基于H-K固体模型的玻璃钢蠕变分析

Creep Analysis of GFRP Based on H-K Linear Solid Model

在对复合材料粘弹性力学理论进行研究的基础上,建立H-K线性固体蠕变本构模型。运用有限元理论,借助ABAQUS提供的用户材料子程序UMAT对H-K线性固体蠕变模型进行二次开发,对玻璃钢单向板单轴拉伸的蠕变性能进行仿真分析。通过拉伸蠕变加速实验拟合得出相关材料参数,将实验数据与理论模型、仿真模型的蠕变曲线进行对比验证。验证结果表明:理论与仿真模型的蠕变规律能较好地与实验数据吻合,材料本构模型可对玻璃钢长期性能进行仿真预测。

On the basis of the study of the viscoelastic theory of composite materials,the constitutive model of H-K linear solid creep is established.Using the finite element theory and the user material subroutine UMAT provided by ABAQUS,the H-K linear solid creep model was redeveloped,and the creep performance of GFRP uniaxial tensile was simulated and analyzed.Relevant material parameters were obtained by fitting the tensile creep acceleration experiment, and the creep curves of the theoretical model and simulation model were compared and verified.The results show that the creep law of the theoretical model and the simulation model is in good agreement with the experimental data,and the material constitutive model can predict the long-term performance of FRP.