论文标题
应力梯度可塑性的热力学一致理论
A thermodynamically consistent theory of stress-gradient plasticity
论文作者
论文摘要
作为对尺寸依赖性塑料行为的应变梯度模型的扩展，这项工作提出了一个应力梯度理论的模型。该模型通过将其嵌入热力学一致的框架中嵌入到该主题的早期作品中。该开发是在单晶可塑性的背景下进行的，并利用热力学一致的模型，用于单晶常规和应变梯度可塑性。该模型的数值探索了包括面部居中的立方晶体的细线的扭转示例，其行为与基于最近的不平衡密度尺寸依赖性可塑性模型相比。
As an extension to strain-gradient models of size-dependent plastic behaviour, this work proposes a model for a stress-gradient theory. The model is distinguished from earlier works on the topic by its being embedded in a thermodynamically consistent framework. The development is carried out in the context of single-crystal plasticity, and draws on thermodynamically consistent models for single-crystal conventional and strain-gradient plasticity. The model is explored numerically using the example of torsion of a thin wire comprising a face centred cubic crystal, and its behaviour compared with that based on a recent disequilibrium density model of size-dependent plasticity.
