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Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite

文献类型：期刊论文

作者Liu, Liangbao5; Zhang, Xiaohui4; Wang, Zibiao3; Wang, Yana1,2; Guo, Jiangzhen4
刊名MATERIALS
出版日期2022-12-01
卷号15期号:23页码:14
关键词unidirectional fiber-reinforced composites transverse strength prediction micromechanics modeling stress concentration factor stress field in matrix
DOI10.3390/ma15238577
通讯作者Zhang, Xiaohui(xiaohuizhang@buaa.edu.cn) ; Guo, Jiangzhen(jzguo@buaa.edu.cn)
英文摘要Transverse tensile strength of unidirectional (UD) composites plays a key role in overall failure of fiber-reinforced composites. To predict this strength by micromechanics, calculation of actual stress in constituent matrix is essentially required. However, traditional micromechanics models can only give the volume-averaged homogenized stress rather than an actual one for a matrix, which in practice will cause large errors. In this paper, considering the effect of stress concentration on a matrix, a novel micromechanics method was proposed to give an accurate calculation of the actual stress in the matrix for UD composite under transverse tension. A stress concentration factor for a matrix in transverse tensile direction is defined, using line-averaged pointwise stress (obtained from concentric cylinder assemblage model) divided by the homogenized quantity (obtained from a bridging model). The actual stress in matrix is then determined using applied external stress multiplied by the factor. Experimental validation on six UD carbon fiber-reinforced polymer (CFRP) specimens indicates that the predicted transverse tensile strength by the proposed method presents a minor deviation with an averaged relative error of 5.45% and thus is reasonable, contrary to the traditional method with an averaged relative error of 207.27%. Furthermore, the morphology of fracture section of the specimens was studied by scanning electron microscopy (SEM). It was observed that different scaled cracks appeared within the matrix, indicating that failure of a UD composite under transverse tension is mainly governed by matrix failure. Based on the proposed approach, the transverse tensile strength of a UD composite can be accurately predicted.
WOS关键词FIBER-REINFORCED COMPOSITES ; POLYMER COMPOSITES ; FAILURE ; COMPRESSION ; CRITERIA ; MATRIX
资助项目National Natural Science Foundation of China ; [51905021]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种英语
WOS记录号WOS:000896126300001
资助机构National Natural Science Foundation of China
源URL[http://dspace.imech.ac.cn/handle/311007/91222]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Zhang, Xiaohui; Guo, Jiangzhen
作者单位1.AECC Beijing Inst Aeronaut Mat, Key Lab Adv Composites, Beijing 100095, Peoples R China
2.AECC Beijing Inst Aeronaut Mat, Surface Engn Div, Beijing 100095, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
4.Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Engn Med, Beijing 100191, Peoples R China
5.Beihang Univ, Res Inst Aero Engn, Beijing 100191, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Liangbao,Zhang, Xiaohui,Wang, Zibiao,et al. Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite[J]. MATERIALS,2022,15(23):14.
APA Liu, Liangbao,Zhang, Xiaohui,Wang, Zibiao,Wang, Yana,&Guo, Jiangzhen.(2022).Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite.MATERIALS,15(23),14.
MLA Liu, Liangbao,et al."Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite".MATERIALS 15.23(2022):14.

入库方式： OAI收割

来源：力学研究所

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