Weight function method and its application for orthotropic single edge notched specimens

被引：15
作者：
Xu, W. [1 ]
Zhang, C. [1 ]
Wu, X. R. [2 ]
Yu, Y. [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Aerosp Struct Res Ctr, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China
[2] AECC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
来源：
COMPOSITE STRUCTURES | 2020年 / 252卷
关键词：
Weight function; Orthotropic strip; Stress intensity factor; Crack opening displacement; Fiber bridging; STRESS INTENSITY FACTORS; INTRALAMINAR FRACTURE-TOUGHNESS; LENGTH COLLINEAR CRACKS; FINITE-ELEMENT; COMPOSITE; INFINITE; STRIP; MODELS; DAMAGE;
D O I：
10.1016/j.compstruct.2020.112695
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The crack opening displacement-based weight function method (WFM) for isotropic material is extended to analyze crack in orthotropic material for the first time. Explicit weight function for an edge crack in an orthotropic strip is provided in this paper. After thorough verifications against results from finite element analyses (FEA) and existing literature data, the weight function is used to determine the stress intensity factors (SIF) and crack opening displacements (COD) for three-point bending, eccentrical point load and segment bridging stress. The results agree very well with those obtained from extensive FEAs and existing literature. The dependences of the SIF and crack mouth opening displacement (CMOD) on the material orthotropy are quantitatively determined. By comparisons to the SIF and CMOD for the edge cracked strip in isotropic material, it is found that the material orthotropy should not be ignored for some cases. The present weight function is highly accurate, efficient and versatile for calculating SIFs and CODs for edge cracks in orthotropic materials.
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页数：12
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