Assessment of low cycle fatigue crack growth under mixed-mode loading conditions by using a cohesive zone model
Assessment of low cycle fatigue crack growth under mixed-mode loading conditions by using a cohesive zone model
复制标题
DOI：
10.1016/j.ijfatigue.2015.01.008
复制
发表时间：
2015-06-01
影响因子：
6
通讯作者：
Li, Xiao
中科院分区：
文献类型：
--
作者：
Li, Huan;Yuan, Huang;Li, Xiao
大多数黏结区模型只能模拟小尺度屈服条件下的疲劳裂纹扩展，不能很好地预测弹塑性疲劳裂纹扩展。本文提出了一种新的黏聚区模型，可以统一地描述疲劳裂纹扩展和弹塑性断裂。内聚模型的损伤累积既包含单调损伤，也包含循环损伤，并通过奥氏体不锈钢的混模断裂和疲劳试验进行了验证。计算结果表明，本文提出的黏结区模型可以对整个疲劳裂纹扩展过程提供统一的描述。(C) 2015 Elsevier Ltd.版权所有。
Most cohesive zone models were used to reproduce fatigue crack growth under small scale yielding and failed to predict elastic-plastic fatigue crack growth. In the present work a new cohesive zone model is introduced to give a uniform description of both fatigue crack growth and elastoplastic rupture. Damage accumulation of the cohesive model contains both monotonic damage as well as cyclic damage and validated by corresponding mixed-mode fracture and fatigue experiments of an austenitic stainless steel. Computations confirm that the present cohesive zone model may provide a uniform description for the whole fatigue crack growth regimes. (C) 2015 Elsevier Ltd. All rights reserved.