A review of crack closure measurement by compliance technique and the normalized-extended ASTM method as a currently most refined, practical and simple one
A review of crack closure measurement by compliance technique and the normalized-extended ASTM method as a currently most refined, practical and simple one
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柔顺技术和归一化扩展 ASTM 方法对裂纹闭合测量的回顾，作为目前最精致、实用和简单的方法
DOI：
10.1016/j.proeng.2010.03.084
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Y. I. Chung
中科院分区：
文献类型：
--
作者：
Ji;Y. I. Chung
介绍了ASTM标准柔度偏移法测定裂纹张开载荷的固有缺陷，提出了标准化扩展ASTM法作为替代方法，并将其应用于7475-T7351铝合金的随机加载试验。基于归一化扩展的ASTM方法确定的裂纹张开载荷的有效应力强度因子范围，成功地预测了随机载荷下的疲劳裂纹扩展。总之，强烈建议使用标准化扩展ASTM方法。研究还发现，7475-T7351铝合金在随机载荷下的裂纹闭合行为与2024-T351铝合金有显著差异。
The intrinsic drawbacks of the standard ASTM compliance offset method for determination of crack opening load is described and the normalized-extended ASTM method as an alternative is introduced and applied to random loading tests on 7475-T7351 aluminum alloy. Fatigue crack growth under random loading is successfully predicted by the effective stress intensity factor range based on the crack opening load determined by the normalized-extended ASTM method. Conclusively, it is strongly recommended to use the normalized-extended ASTM method. It is also found that the crack closure behavior of 7475-T7351 aluminum alloy under random loading is significantly different from that of 2024-T351.