NUMERICAL SIMULATION OF CURING RESIDUAL STRESS AND STRAIN OF COMPOSITE LAMINATES WITH TIME-DEPENDENT PHYSICAL PARAMETERS OF MATERIALS

Abstract

Abstract: Residual stress formed during the curing process of thermoset resin composites is an important factor affecting the quality of material. A three-dimensional model based on the time-dependent physical parameters of materials during the curing process of composites was established.It contains thermal-chemical, resin curing kinetic model, and the residual stress model. On the basis,the time-dependent properties of material performances during the curing process were introduced into multi-field coupled calculation model. According to the comparison with experiment data in reference, the reliability of the model was verified. Then, the curing residual stress and strain of composite laminates were numerically simulated, the change rule of the curing residual stress and strain of composite laminates was studied, and the effect of process parameters on the stress and strain was analyzed. Through the comparison with the strain of pre-preg test, the correctness was verified. And the results show that the model can simulate composite curing process. Temperature, volume fraction of resin, and ply angle have significant impact on laminates stress and strain, and the affect of volume fraction of the resin is the most significant among these factors.

Key words: composites, residual strain /stress, multi field coupling, physical property parameter, pre-preg

CLC Number:

TB332

HE Ji-lin, MENG Yuan-ming, WANG Te, WANG Xiao-fei. NUMERICAL SIMULATION OF CURING RESIDUAL STRESS AND STRAIN OF COMPOSITE LAMINATES WITH TIME-DEPENDENT PHYSICAL PARAMETERS OF MATERIALS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(5): 41-47.

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