This article addresses the problem of the multiscale constitutive representation of the multiaxial inelastic behavior of elastomeric particulate composites. A fully three-dimensional model is proposed within a micromechanical treatment to describe the multiaxial inelastic response in relation to the reinforcement mechanisms. A network decomposition based on the tube confinement theory is used to consider the combined effects of multiaxiality and inelasticity. The near-field direct interactions between the particles and the rubber networks are physically described using the Eshelby inclusion theory. The capabilities of the microstructure-based model are evaluated for different modes of deformation over a wide range of filler concentrations. It is found being able to successfully reproduce the significant features of the multiaxial macro-response upon monotonic and cyclic loading sequences. Important insights about the effective role of the reinforcement mechanisms on the multiaxial dissipation are revealed.

本文解决了弹性颗粒复合材料多轴非弹性行为的多尺度本构表示问题。在微机械处理中提出了一个完全三维模型来描述与加固机制相关的多轴非弹性响应。基于管限制理论的网络分解用于考虑多轴性和非弹性的综合影响。颗粒和橡胶网络之间的近场直接相互作用使用 Eshelby 夹杂物理论进行物理描述。基于微观结构的模型的能力在广泛的填料浓度范围内针对不同的变形模式进行了评估。发现能够成功地再现多轴宏观响应对单调和循环加载序列的重要特征。揭示了关于增强机制对多轴耗散的有效作用的重要见解。