Multiscale numerical study of CFRP winding hydrogen storage cylinder based on asymptotic homogenization method

doi:10.19936/j.cnki.2096-8000.20240128.009

Abstract

Abstract: In order to simulate the complex structure and stress state of carbon fiber reinforced polymer (CFRP) wound layer in hydrogen storage cylinder, representative volume element (RVE) of composite layer was modeled, and the effective stiffness matrix of RVE was obtained based on the asymptotic homogenization (AH). The correctness of AH and the macroscopic effective parameters of simulated CFRP laminates is verified by tensile test. The parameters of winding layer were determined based on the grid theory, and the hoop winding layers adjacent to the lining were modeled microscopically, while the rest is seen as an RVE. Accordingly, the response of cylinder can be accurately predicted. The response of type Ⅳ cylinder with three CFRP winding modes under 70 MPa nominal pressure was studied by multiscale modeling. The results show that compared with the mesoscopic model, the maximum error of the fiber direction stress of the composite layer is 8.7%, and the maximum error of the Von-Mises stress of the lining is 2%, and the less the number of alternate winding, the smaller the error of the homogenized model is. The lay-up winding with separated hoop and helical layers may improve the burst pressure by 15% approximately.

Key words: composite hydrogen storage cylinder, asymptotic homogenization, netting theory, helical winding, stress distribution

CLC Number:

TB332

FENG Jun, ZHANG Nan, SONG Meili, CHEN Yang, ZHAO Xiaodong, LIANG Jianguo. Multiscale numerical study of CFRP winding hydrogen storage cylinder based on asymptotic homogenization method[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(1): 66-73.

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