Multi-scale elastic properties of 2.5D woven composites with void defects

被引：0

作者：

Wang, Wang ^{[1
]}

Shan, Zhongde ^{[1
]}

Sun, Zheng ^{[2
]}

Guo, Zitong ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Peoples R China

来源：

POLYMER COMPOSITES | 2025年 / 46卷 / 02期

基金：

中国国家自然科学基金;

关键词：

2.< fixed-case > 5D </fixed-case > woven composites; improved Halpin-Tsai semi-empirical model; mechanical properties; multi-scale analysis; voids; MECHANICAL-PROPERTIES; PORES;

D O I：

10.1002/pc.29038

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

2.5D woven composite material inevitably produces void defects in itsproduction process, which will seriously reduce its mechanical properties andreduce its service life. In this paper, the effects of void defects on the mechani-cal properties of 2.5D woven composites were studied by multi-scale analysis.An improved Halpin-Tsai semi-empirical model is proposed to calculate theelastic properties of yarns with porous defects and verified by finite elementmethod. A microscale representative volume unit (RVE) for predicting theelastic constants of composites with pore defects is established. Theoreticalanalysis and finite element analysis were used to verify the micro scale, andfinite element analysis and experiment were used to verify the micro scale.The effect of porosity on the elastic properties of micro-scale RVE was studiedin detail. The results show that the model is reasonable and accurate inpredicting the mechanical properties of yarns and composites. In addition, theeffect of porosity on the mechanical properties of 2.5D woven composites issignificant

引用

页码：1284 / 1300

页数：17

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