黏弹性树脂基三维编织复合材料的变温松弛模量

Abstract

Abstract: Relaxation moduli of resin-based 3D braided composites under different temperatures are calculated using the homogenization method. Through an analysis of the calculated results, a hypothesis is proposed that the relaxation moduli of resin-based 3D braided composites have time-temperature equivalence, and the hypothesis is verified by numerical calculation. Based on the hypothesis, a general method is construsted for determining the relaxation moduli under variable temperatures from those under constant temperatures for resin-based 3D braided composites. The relaxation moduli under variable temperatures in the braiding direction are obtained by applying reasonable boundary conditions to the models, and the influence of temperature change ratio on the relaxation moduli is also studied. It is shown that for different temperature histories, the relaxation moduli of resin-based 3D braided composites are different, but the steady values tend to be the same; and the time for the relaxation moduli to reach the steady value can be significantly shortened when the temperature is increased rapidly.

CLC Number:

YUAN Xin, SUN Huiyu. Relaxation Modulus of Viscoelastic Resin-based 3D Braided Composites Under Variable Temperatures[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, (6): 1036-1043.

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Relaxation Modulus of Viscoelastic Resin-based 3D Braided Composites Under Variable Temperatures

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