Numerical modeling and optimisaition in thermo-stamping process of unidirectional fiber reinforced thermoplastic composites

doi:10.19936/j.cnki.2096-8000.20221028.031

Abstract

Abstract: Based on the ultra high molecular weight fiber reinforced polyurethane (UHMWPE/PUR) unidirectional (UD) tape prepreg, the simulation modeling, experimental verification and process optimization of thermo-stamping process were studied. Firstly, the mechanical behavior of unidirectional reinforced thermoplastic composites during thermo-stamping was described, and the thermal-rate dependent non-orthogonal hypoelastic in-plane shear constitutive model was established. The thermal dependent in-plane tensile properties were considered. The commercial finite element software ABAQUS was used to simulate hemispherical thermo-stamping. Based on the principal curvature method, the out-plane wrinkling of the simulation results were qualitatively and quantitatively evaluated by MATLAB. The relationship between the three main parameters (blank holder pressure, prepreg initial temperature and die temperature)and the amount of wrinkling in thermo-stamping process was studied. Aim for the minimum amount of out-plane wrinkling, the response surface method was used to optimize the thermo-stamping simulation, and the best process parameters of blank holder pressure, prepreg initial temperature and punch temperature were determined. The results show that the pressure of blank holder and the initial temperature of prepreg have a great influence on the wrinkling. The response surface method can accurately predict the optimal molding parameters.

Key words: thermoplastic composites, finite element analysis (FEA), unidirectional prepreg, response surface methodology (RSM), thermo-stamping process

CLC Number:

TB332

ZHANG Xuewen, WANG Jihui, CHEN Hongda, NI Aiqing. Numerical modeling and optimisaition in thermo-stamping process of unidirectional fiber reinforced thermoplastic composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(6): 104-114.

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