{"title":"塑性变形对低屈服强度材料及其焊接接头疲劳裂纹闭合行为的影响","authors":"Y. Mukai, M. Murata","doi":"10.2207/qjjws.9.423","DOIUrl":null,"url":null,"abstract":"Crack closure behavior in fatigue crack propagation process was induced by plastic deformation near crack. In the paper, the effect of plastic deformation on fatigue crack closure in low strength material and its welded joint was studied.The results are as follows. Crack closure would be caused by plastic deformation near crack surface. Generally, crack opening ratio in high yield strength material is higher than that in low yield one. This tendency based on the degree of deformation near crack surface. In addition, in welded joint, crack propagation rate was higher than mother metal, though crack opening ratio showed almost 1 by the effect of residual stress. This could be explained by the effect of restrain for plastic deformation, which was induced by existence of compresive stress field ahead of crack.","PeriodicalId":273687,"journal":{"name":"Transactions of the Japan Welding Society","volume":"56 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Plastic Deformation on Fatigue Crack Closure Behavior in Low Yield Strength Material and Its Welded Joint\",\"authors\":\"Y. Mukai, M. Murata\",\"doi\":\"10.2207/qjjws.9.423\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Crack closure behavior in fatigue crack propagation process was induced by plastic deformation near crack. In the paper, the effect of plastic deformation on fatigue crack closure in low strength material and its welded joint was studied.The results are as follows. Crack closure would be caused by plastic deformation near crack surface. Generally, crack opening ratio in high yield strength material is higher than that in low yield one. This tendency based on the degree of deformation near crack surface. In addition, in welded joint, crack propagation rate was higher than mother metal, though crack opening ratio showed almost 1 by the effect of residual stress. This could be explained by the effect of restrain for plastic deformation, which was induced by existence of compresive stress field ahead of crack.\",\"PeriodicalId\":273687,\"journal\":{\"name\":\"Transactions of the Japan Welding Society\",\"volume\":\"56 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transactions of the Japan Welding Society\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2207/qjjws.9.423\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of the Japan Welding Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2207/qjjws.9.423","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of Plastic Deformation on Fatigue Crack Closure Behavior in Low Yield Strength Material and Its Welded Joint
Crack closure behavior in fatigue crack propagation process was induced by plastic deformation near crack. In the paper, the effect of plastic deformation on fatigue crack closure in low strength material and its welded joint was studied.The results are as follows. Crack closure would be caused by plastic deformation near crack surface. Generally, crack opening ratio in high yield strength material is higher than that in low yield one. This tendency based on the degree of deformation near crack surface. In addition, in welded joint, crack propagation rate was higher than mother metal, though crack opening ratio showed almost 1 by the effect of residual stress. This could be explained by the effect of restrain for plastic deformation, which was induced by existence of compresive stress field ahead of crack.
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