短纤维增强橡胶材料的力学模型

在材料剪切滞后分析与随机顺序吸收法的基础上建立了短纤维增强橡胶材料(SFRC)的理论模型与有限元模型。通过简化将SFRC模型中的三维随机取向纤维降为二维取向,对短纤维增强阻尼材料的弹性模型进行计算与拟合。结果表明,随纤维体积分数的增大,SFRC的模量逐渐增加。当纤维体积分数为2.00%时,材料的弹性模量增加了约1倍,与试验值基本相符合。有限元分析结果与试验结果相吻合,表明该模型在进行SFRC的力学行为分析时具有一定的真实性。当材料应变在300%以内时,有限元模型可以对SFRC的力学行为进行比较准确的描述。

Model for short fibre reinforced rubber material

Theoretical model and finite element model of short fibre reinforced rubber material were established by shear lag analysis of material and random sequential absorption method.By simplifying,the two-dimensional oriented short fibre reinforced damping material model was established and elastic modulus of short fibre reinforced damping material was calculated and fitted.The results showed that modulus of the composite material increased gradually with increase of volume fraction of short fibre.When volume fraction of short fibre was 2.00%,elastic modulus of the materials doubled.It was basically consistent with the experimental result.And the results of finite element analysis also agreed well with the experimental results,which indicated that the model had certain authenticity in the analysis of mechanical behavior of short fibre reinforced materials.Finite element model could accurately describe mechanical behavior of short fibre reinforced material when the strain was within 300%.