Crack Initiation under Cyclic Compression
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG1989年第5期
论文作者：冯美斌 陈新增 何家文
文章页码：328 - 332
摘 要：<正> The crack initiation behaviour under cycliccompression foy the notched specimen wasinvestigated. It has been found that the cyclesfor crack initiation increase with the increaseof compressive mean stress, and the decreaseof stress amplitude. The stress amplitude playsa more important role than the mean stress does.Photoelastic coating and finite element methodswere employed to measure and calculate the stressfield in the notched part. The resul ts showthat the crack initiation under compressionis attributed to the tensile stress which mayexist during unloadtng. If the true stress statein the notch is compressive, no crack initiates.
冯美斌，陈新增，何家文
摘 要：<正> The crack initiation behaviour under cycliccompression foy the notched specimen wasinvestigated. It has been found that the cyclesfor crack initiation increase with the increaseof compressive mean stress, and the decreaseof stress amplitude. The stress amplitude playsa more important role than the mean stress does.Photoelastic coating and finite element methodswere employed to measure and calculate the stressfield in the notched part. The resul ts showthat the crack initiation under compressionis attributed to the tensile stress which mayexist during unloadtng. If the true stress statein the notch is compressive, no crack initiates.
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