在异质接口附近的调负载重新分配和损坏
Christian Greff1,2, Paolo Moretti3,4, Michael Zaiser1,2
1Department of Materials Science, WW8-Materials Simulation, FAU Universität Erlangen-Nürnberg, Dr.-Mack-Straße 77, 90762, Fürth, Germany.
Scientific reports
|November 25, 2024
概括
具有层级微观结构的架构薄膜通过限制裂来防止接口故障. 这种设计提供了强大的断裂强度,而不会影响性能,与同位素材料不同.
科学领域:
- 材料科学 材料科学 材料科学
- 固体机械学 固体机械学
- 断裂力学 断裂力学 断裂力学
背景情况:
- 架构薄膜中的接口故障是对材料可靠性的关键问题.
- 异质基质在预测断裂行为方面引入了复杂性.
- 了解工程材料中的裂纹传播对于先进的应用是必不可少的.
研究的目的:
- 为了研究在异质基板上的模型架构薄膜的接口故障机制.
- 为了比较具有同位素和等级微观结构的材料之间的断裂行为.
- 开发一个理论框架,以理解层次材料中的故障限制.
主要方法:
- 架构薄膜和异质基板的建模.
- 对断裂力学和裂生长动态的分析.
- 网络的发展 格林的函数理论.
主要成果:
- 层次的微观结构将故障限制在特定的表面上,阻止裂的生长.
- 同otropic 材料通过粗的脱落前线获得断裂强度.
- 层次设计控制故障模式和位置,而不会影响性能 (峰值压力,故障工作).
结论:
- 层次的微结构为提高薄膜界面性提供了一个优秀的策略.
- 弹性相互作用内核的灭局部异构性是故障限制的关键.
- 这项研究为设计更有弹性的薄膜材料提供了洞察力.
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