In this work, a constitutive model of an intrinsically self-healing composite matrix material is presented. The developed model comprises a micro-damage initiation and evolution model, and a healing evolution model, which are combined with the von Mises linear isotropic hardening plasticity. It is implemented into the Abaqus/Standard user material subroutine UMAT and validated using experimental results of static tensile and two-cycle tensile tests performed on partially neutralised poly(ethylene-co-methacrylic acid) (EMAA) ionomer copolymer, Surlyn® 8940. In the development of the model, Continuum Damage Healing Mechanics (CDHM) concepts of nominal and healing configurations are used. In addition, these concepts are used along with the strain equivalence hypothesis to streamline the numerical implementation. The strain equivalence hypothesis relates strain and stress tensors in the nominal and the healing configuration. Finally, successful validation has shown that the developed model is able to accurately predict behaviour of Surlyn® 8940 coupons during tensile tests and it can precisely predict the accumulation of plastic strain.

在这项工作中，提出了一种本征自愈复合基体材料的本构模型。所开发的模型包括一个微损伤起始和演化模型，以及一个愈合演化模型，它们与 von Mises 线性各向同性硬化塑性相结合。它在 Abaqus/Standard 用户材料子程序 UMAT 中实施，并使用对部分中和的聚（乙烯-共-甲基丙烯酸）（EMAA）离聚物共聚物 Surlyn® 8940 进行的静态拉伸和两循环拉伸试验的实验结果进行验证。在模型的开发过程中，使用了标称和愈合配置的连续损伤愈合力学 (CDHM) 概念。此外，这些概念与应变等效假设一起使用以简化数值实现。应变等效假设将标称和愈合配置中的应变和应力张量相关联。最后，成功验证表明，开发的模型能够准确预测 Surlyn® 8940 试样在拉伸试验期间的行为，并且可以准确预测塑性应变的累积。