Macromodeling of Crack Damage in Steel Beams Subjected to Nonstationary Low Cycle Fatigue
Macromodeling of Crack Damage in Steel Beams Subjected to Nonstationary Low Cycle Fatigue
复制标题
非平稳低周疲劳钢梁裂纹损伤的宏观建模
DOI：
10.1061/(asce)st.1943-541x.0001536
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发表时间：
2016-04
影响因子：
4.1
通讯作者：
Bai YT
中科院分区：
文献类型：
--
作者：
Bai Yongtao;Bai Yongtao;Kurata Masahiro;Florez-Lopez Julio;Nakashima Masayoshi;Florez-Lopez Julio;Bai YT
摘要本研究提出了超低周疲劳钢梁裂纹萌生和扩展的模型。该模型可以包含在集中损伤力学的总体框架中。每个塑性铰链都会引入一个称为损坏的状态变量，该变量可能与实际结构部件中裂纹的扩展有关。损伤演化定律基于 Manson-Coffin 定律、Palmgren-Miner 规则和两个新概念：瞬时塑性振幅和裂纹驱动变量。该模型还使用单边损伤假设来描述裂纹闭合效应。正如文献中报道的那样，它通过对承受恒定和可变振幅循环载荷的钢梁-柱连接试验的数值模拟进行了验证。讨论了该模型的优点和局限性，以使其更广泛地应用于承受机械过载（通常是地震载荷）的钢框架系统的损伤模拟。
AbstractThis study proposes a model of crack initiation and propagation in steel beams subjected to ultralow cycle fatigue. The model can be included in the general framework of lumped damage mechanics. A state variable called damage is introduced for each plastic hinge and can be related to the extension of the crack in the real structural component. The damage evolution law is based on the Manson–Coffin law, the Palmgren–Miner rule and two new concepts: the instantaneous plastic amplitude and a crack-driving variable. The model also describes crack closure effects using the unilateral damage assumption. It was validated by the numerical simulation of tests of steel beam-column connections subjected to cyclic loadings with constant and variable amplitudes, as reported in the literature. Advantages and limitations of the model are discussed for wider applications on the damage simulation of steel frame systems subjected to mechanical overloads, typically earthquake loading.
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影响因子：
4.1
作者：
F. Leckie
通讯作者：
F. Leckie
影响因子：
5.5
作者：
D. Amorim;S. Proença;J. Flórez-López
通讯作者：
D. Amorim;S. Proença;J. Flórez-López
影响因子：
6
作者：
Xue, Liang
通讯作者：
Xue, Liang
影响因子：
6
作者：
Hui Zhou;Yuanqing Wang;Yongjiu Shi;Jun Xiong;Lu Yang
通讯作者：
Hui Zhou;Yuanqing Wang;Yongjiu Shi;Jun Xiong;Lu Yang
影响因子：
4.1
作者：
B. W. Toellner;C. E. Watkins;E. K. Abbas;M. Eatherton
通讯作者：
B. W. Toellner;C. E. Watkins;E. K. Abbas;M. Eatherton