Thickness effects of composite during curing process in different thermal environments

doi:10.19936/j.cnki.2096-8000.20220328.002

Abstract

Abstract: Three-dimensional unsteady finite element model and a numerical method for thermo-curing of resin matrix composite laminates were established by taking the time-dependent properties of materials into consideration in order to study the thickness effects on the thermo-curing process. And the validity of the mathematical model and calculation method was verified by the experimental results. The temperature, degree of cure and the residual stress in the laminates with different thicknesses under different thermal boundary conditions were numerically calculated. The effects of thickness parameters on the distributions of temperature and thermal stress in the laminates during curing as well as the curing time were studied. The results show that under the first and second types of thermal boundary conditions, with the increase of the thickness of the laminates, the maximum temperature and the residual stress in the laminates increase, while the curing time of the laminates is close. Under the third type of thermal boundary condition, with the increase of the thickness of the laminates in a certain range, the maximum temperature and the residual stress in the laminates increase, and the curing time of the laminates is prolonged. With the further increase of the thickness of the laminate, the curing time is shortened. For large thickness laminates considered in the article, compared with other two types of thermal boundary conditions, the application of the first type of thermal boundary conditions can not only greatly reduce the maximum temperature and residual stress in the laminates, but also shorten the curing time.

Key words: polymeric matrix composite, thermo-curing, thickness effects, curing time, stress

CLC Number:

TB332

CHEN Shu-xian, BAO Zheng-tao, ZHANG Xiao-long, YAN Deng-jie. Thickness effects of composite during curing process in different thermal environments[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(3): 15-23.

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