承载面积对金属橡胶材料本构关系的影响

Effect of Loaded Area on Constitutive Relation of Metal-Rubber

通过对空心圆柱形金属橡胶材料试件做静态试验并对试验数据进行拟合,得到了非线性本构关系模型中各系数与材料承载面积的变化关系式,从而实现了对金属橡胶材料在密度和高度一定、承载面积发生变化情况下的非线性本构关系的预估。算例验证表明,运用金属橡胶材料非线性本构关系的各系数和材料承载面积的关系式,可较为准确地预估材料的非线性本构关系。

According to nonlinear constitutive relation based on the porous material theory,static experiments for hollow cylinders of metal-rubber were conducted and the data were fitted.The relationship between every coefficient in the nonlinear constitutive relation and the loaded area was obtained.The effect of loaded area on nonlinear constitutive relation of metal-rubber was analyzed,and prediction for nonlinear constitutive relation of metal-rubber was achieved on condition that the density and the height were given and the loaded area was varied.A case shows that the relationship between coefficients in the nonlinear constitutive relation of metal-rubber and loaded area can predict the nonlinear constitutive relation correctly,and thus the nonlinear constitutive relation of metal-rubber with known heights and unknown loaded areas is predicted.The results show that the method is effective.