统一模型用于湿度反应性材料的质性行为
Júlio O Amando de Barros1, Falk K Wittel1
1Institute for Building Materials, ETH Zurich, Leopold-Ruzicka-Weg 4, 8093 Zurich, Switzerland.
一种新的棒滑纤维捆绑模型解释了高反应性材料的行为. 它捕获湿度诱导的滑动菌株和故障,改善了对纤维素材料机械吸收效应的理解.
科学领域:
- 材料科学 材料科学 材料科学
- 材料机械学 材料机械学
- 统计物理 统计物理
背景情况:
- 响应湿度的材料表现出由水相互作用影响的复杂的结构性质关系.
- 现有的模型往往缺乏全面的物理基础来预测在不同负载下材料变形.
- 了解这些行为对于优化湿度响应材料的应用至关重要.
研究的目的:
- 为了引入一个增强的棒滑纤维捆绑模型,用于对湿度有反应的材料.
- 将依赖于水分的滑动应变和故障机制纳入统计框架.
- 为分析材料行为提供一个更有物理基础的模型.
主要方法:
- 开发了一种粘滑纤维捆绑模型,集成了依赖湿度的元素.
- 基于物理解释的滑动应变启动,放松和纤维故障的纳入规则.
- 在循环湿度和机械负荷条件下模拟材料行为.
主要成果:
- 该模型准确地捕捉了湿度周期期间的滑动应变积累,导致机械吸收行为.
- 在卸载负载时观察到滑动应变的部分放松,随后在随后的循环中进一步积累.
- 证明了模型在完整,损坏和失败的材料状态之间模拟过渡的能力.
结论:
- 改进后的模型提供了一个强大的框架来理解高反应性材料的行为.
- 它提供了关于湿度,负载和材料降解的相互作用的见解.
- 这项工作有助于更好地分析和预测高湿反应性材料的特性.
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