Article
Chemistry, Multidisciplinary
Yifan Ma, Yazhi Li, Lu Liu
Summary: An experimental method is developed for non-standard off-axis tension tests of unidirectional composites. A new oblique end-tab design eliminates stress concentration and in-plane bending moment induced by off-axis tension loading. Finite element analysis and experiments on PEEK/AS4 unidirectional thermoplastic composites were conducted to evaluate the proposed testing method's effectiveness. Simulation and test results show that the use of oblique end-tabs eliminates stress concentration and bending movements.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Composites
Zhe Li, Wei Li
Summary: This study investigates the impact of incorporating a triaxial woven fabric (TWF) into a unidirectional ply structure on the bending performance of the structure. The experimental results showed that adding a layer of TWF significantly improved the flexural strengths and flexural toughness of the structure. The incorporation of TWF also led to a shift in the failure mode from brittle to ductile.
POLYMER COMPOSITES
(2023)
Article
Engineering, Civil
Gang Liu, Kai Huang, Yucheng Zhong, Zhixing Li, Hongjun Yu, Licheng Guo, Shuxin Li
Summary: A novel computational model is established to analyze the damage of 3D angle-interlock woven composites. By validation and prediction, the model can accurately predict the tensile response of the composites at different angles.
THIN-WALLED STRUCTURES
(2023)
Review
Materials Science, Textiles
Hongtao Zhou, Weiqing Jiang, Lei Zhao, Guifu Li, Bin Zhou, Qian Ma
Summary: This paper investigated the off-axis tensile behaviors of triaxial woven fabric reinforced rubber composites, TWFR, experimentally and numerically. Stress-strain curves and tensile failure morphologies were obtained at seven different off-axis angles, showing nonlinear tensile behavior and a tensile-shear mixed failure mechanism in TWFR. The experimental results were in good agreement with the finite element analysis results, indicating the coupling working stage of yarns and rubber matrix in TWFR.
JOURNAL OF ENGINEERED FIBERS AND FABRICS
(2021)
Article
Mechanics
Lei Cheng, Yi Xiao, Jie Wang, Jian Zhao, Zhen Zhang, Yuande Xue
Summary: The study investigates the ratcheting behavior of carbon/epoxy composites under different conditions and proposes a theoretical model. Experimental results show that fiber orientation and loading stress have a significant impact on ratcheting behavior.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Yanchao Wang, Yexin Zhou, Chunhua Jin
Summary: An analytical model is proposed in this paper to describe the nonlinear behavior of a plain-woven composite. The model combines a discrete method with a three-phase micromechanical bridging model, and it can effectively simulate the behavior of the composite under complex load cases.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
B. Mohammadi, M. M. Shokrieh, M. Jamali, A. Mahmoudi, B. Fazlali
Summary: This study investigated the capability of the damage-entropy model in predicting fatigue life of off-axis unidirectional composites. It considered the microcontinuum damage mechanics and fracture fatigue entropy as a fatigue failure criterion, taking into account self-heating, temperature evolution, and viscoelastic properties. The model was validated through experiments on T800H/2500 and E-glass/epoxy composites, showing good agreement between predicted and experimental fatigue life.
COMPOSITE STRUCTURES
(2021)
Article
Polymer Science
Ozan Erartsin, Ahmad Amiri-Rad, Martin van Drongelen, Leon E. Govaert
Summary: This study investigates the time-dependent failure of UD glass/iPP under off-axis loading and proposes a lifetime prediction method for off-axis failure based on plasticity. The results demonstrate the separability of strain rate and fiber orientation angle on tensile strength, and the plasticity-controlled nature of off-axis failure. The proposed lifetime prediction method shows good agreement with experimental data.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Ashish K. Bangaru, Bent F. Sorensen, Lars P. Mikkelsen
Summary: This study investigates the microscale fatigue damage evolution of off-axis tunnelling cracks in non-crimp fabric composites used in wind turbine blades. The height of the tunnelling cracks was found to vary in different layers of the laminate. Additionally, the mode of crack extension was found to depend on the orientation of the backing fibers in the presence of backing.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Mukesh Bajya, Abhijit Majumdar, Bhupendra Singh Butola, Sanchi Arora, Debarati Bhattacharjee
Summary: This study compared the ballistic protection performance of soft armour panels with different structures, finding that UD laminate-based panels outperformed woven fabric panels, with UHMWPE variants performing better than para-aramid. The ideal SAP design should incorporate a heat resistant material in the front layers followed by high-modulus ballistic materials in subsequent layers.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Anqi Li, Joris J. C. Remmers, Marc G. D. Geers, Thierry J. Massart
Summary: The mechanical response of woven composites under off-axis tensile loading is influenced by damage in the yarn-yarn and yarn-matrix interfaces, causing yarns to rotate and reorient. Updating the material axes during loading is important to achieve realistic results, which can be done using a fiber frame stress rate description or a hyperelastic model. This study reformulates the definition of the fiber frame for woven composites and extends the implementation for an implicit solver in ABAQUS. The simulation results demonstrate a realistic stiffness evolution induced by fiber reorientations compared to the standard ABAQUS implementation.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
S. Z. H. Shah, P. S. M. Megat-Yusoff, Tahir Sharif, Syed Zahid Hussain, R. S. Choudhry
Summary: This study presents a comparison of off-axis tensile performance between two types of 3D fibre reinforced composites with different matrices. The results show that thermoplastic composites are notch insensitive and have higher failure strains and energy absorption compared to thermoset composites.
MECHANICS OF MATERIALS
(2022)
Article
Chemistry, Physical
Andrei Axinte, Dragos Ungureanu, Nicolae Taranu, Liliana Bejan, Dorina Nicolina Isopescu, Radu Lupasteanu, Iuliana Hudisteanu, Victoria Elena Rosca
Summary: The greatest advantage of fiber-reinforced composite materials is the freedom to tailor their strength and stiffness properties, while the most significant disadvantage consists in their high costs. Therefore, the optimization of the composite material's geometrical parameters becomes important. This paper presents a follow-up study on using and improving an in-house software called SOMGA (Satin Optimization with a Modified Genetic Algorithm) to optimize the design of satin-reinforced multi-layer composites. The ultimate goal is to find the best possible solution for designing a composite material that can withstand a specific set of in-plane loads, by considering the influence of various woven fabric types.
Article
Materials Science, Multidisciplinary
M. R. T. Arruda
Summary: This paper presents a novel approach to develop an orthotropic damage model based on the original 3D Tsai-Wu failure criterion. The approach fills the gap in knowledge by identifying the location and failure modes of damage, and can be verified with existing data.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Gaetan Poelman, Saeid Hedayatrasa, Wim Van Paepegem, Mathias Kersemans
Summary: This paper introduces an improved infrared thermography method for detecting defects in woven fabric composites. The k-space filtering technique is applied to automatically decompose the thermographic image into a structured thermal background image related to the weave pattern, and a residual image representing other features (such as defects). The proposed method demonstrates enhanced performance in defect detection and sizing.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Mechanics
Jian Deng, Pu Xue, Qiao Zhi Yin, Tian Jian Liu, Xin Wei Wang
Summary: In this study, a three-dimensional damage analysis framework based on the finite element method was proposed to predict the damage evolution and load-bearing capacity of fiber-reinforced composites. The framework accounted for stress interaction, coupling effect, and addressed the issue of finite element mesh dependency.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Jian Deng, Xin Gong, Pu Xue, Qiaozhi Yin, Xinwei Wang
Summary: This article investigates the damage behavior of composite honeycomb sandwich panels subjected to localized low-velocity impact. A computational framework is proposed to predict failure patterns and energy absorption. Experimental validation and parametric study are conducted to explore the effects of structural parameters on the sandwich structure performance.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Zengxian Wang, Xiaojian Chen, Guocai Yu, Jian Deng, Lijia Feng, Linzhi Wu
Summary: This paper studies the effect of surface treatment methods on the surface bonding strength of CFRP plates and demonstrates that surface microprinting technology (SMT) is an effective method. A mechanical model of CFRP honeycomb structure is established, and the theoretical formula for shear strength is deduced. The experimental results show that SMT can greatly improve the shear strength of CFRP honeycomb sandwich structure and provide technical database and guidelines for its application in the aerospace and aeronautical fields.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Liming Xu, Deng'an Cai, Zhiming Xu, Mizhi Jia, Kun Wang, Nan Lin, Guangming Zhou
Summary: A new circular frangible composite cover with a one-way locking function was designed and fabricated. The cover showed a high ratio of external to internal load-bearing limit and its performance was better than two types of covers reported in literature.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Mathematics, Applied
Jian Deng, Guangming Zhou, Xinwei Wang
Summary: This paper proposes a simple method to improve the overall performance of the four-node plane stress element and provides numerical examples to demonstrate its effectiveness. By properly selecting integration points, the problem of mesh size dependence can be overcome to a certain degree.
APPLIED MATHEMATICS LETTERS
(2023)
Article
Engineering, Civil
Ang Peng, Jian Deng, Deng'an Cai, Tao Ren, Dake Wu, Guangming Zhou, Xinwei Wang
Summary: The impact location has a significant influence on the damage behavior and residual performance of composite stiffened panels. The study shows that impact at the skin center has little effect on residual performance, while impact at the flange tip leads to early buckling and compression failure of the local skin.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Composites
Zhang Qi, Deng'an Cai, Nan Zhang, Ling Long, Guangming Zhou
Summary: This study investigates the mechanical properties and failure mechanisms of composites made of plain woven fabrics reinforced with carbon fibers, aramid fibers, and their intralayer hybrids. Tension, compression, and shear tests were performed to assess the properties of these composites. Digital image correlation technology and strain rosettes were used to obtain accurate strain data. A multi-scale modeling strategy was developed and validated, and the information obtained can be used for subsequent research and designing new high-performance composites and structures.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Materials Science, Composites
Liming Xu, Deng'an Cai, Mizhi Jia, Zhiming Xu, Nan Lin, Guangming Zhou
Summary: A new composite cover is designed and analyzed experimentally and numerically to meet the strict new feature requirements for no-throwing parts and self-closing under bursting condition. The cover can be broken into 4 split subparts from the center to the flange by the warhead bursting, and can automatically rebound and close after the missile is out of the launch container. The numerical results are in good agreement with the experimental data, and the influence of structural parameters on deformation and bursting failure load is investigated.
APPLIED COMPOSITE MATERIALS
(2023)
Article
Materials Science, Textiles
Mingyang Shao, Deng'an Cai, Nan Zhang, Qihang Yu, Fangtian Hu, Ning Kuang, Guangming Zhou
Summary: This paper investigates the properties of a new double-side-loop 2D woven laminated composite (DWLC), and finds that adding loop warp yarns can greatly improve the interlayer properties of the composite material, leading to superior performance under flexural, shear and impact loads.
FIBERS AND POLYMERS
(2023)
Article
Engineering, Mechanical
Nan Zhang, Guangming Zhou, Xiumei Guo, Shanyong Xuan, Disheng Wei, Xiaopei Wang, Deng 'an Cai
Summary: The impact resistance of carbon fiber/resin composite laminates was experimentally investigated in this paper. The main failure modes during high-velocity impact were fiber shear failure and tension failure. Under oblique impact at a velocity of 300 m/s, the fiber tension failure and matrix compression failure were more severe compared to normal impact, resulting in larger energy absorption of laminates. The research results can provide reference for the residual strength of laminates after impact at different positions in practical situations.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
Dake Wu, Xiaolei Gu, Ang Peng, Jian Deng, Deng'an Cai, Guangming Zhou, Xinwei Wang
Summary: This paper investigates the mechanical behavior of asymmetric sandwich panels (ASPs) under compression through experimental and numerical methods. The presence of a tapered region significantly affects stress distribution and failure initiations. The results provide a reference for the optimal design of ASPs.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Engineering, Civil
Ang Peng, Jian Deng, Dake Wu, Nan Zhang, Yingjiang Guo, Deng 'an Cai, Guangming Zhou, Xinwei Wang
Summary: This study systematically investigates the influence of impact energy and structural parameters on the damage behavior and failure mechanism of large in-plane composite sandwich structures under localized impact. Experimental tests and finite element modeling are conducted to predict impact responses, failure patterns, and energy absorption. The results indicate that localized structural damage behavior varies with impact energy, foam-core height, and impact angle, while stacking sequences of facesheet have little effect on the impact resistance of the sandwich panel.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Physical
Hang Zhang, Xiaopei Wang, Zhenhan Guo, Yuan Qian, Yan Shang, Deng'an Cai
Summary: This study examines the delamination damage characteristics and laws of glass fiber-reinforced composite honeycomb sandwich structures under different impact energies. Results show that as the impact energy increases, the damage area and extent of delamination also increase. The study also explores repair techniques and process parameters for the delamination damage, with significant improvements observed in the strength recovery rates of the sandwich panels after repair.
