轴承材料弹塑性损伤本构模型的研究

Study on Elastoplastic Damage Constitutive Model of Bearing Material

为了准确描述往复载荷下轴承材料的特性,利用Lemaitre损伤理论,将损伤耦合到本构方程中,建立了能较好模拟轴承材料性能的耦合损伤本构模型。利用完全隐式返回映射算法求解本构方程,并推导出与本构方程相对应的一致性切线刚度矩阵。运用有限元分析软件ABAQUS对用户子程序接口UMAT进行二次开发,利用FORTRAN编程语言编写了耦合损伤本构模型的子程序。最后通过算例,对模型和程序进行了验证。结果表明建立的本构模型可以正确地模拟轴承材料的塑性变形。

In order to accurately describe reciprocating load characteristics of the material by using constitutive model,using the theory of Lemaitre damage,The damage coupled to the constitutive equations,to establish a good coupling simulation of material properties of the damage constitutive model. By using the implicit return mapping algorithm and deduce the constitutive equation and constitutive equation corresponding to the consistent tangent stiffness matrix. Using the finite element analysis software ABAQUS to user subroutine UMAT interface for secondary development write the coupling damage constitutive model of the program. Finally by an example,to verify the correctness of the model and program. Results show that the constitutive model can establish the correct simulation of the material mechanics performance.