理化检验-物理分册2026，Vol.62Issue(5)：23-25,30,4.DOI:10.11973/lhjy-wl250292
不同梯度对增K法疲劳裂纹扩展速率试验的影响
The influence of different gradients on the fatigue crack growth rate test of increasing-K method
唐玉龙 1宋文城 1王丹 1李延朋 1史丹丹 1霍光阳1
作者信息
- 1. 航鑫材料科技有限公司,龙口 265713||国家铝合金压力加工工程技术研究中心,龙口 265713
- 折叠
摘要
Abstract
In this study,7050-T7451 aluminum alloy plate was used as the research material,and M(T)specimens for crack growth were prepared.The crack growth stage in the fatigue crack growth rate test was carried out using the increasing-K method with different gradient values.The influence of different gradients on the crack growth stage in the fatigue crack growth rate test was recorded from the da/d N-ΔK curves.The results show that when the gradients during the crack growth stage were set at 0.04,0.06,and 0.08 respectively,the data-fitted curves indicated that different gradients had no significant effect on the fatigue crack growth rate.However,the test data revealed that a larger gradient corresponded to a higher test force and shorter fatigue cycles.In practical applications,when the test force and stroke of the equipment were sufficient,a larger gradient could shorten the test duration and significantly improve the test efficiency.关键词
7050-T7451铝合金/疲劳裂纹扩展速率/柔度法/梯度/da/dN-ΔK曲线Key words
7050-T7451 aluminum alloy/fatigue crack growth rate/compliance method/gradient/da/d N-ΔK curve分类
矿业与冶金引用本文复制引用
唐玉龙,宋文城,王丹,李延朋,史丹丹,霍光阳..不同梯度对增K法疲劳裂纹扩展速率试验的影响[J].理化检验-物理分册,2026,62(5):23-25,30,4.
