Mechanical examination of crack length dependency and material dependency on threshold stress intensity factor range with Dugdale model
Mechanical examination of crack length dependency and material dependency on threshold stress intensity factor range with Dugdale model
复制标题
DOI：
10.1016/j.engfracmech.2015.01.003
复制
发表时间：
2015-02
影响因子：
5.4
通讯作者：
N. Fukumura;Tomohiro Suzuki;S. Hamada;K. Tsuzaki;H. Noguchi
中科院分区：
文献类型：
--
作者：
N. Fukumura;Tomohiro Suzuki;S. Hamada;K. Tsuzaki;H. Noguchi
使用 Dugdale 模型进行塑性诱导裂纹闭合分析，在应力控制条件下分析计算阈值应力强度因子范围 ΔKth。在获得ΔKth之前，验证了该方法的准确性。通过指定小规模屈服（SSY）和大规模屈服（LSY）讨论了裂纹闭合行为的特征。利用Dugdale模型对ΔKth的分析结果进行了无量纲化的系统讨论。在 SSY 条件下，ΔKth 取决于杨氏模量和泊松比。在LSY条件下，当初始裂纹长度或屈服应变增加时，ΔKth增加。
The threshold stress intensity factor range ΔKthwas analytically calculated under stress control conditions using the plasticity-induced crack closure analysis with the Dugdale model. Before obtaining ΔKth, the accuracy of the method was verified. The characteristics of the crack closure behavior were discussed by specifying the small-scale yielding (SSY) and large-scale yielding (LSY). The analysis results of ΔKthwere discussed systematically by non-dimensionalizing them with the Dugdale model. Under the SSY condition, ΔKthwas dependent on Young’s modulus and Poisson’s ratio. Under the LSY condition, ΔKthincreased when the initial crack length or yield strain increased.