探索粗线接触中粘弹性粘附的动态
Luciano Afferrante1, Guido Violano2, Giuseppe Carbone1
1Department of Mechanics, Mathematics and Management, Polytechnic University of Bari, Via E. Orabona, 4, 70125, Bari, Italy.
Scientific reports
|September 12, 2023
概括
这项研究模拟了粗,粘性弹性表面之间的粘附. 粘性效应减少不稳定性,拉开应力取决于材料特性和加载速度,影响粘合动力学.
科学领域:
- 接触力学 接触力学 联系力学
- 材料科学 材料科学 材料科学
- 表面物理 表面物理
背景情况:
- 对粘性弹性粗表面的粘附度进行建模是一个重大挑战.
- 现有的模型往往简化了表面地形或材料行为,限制了适用性.
- 粗度和粘性弹性之间的相互作用导致复杂的,取决于速率的粘合动态.
研究的目的:
- 开发和应用一个数值模型来研究随机粗型材和粘弹性材料之间的粘附.
- 分析粘性效应和表面粗度对粘合现象的影响.
- 探索拉开应力,材料特性和加载条件之间的关系.
主要方法:
- 在数值模拟中使用有限元方法.
- 在受控移位条件下进行了接近-撤回模拟.
- 研究了随机粗的形状与粘性弹性半平面的粘合动力学.
主要成果:
- 发现粘性效应可以在表面接近和收缩过程中减轻粗性引起的不稳定性.
- 拉开应力,即脱离所需的力,取决于刚度模和最大接近负载,即使粘性效应可以忽略不计.
- 粘附歇斯底里和拉开应力表现出单调的增长速度,当从放松状态下卸载时.
- 在收缩从未放松的状态开始时,在中间速度发生最大的拉开应力和歇斯底里性损失.
结论:
- 开发的数值模型有效地捕捉了粘弹性粗表面的复杂粘附行为.
- 粘性弹性在稳定粗表面和影响粘附结果方面发挥着至关重要的作用.
- 粘附动态,包括拉开应力和歇斯底里,对加载历史和速度敏感,为材料脱离过程提供了洞察力.
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