EXPERIMENTAL AND NUMERICAL ANALYSIS OF BIAXIALLY TEARING PROPERTIES OF WARP-KNITTED FABRIC MEMBRANES

Abstract

Abstract: In practical engineering, biaxial tearing damage of fabric membranes is the main cause of membrane structures′ failure. And the tearing mechanical properties of fabric membranes are extremely important for the safety of membrane structures. In this paper, the biaxially tearing mechanical behaviors of warp-knitted fabric composite membranes are studied by experimental and numerical methods. A numerical model of biaxially tearing considering the micro-structure of yarns and matrix is established by ABAQUS software. And the tearing-failure process of the membranes under multi-stress ratio was analyzed. The tear strength and failure mode characteristics of the membranes were obtained, and the effect of stress ratio on tearing mechanical properties of membranes was discussed. The results show that the variation of stress state significantly affects the tearing failure mode, stress distributions, and tearing strength of the membranes. In the critical stress state, the greater the difference between the warp and weft stresses, the more obvious the stress concentration at the crack tip.

Key words: warp-knitted fabric membranes, biaxially tearing, numerical analysis, strength, stress ratio, composites

CLC Number:

TB332

GUAN Xiao-yu, CHEN Jian-wen, XIA Yu-fan, ZHANG Yang. EXPERIMENTAL AND NUMERICAL ANALYSIS OF BIAXIALLY TEARING PROPERTIES OF WARP-KNITTED FABRIC MEMBRANES[J]. Composites Science and Engineering, 2020, 0(7): 5-12.

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