Low cycle fatigue of aluminum foam
Low cycle fatigue of aluminum foam
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DOI：
10.1016/j.msea.2008.10.045
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发表时间：
2009-03-25
期刊：
影响因子：
6.4
通讯作者：
Morrison, D. J.
中科院分区：
文献类型：
--
作者：
Ingraham, M. D.;DeMaria, C. J.;Morrison, D. J.
对闭孔泡沫铝的拉压疲劳行为和失效模式进行了实验研究。 Alporas 泡沫铝样本的平均相对密度为 8.7%，在 0.05% 至 0.5% 的标称总应变幅值下进行完全反向轴向疲劳。无论应变幅值如何，该材料都表现出最小的应变硬化，并且遵循应变幅值与疲劳寿命之间的科芬-曼森关系。通过数字图像相关生成的表面应变图表明压实辅助裂纹扩展是失效过程中的重要驱动力。 (C) 2008 Elsevier B.V. 保留所有权利。
An experimental investigation into the tension-compression fatigue behavior and failure mode of closed-cell aluminum foam was conducted. Alporas aluminum foam specimens, of 8.7% average relative density, were subjected to fully reversed axial fatigue at nominal total strain amplitudes ranging from 0.05% to 0.5%. The material exhibited minimal strain hardening, regardless of strain amplitude, and followed a Coffin-Manson relationship relating strain amplitude to fatigue life. Surface strain maps, generated through digital image correlation, suggest that compaction assisted crack propagation was an important driving force in the failure process. (C) 2008 Elsevier B.V. All rights reserved.