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本文采用SHP B装置研究了聚碳酸酯和短玻璃纤维增强聚碳酸酯在10~(-4)～10~3/秒应变率范围和有限应变条件下的非线性粘弹性力学行为。根据Coleman和Noll的材料本构关系理论和本文实验结果,提出聚碳酸酯的本构方程 σ_m(e,(?))=E_0e+αe~2+βe~3+E_1 integral from n=0 to 1((?)·exp(-(t-τ)/θ_1)dτ)+E_2 integral from n=0 to 1((?)·exp(-(t-τ)/θ_2)dτ+η(?)) 并进而得到短纤维增强聚碳酸酯的一个相当简单的本构方程 σ_(frm)=φ·σ_m(e,(?)) 在加卸载全过程,两种本构方程的理论计算值都能满意地与实验结果相一致。
In this paper, the nonlinear viscoelastic behavior of polycarbonate and short glass fiber reinforced polycarbonate under 10 ~ (-4) ~ 10 ~ 3 / s strain rate range and finite strain was investigated by SHP B apparatus. According to the theory of material constitutive relation between Coleman and Noll and the experimental results in this paper, the constitutive equation of polycarbonate is proposed as σ_m (e, (?)) = E_0e + αe ~ 2 + βe ~ 3 + E_1 integral from n = 0 to 1 ((?) · Exp (- (t-τ) / θ_1) dτ) + E_2 integral from n = 0 to 1 ((?) · Exp (- t- τ) / θ_2) dτ + η And then get a fairly simple constitutive equation σ frm = φ · σ_m (e, (?)) Of short fiber reinforced polycarbonate in the entire process of loading and unloading, the theoretical calculations of the two constitutive equations are satisfactory The results are consistent with the experimental results.