Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite

doi:10.3390/ma15238577

IMECH-IR > 非线性力学国家重点实验室

	Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite
	Liu, Liangbao 1; Zhang, Xiaohui 2; Wang ZB(王子标)3; Wang, Yana 4,5; Guo, Jiangzhen 2
通讯作者	Zhang, Xiaohui(xiaohuizhang@buaa.edu.cn) ; Guo, Jiangzhen(jzguo@buaa.edu.cn)
发表期刊	MATERIALS
	2022-12-01
卷号	15 期号:23 页码:14
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.
关键词	unidirectional fiber-reinforced composites transverse strength prediction micromechanics modeling stress concentration factor stress field in matrix
DOI	10.3390/ma15238577
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000896126300001
关键词[WOS]	FIBER-REINFORCED COMPOSITES ; POLYMER COMPOSITES ; FAILURE ; COMPRESSION ; CRITERIA ; MATRIX
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
资助项目	National Natural Science Foundation of China ; [51905021]
项目资助者	National Natural Science Foundation of China
论文分区	二类/Q1
力学所作者排名	3+
RpAuthor	Zhang, Xiaohui ; Guo, Jiangzhen
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91223
专题	非线性力学国家重点实验室
作者单位	1.Beihang Univ, Res Inst Aero Engn, Beijing 100191, Peoples R China; 2.Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Engn Med, Beijing 100191, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 4.AECC Beijing Inst Aeronaut Mat, Surface Engn Div, Beijing 100095, Peoples R China; 5.AECC Beijing Inst Aeronaut Mat, Key Lab Adv Composites, Beijing 100095, Peoples R China
推荐引用方式 GB/T 7714	Liu, Liangbao,Zhang, Xiaohui,Wang ZB,et al. Micromechanics Modeling of Transverse Tensile Strength for Unidirectional CFRP Composite[J]. MATERIALS,2022,15,23,:14.
APA	Liu, Liangbao,Zhang, Xiaohui,王子标,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.

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