Article
Materials Science, Composites
Jianlin Zhong, Changfang Zhao, Jie Ren, Xinxin Liu, Zhendong Zhang
Summary: There is a lack of constitutive models considering the initial non-linearity of fiber reinforced composites under compression. Through in-plane and out-of-plane compression experiments, the reasons for the initial non-linearity were identified and a nonlinear constitutive model was developed. The results showed that the stress-strain curves with linear and nonlinear models became consistent after the initial nonlinear stage, and the calculation results agreed well with the actual stress path.
APPLIED COMPOSITE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sajad Alimirzaei, Mehdi Ahmadi Najafabadi, Ali Nikbakht, Lotfollah Pahlavan
Summary: This study investigates the mechanical properties of filament wound composite tubes at +/-35 degrees and +/-55 degrees under axial compression loading using acoustic emission technique. The analysis shows that increasing the weaving angle of fibers leads to decreased separation of fibers from the matrix and increased percentage of matrix crushing and fiber failure.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2022)
Article
Materials Science, Composites
Lanxin Jiang, Jie Wang, Long Yang, Kunlan Huang, Zhen Liao, Shoune Xiao
Summary: In this study, two bimodulus constitutive models were proposed based on the track stress criterion and principal stress criterion. The bending performance of woven CFRP was analyzed, and the results showed that the bimodulus models can better represent the material properties with higher accuracy.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Characterization & Testing
Damijan Zorko, Joze Tavcar, Milan Bizjak, Roman Sturm, Zoran Bergant
Summary: The study investigated high cycle fatigue behavior of autoclave-cured carbon fiber-reinforced polymer (CFRP) composite gears, identifying epoxy matrix microcracking as the main mechanism leading to final delamination failure. CFRP gears showed significantly improved performance and longer fatigue lifespan compared to other materials.
Article
Engineering, Multidisciplinary
Yue Leng, Vahidullah Tac, Sarah Calve, Adrian B. Tepole
Summary: Biopolymer gels, such as fibrin and collagen, are widely used in tissue engineering and biomedical research. A fully connected neural network (FCNN) is proposed to efficiently capture the behavior of biopolymer gels. By training the FCNN on discrete fiber network data, this study offers a new approach for computational modeling of biological materials.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Materials Science, Textiles
Yu Zhou, Haitao Cui, Weidong Wen
Summary: This paper proposes a finite element model for investigating the mechanical behavior of 3D woven variable thickness composite plates. Experimental validation shows that the predicted stiffness decreases with increasing thickness.
FIBERS AND POLYMERS
(2022)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Chemical
Xia Zhou, Junlei Li, Chi Qu, Wenming Bu, Zifan Liu, Yafu Fan, George Bao
Summary: The study showed that the bending resistance of the hybrid PLA core/Mg alloy composite sandwich panel is better than that of the integrated PLA sandwich panel, and the sandwich structure with BCCV lattice cores has a better bending bearing capacity. The core configuration and core density have a coupling effect on the bending properties and failure modes of the hybrid sandwich panels.
JOURNAL OF ADHESION
(2022)
Article
Engineering, Multidisciplinary
Ehsan Shafiei, Mahdi Saed Kiasat, Ever J. Barbero
Summary: A micro-meso-scale (MMS) model is proposed to predict the rate-dependent behavior of woven fabric (WF) composite considering material nonlinearity and 3D geometrical nonuniformity. Experimental rate-dependent tests on the epoxy matrix and unidirectional composite are conducted to measure model constants, and the mechanical properties and nonlinearity of stress-strain curves of the WF composite are successfully predicted and compared to additional experimental tests.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Shuangbei Li, Quanfu Su, Xiangyu Wang, Yuan Wu, Xuan Zhao, Yanjun Chang
Summary: This paper proposes a H/V-JC/CS dynamic constitutive relation suitable for a wide range of strain rates, and calibrates the constitutive model parameters for metal materials. The research shows that the proposed model can well describe the mechanical behavior of metals under impact load and provides a high-precision analysis model for metal structures under dynamic load.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2022)
Article
Mechanics
Dong-Hyeop Kim, Sang-Woo Kim, In Lee
Summary: This study evaluates the deformation of plain woven composite structures induced by the curing process. The effective material property is calculated by considering fabric parameters closely related to the material properties. The theoretical models for predicting the cure behavior and effective material property are incorporated into finite element-based three-dimensional cure simulation. The results revealed the relationship between deformation and composite yarn thickness, as well as the gap between adjacent yarns. The process-induced deformation considering fabric parameters can contribute to improving the manufacturing quality of woven composite structures.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Shuyong Wang, Guoxin Chen, Pengcheng Song, Liyang Li
Summary: Based on elastic-plastic theory and generalized Hooke's law, considering the rate effect and random damage characteristics of cement-stabilized steel slag, this paper establishes an elastic-plastic dynamic damage constitutive model for cement-stabilized steel slag under complex stress state. The damage evolution equation is established using statistical theory and introducing the concepts of damage threshold and equivalent plastic strain. Taking into account the influence of pore water pressure, Terzaghi's effective stress principle is introduced and the effective stress expression is modified. The S-type dynamic strength criterion of cement-stabilized steel slag is established based on the existence of ultimate dynamic strength of brittle materials. The explicit integral stress return algorithm is derived through elastic-plastic theory, and the solving program is developed using the subroutine interface vectorized user defined material (VUMAT) provided by ABAQUS.
JOURNAL OF ENGINEERING MECHANICS
(2023)
Article
Forestry
Lipeng Zhang, Qifang Xie, Baozhuang Zhang, Long Wang, Jitao Yao
Summary: A novel 3D combined elastic-plastic damage constitutive model for wood is proposed in this study, which can effectively describe the behavior of wood under different loading conditions. The model was verified through a series of experiments to demonstrate its applicability.
Article
Engineering, Mechanical
Guowei Zhou, Qingping Sun, Dayong Li, Zhaoxu Meng, Yinghong Peng, Zhangxing Chen, Danielle Zeng, Xuming Su
Summary: This study investigates the mechanical properties and damage behaviors of carbon/epoxy woven fabric composite under in-plane tension and compression using experiment and simulation. Different material constitutive laws are established for the three components, showing significantly different mechanical properties and damage evolutions based on loading conditions and initial geometry characteristics. The study reveals that a non-linear stress-strain curve with clear transition region and intensive damage in tension, while a quasi-linear behavior up to facture is observed in compression with little damage prior to final fracture.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Vahidullah Tac, Vivek D. Sree, Manuel K. Rausch, Adrian B. Tepole
Summary: Deep neural networks are used in describing the mechanical behavior of soft tissues. They overcome the limitations of traditional constitutive models by predicting strain energy and its derivatives, and enforcing polyconvexity through physics-informed constraints. A multi-fidelity scheme combining experimental and analytical data yields the best performance.
ENGINEERING WITH COMPUTERS
(2022)
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)
