3D angle-interlocked woven composites. Our study found that the CTE mismatch leads to stress localization at the interface and exhibits a periodic distribution within the 3DAWC. The thermal stress in the resin reaches a maximum of 22 MPa around Tg, close to half of its yield stress.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Dandan Fang, Jianhua Yan, Bohong Gu, Baozhong Sun
Summary: The impact and flexural properties of 3D five-directional braided carbon/glass hybrid epoxy composites were investigated. Different arrangements of carbon fiber and glass fiber in the axial yarn were examined, and it was found that the C/G(2) composite had higher impact energy absorption capacity, while the C/G(1) composite showed higher impact stress. The flexural properties of the C/C-a composite were the best, while the C/G(3) composite exhibited the poorest performance before impact. This study provides guidance for the structural design of composites in specific applications.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Textiles
Juan Fang, Junjie Zhang, Baozhong Sun, Bohong Gu
Summary: The mode I fracture behavior of three-dimensional braided carbon fiber/epoxy composites was investigated using the double-cantilever beam method. The effects of different loading rates on fracture behavior were compared. It was found that the braiding yarns prevent crack initiation and propagation, while the braiding structure causes crack bifurcation. The results show that the three-dimensional braided structure is effective in increasing fracture toughness.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Textiles
Xinyu Gao, Qihang Wang, Baozhong Sun, Bohong Gu, Meiqi Hu
Summary: In this study, a new method for preparing the three-way integrated braided preform was reported. The compressive behaviors of the three-way braided composite tubes were tested to reveal the effects of the braided structure. It was found that reducing branch length or increasing braiding layers can improve the compressive strength and initial stiffness. The main damage mechanisms observed were yarn breakage, yarn debonding, and kink band. The uniform braided structure paves the way for the formation of a seamless braided structure with high compressive strength among the three branch tubes.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Engineering, Civil
Limeng Xun, Shuwei Huang, Baozhong Sun, Bohong Gu
Summary: This study reports the initiation and development of torsional cracks in carbon-fiber 3D braided composite tubes. 3D digital image correlation and micro-CT techniques were used to observe the crack distribution and reveal the correlation with the braided structure. The study found that the torsional damage propagates along the helix of braided bundles and inhibits in the vertical direction within repeated braid units.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Zhiyong Li, Yousong Xue, Baozhong Sun, Bohong Gu
Summary: This study investigated the penetration behavior of hybrid carbon/Kevlar/UHMWPE fiber laminated composites and revealed their complex failure mechanisms. Finite element modeling was used to predict the impact-induced damages for the hybrid composites. The results showed that the energy absorption capability of the hybrid laminates can be improved by 16.4%.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Feng Xu, Jing Long, Shuwei Huang, Baozhong Sun, Bohong Gu
Summary: This study developed a coupled thermo-chemical-mechanical multiphysics model to simulate the thermo-oxidative ageing process of 3D angle-interlock woven composites. The model considers the residual stress state of the composite after curing and successfully predicts the oxidized layer distribution and interface cracks in agreement with experimental results. This model contributes to evaluating the complex stress and interface damage during thermo-oxidative ageing.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Jing Long, Feng Xu, Shuwei Huang, Tianwei Wu, Baozhong Sun, Bohong Gu
Summary: This study investigates the effects of ageing cracks and loading directions on the mechanical behaviors of thermo-oxidative aged 3D braided composites. X-ray micro-computed tomography and digital image correlation technique are used to analyze ageing crack propagations, compressive responses, in-situ strain evolutions, full-field damage distributions, and crack evolution mechanisms. The results reveal ageing weakening behaviors, anisotropy effects, and structure correlations. Ageing cracks affect surface strain and damage distributions but not internal shear modes during out-of-plane (OP) loading. The synergy between ageing cracks and in-plane (IP) loading is greater than that with OP loading. This work provides important guidance for the structural optimization and durability design of 3D braided composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Zhiyong Li, Yousong Xue, Baozhong Sun, Bohong Gu
Summary: Fiber hybrid is a promising strategy for improving the ballistic penetration behaviors of fiber-reinforced laminated composites. This study investigates the effect of hybridization ratios on the ballistic impact damage of carbon/Kevlar/UHMWPE hybrid laminates. The results provide important theoretical basis and experimental reference for designing and developing hard multiphase anti-impact composite structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
