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A Cyclic Cohesive Crack Model Based on Bounding Surface Concept

机译：基于有界曲面概念的循环内聚裂纹模型

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摘要

Cohesive crack model (CCM) is essentially a type of non-linear fracture mechanics that can deal with large fracture process zones in inhomogeneous materials such as asphalt concrete (AC). CCM has been successfully used to model cracking under monotonic loading conditions. Its application to fatigue cracking is however limited due to the lack of well-developed mechanisms to account for progressive cracking damage caused cyclic loading. This paper incorporates the bounding surface concept into cohesive crack model and provides a systematic way for introducing hysteresis loop during loading and unloading into CCM. Model behaviors of the resulting cyclic CCM are then examined for reasonableness and flexibility.
机译：内聚裂纹模型（CCM）本质上是一种非线性断裂力学，可以处理非均质材料（如沥青混凝土（AC））中的较大断裂过程区域。 CCM已成功地用于对单调加载条件下的裂纹进行建模。然而，由于缺乏完善的机制来解释由循环载荷引起的渐进式裂纹损伤，因此其在疲劳裂纹中的应用受到了限制。本文将边界表面概念整合到粘性裂纹模型中，并为在CCM加载和卸载过程中引入磁滞回线提供了系统的方法。然后检查所得循环CCM的模型行为的合理性和灵活性。

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