Characterization crack growth behavior in creep-fatigue loading conditions through different specimen geometries
Characterization crack growth behavior in creep-fatigue loading conditions through different specimen geometries
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通过不同的试样几何形状表征蠕变疲劳载荷条件下的裂纹扩展行为
DOI：
10.1016/j.ijmecsci.2018.07.020
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发表时间：
2018-09
影响因子：
7.3
通讯作者：
Jing Hongyang
中科院分区：
文献类型：
--
作者：
Zhao Lei;Xu Lianyong;Gao Zhifang;Han Yongdian;Jing Hongyang
Creep-fatigue interaction would accelerate crack growth behavior and change crack growth mode, which is different from that presenting in pure creep or fatigue regimes. In addition, the constraint ahead of crack tip affects the relationship between crack growth rate and fracture mechanics parameter and thus influences the accuracy of the life prediction for defected high-temperature components. For the aim of revealing the role of various specimen geometries in the creep-fatigue regimes, crack growth behaviors were investigated using five different types of cracked specimens (including C-ring in tension CST, compact tension CT, single notch tension SENT, single notch bend SENB, middle tension MT). The crack growth and damage evolution were simulated using finite element method coupled with a non-linear creep-fatigue interaction damage model. Moreover, the solutions of (Ct)avgfor different specimen geometries were given to expand the range of testing specimens. By analysing crack growth behavior with various specimen geometries under creep-fatigue conditions, CT and CST showed the highest crack growth rates, which were eight times as the lowest crack growth rates in MT. This revealed that distinctions in specimen geometry influenced the in-plane constraint level ahead of crack tip. Furthermore, a load-independent constraint parameterQ* was introduced to correlate the crack growth rate. The sequence of crack growth rate at a given value of (Ct)avgwas same to the reduction ofQ*. A normalized constraint level was employed to correlate with the normalized crack growth rate for the aim of transferring lab results into engineering issues.
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影响因子：
5.4
作者：
P. Sun;G. Wang;F. Xuan;S. Tu;Z. D. Wang
通讯作者：
P. Sun;G. Wang;F. Xuan;S. Tu;Z. D. Wang
影响因子：
26.6
作者：
J. Goodman
通讯作者：
J. Goodman
使用与载荷无关的约束参数 Q 量化蠕变裂纹尖端约束效应
影响因子：
7.3
作者：
Xu Lianyong;Zhang Xingfu;Zhao Lei;Han Yongdian;Jing Hongyang;Xu Lianyong;Zhang Xingfu;Zhao Lei;Han Yongdian;Jing Hongyang;Zhao L
通讯作者：
Zhao L
DOI：
10.1016/j.msea.2003.09.014
发表时间：
2004-01
影响因子：
6.4
作者：
K. Nikbin
通讯作者：
K. Nikbin
DOI：
10.1115/pvp2015-45222
发表时间：
2015-07
期刊：
--
影响因子：
--
作者：
P. Kapadia;C. Davies;D. Dean;K. Nikbin
通讯作者：
P. Kapadia;C. Davies;D. Dean;K. Nikbin