解矩阵方法用于计算无形固体的局部机械性质
Jörg Rottler1, Céline Ruscher2, Peter Sollich3
1Department of Physics and Astronomy and Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
The Journal of chemical physics
|December 1, 2023
概括
这项研究引入了一种新方法,可以使用外部场来精确控制无形固体中的塑性变形. 这允许准确地绘制当地的塑料产量应力,并改进材料行为的预测.
科学领域:
- 计算材料科学 计算材料科学
- 固体机械学 固体机械学
- 非线性动力学是一种非线性动力学.
背景情况:
- 无形固体表现出复杂的塑性行为.
- 像"冷矩阵"方法这样的先前方法在准确捕捉局部机械性能方面存在局限性.
- 了解局部塑料变形对于预测材料故障至关重要.
研究的目的:
- 在粒子模拟中开发一种用于计算局部变化的非线性机械性质的新方法.
- 为了能够精确地定位无形固体中的塑性变形.
- 改进从结构信息中预测塑料重排的方法.
主要方法:
- 引入一个外部场来惩罚非非因位移,从而抑制在探测区域之外的塑料重新排列.
- 通过增加外部场的强度来定位塑性变形.
- 塑料产量局部应力分布的表征和塑料活动的空间映射.
主要成果:
- 通过控制外部电场强度来定位塑料变形的能力.
- 描述了当地的塑料产量压力的分布.
- 在2D无形固体模型中评估了收益应力和塑料活动的空间图之间的相关性.
- 减少了与"冷矩阵"方法相关的文物.
结论:
- 提出的方法允许计算无形固体中局部变化的非线性机械性质.
- 该方法通过提高局部应力和活动映射的准确性来提高塑料重排的预测.
- 这种技术提供了更精细的理解塑料变形在无序的材料.
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