Experimental and numerical simulation of crack propagation evolution of PVDF membrane

doi:10.19936/j.cnki.2096-8000.20250828.006

Abstract

Abstract: The tearing resistance is very important to the safety of the membrane structure. In the present paper, uniaxial tensile test and numerical simulation were carried out to study the tearing behavior of PVDF membrane with initial slit. The numerical model of yarn and matrix microstructure was established using ANSYS LS-DYNA software, and the tearing process of membrane was analyzed under different slit angles and positions. The tearing strength and failure mode characteristics of the film were obtained, and the effects of different slit angles on the tearing properties of the textile were discussed. The results show that according to the different angle of slit, the section shaped like “a straight line” “Z” and “√” can be formed; under tearing test and numerical simulation, the slit expansion process of the film are identical, and the matrix breaks before the yarn. The error of the numerical simulation is less than 10% at different angles, which indicates that the finite element method can predict the tearing strength of the film well.

Key words: polyvinylidene fluoride membrane, crack propagation, uniaxial tensile test, explicit finite element analysis, composites

CLC Number:

TB332

LI Wenrui, LIU Ping, YIN Lingfang. Experimental and numerical simulation of crack propagation evolution of PVDF membrane[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(8): 43-53.

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