交叉连接度的变化可以通过横向裂纹编程和控制软骨折
Miguel Angel Moreno-Mateos1, Paul Steinmann1,2
1Institute of Applied Mechanics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 5, 91058 Erlangen, Germany.
npj computational materials
|December 19, 2024
概括
软聚合物中的交叉连接程度会影响断裂行为,而更高的交叉连接会促进横向裂纹. 这项研究开发了一个模型来控制软材料中的断裂异构性,以提高性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物物理 聚合物物理
- 断裂力学 断裂力学 断裂力学
背景情况:
- 软材料的大型变形导致复杂的断裂行为,包括异构性.
- 断裂异质性,如横向裂,与微观结构变化和应变诱导的结晶有关.
- 交叉连接度对弹性体中断裂异性质的影响尚未完全理解.
研究的目的:
- 研究柔软弹性体中的交叉连接度和断裂异构性之间的关系.
- 探索控制从前向向侧向裂纹过渡的合成参数.
- 开发一个计算框架来预测软复合材料的断裂行为.
主要方法:
- 对Elastosil P7670具有不同度的交叉连接的实验性表征.
- 开发一种新的相场模型,用于结合依赖交叉连接的临界能量释放率的断裂.
- 复合软结构的计算模拟,具有不同的交联密度.
主要成果:
- 在Elastosil P7670中,横向裂纹的趋势随着交叉连接的程度而增加.
- 为了在前向和侧向断裂模式之间进行过渡,确定了特定的混合比率.
- 阶段场模型准确地预测复合结构中的断裂行为.
结论:
- 在软聚合物中,通过控制合成过程中的交叉连接度,可以有效调节折断异构性.
- 具有量身定制的交叉连接的复合软结构提供了增强的断裂耐受性和可调节的刚性.
- 开发的计算框架作为一个虚拟的测试台,用于设计具有优越断裂阻力的先进软材料.
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