A STOCHASTIC-MODEL FOR CONTINUUM ELASTOPLASTIC BEHAVIOR .1. NUMERICAL APPROACH AND STRAIN LOCALIZATION
A STOCHASTIC-MODEL FOR CONTINUUM ELASTOPLASTIC BEHAVIOR .1. NUMERICAL APPROACH AND STRAIN LOCALIZATION
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DOI：
10.1088/0965-0393/2/2/001
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发表时间：
1994-03-01
影响因子：
1.8
通讯作者：
ARGON, AS
中科院分区：
文献类型：
--
作者：
BULATOV, VV;ARGON, AS
提出了一个二维模型，其中塑性流动被视为局部非弹性变换的随机序列。在这个模型中，内部的弹性应力，从这种非弹性转换，明确的金额，并在任意温度和载荷条件下的塑性流动的数值模拟开发了一个有效的计算机代码。从扩散高温流到良好局部化低温流的过渡是模型的自然结果。各种动力学和结构方面的塑性在不同温度下的模型二维固体进行了讨论。所开发的模型主要是起爆控制，并代表了非晶介质的属性。它与涉及位错滑移的迁移率控制塑性不同。然而，在其表现形式中，这种区别变得模糊。
A 2D model, in which plastic flow is treated as a stochastic sequence of local inelastic transformations, is proposed. In this model internal elastic stresses, resulting from such inelastic transformations, are explicitly amounted for, and an effective computer code for numerical simulation of plastic flow at arbitrary temperature and loading conditions is developed. The transition from diffuse high-temperature flow to well localized low-temperature flow is a natural result of the model. Various kinetic and structural aspects of plasticity in the model 2D solid at different temperatures are discussed. The model that is developed is primarily initiation controlled, and represents well the properties of amorphous media. It is to be distinguished from mobility-controlled plasticity involving dislocation glide. In its manifestations, however, the distinction becomes blurred.