{"title":"自由表面对疲劳裂纹前沿奇异应力场的影响","authors":"T. Oplt, P. Pokorný, L. Náhlík, P. Hutař","doi":"10.1515/scjme-2017-0019","DOIUrl":null,"url":null,"abstract":"Abstract Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used to study dependence of the stress singularity exponent on Poisson’s ratio. Estimated values are compared to those already published. Experimentally measured angles of fatigue crack on SENB specimens confirm the relation between Poisson’s ratio and the angle between crack front and free surface.","PeriodicalId":35968,"journal":{"name":"Strojnicky Casopis","volume":" ","pages":"69 - 76"},"PeriodicalIF":0.0000,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/scjme-2017-0019","citationCount":"1","resultStr":"{\"title\":\"The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front\",\"authors\":\"T. Oplt, P. Pokorný, L. Náhlík, P. Hutař\",\"doi\":\"10.1515/scjme-2017-0019\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used to study dependence of the stress singularity exponent on Poisson’s ratio. Estimated values are compared to those already published. Experimentally measured angles of fatigue crack on SENB specimens confirm the relation between Poisson’s ratio and the angle between crack front and free surface.\",\"PeriodicalId\":35968,\"journal\":{\"name\":\"Strojnicky Casopis\",\"volume\":\" \",\"pages\":\"69 - 76\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1515/scjme-2017-0019\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Strojnicky Casopis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1515/scjme-2017-0019\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Strojnicky Casopis","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/scjme-2017-0019","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}
The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front
Abstract Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used to study dependence of the stress singularity exponent on Poisson’s ratio. Estimated values are compared to those already published. Experimentally measured angles of fatigue crack on SENB specimens confirm the relation between Poisson’s ratio and the angle between crack front and free surface.
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