The stress transfer mechanism of nacre-like composites under off-axis tensile loading

被引：1

作者：

Jiang, Peng ^{[1
,2
]}

Xia, Guangming ^{[3
,4
]}

Bai, Shi ^{[3
,4
]}

Xu, Dongfang ^{[1
,2
]}

Qi, Jixiang ^{[1
,2
]}

Xiong, Xun ^{[1
,2
]}

Ren, Xianben ^{[1
,2
]}

Li, Ying ^{[1
,2
]}

机构：

[1] State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Beijing,100081, China

[2] Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing,100081, China

[3] China FAW-Beijing Institute of Technology Vehicle Innovative Protection Laboratory, Beijing,100081, China

[4] General R & D Institute of FAW, Changchun,130011, China

来源：

Acta Mechanica Sinica/Lixue Xuebao | 2025年 / 42卷 / 02期

基金：

中国博士后科学基金;

关键词：

Composites; Load transfer; Nacre; Bioinspired; Architected materials;

D O I：

10.1007/s10409-024-24547-x

中图分类号：

学科分类号：

摘要：

Nacre exhibits excellent mechanical properties attributed to the staggered alignment of inorganic minerals and bio-organic materials. This study aims to understand how stress transfers from macro-scale loading conditions to the staggered architecture, revealing multiple stress transfer modes in nacre-like composites under off-axis tensile loading conditions. We propose an innovative off-axis tension-shear chain model, which predicts the trend of the equivalent modulus. Systematic optimization reveals a counter-intuitive result: the equivalent modulus at a certain angle can be smaller than the equivalent moduli in both principal directions, and this phenomenon differs from the monotonic behavior commonly observed in continuous fiber composite materials. © The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag GmbH Germany, part of Springer Nature 2025.

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