{"title":"相变增韧陶瓷的有限裂纹","authors":"D.M. Stump, B. Budiansky","doi":"10.1016/0001-6160(89)90202-2","DOIUrl":null,"url":null,"abstract":"<div><p>The dependence of the tensile fracture stress on crack length in dilatationally phase-transforming ceramics is studied by modeling the evolution of the transformed regions around the tips of finite cracks during crack growth. The presence of the transformation is found to reduce the stress required for crack-growth <em>initiation</em>. However, the peak, or “ultimate”, tensile stress is found to occur during subsequent crack growth, and the <em>transformation-strengthening</em>, that is, the increase of tensile strength due to phase transformation, is found as a function of initial crack size.</p></div>","PeriodicalId":6969,"journal":{"name":"Acta Metallurgica","volume":"37 12","pages":"Pages 3297-3304"},"PeriodicalIF":0.0000,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0001-6160(89)90202-2","citationCount":"35","resultStr":"{\"title\":\"Finite cracks in transformation-toughened ceramics\",\"authors\":\"D.M. Stump, B. Budiansky\",\"doi\":\"10.1016/0001-6160(89)90202-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The dependence of the tensile fracture stress on crack length in dilatationally phase-transforming ceramics is studied by modeling the evolution of the transformed regions around the tips of finite cracks during crack growth. The presence of the transformation is found to reduce the stress required for crack-growth <em>initiation</em>. However, the peak, or “ultimate”, tensile stress is found to occur during subsequent crack growth, and the <em>transformation-strengthening</em>, that is, the increase of tensile strength due to phase transformation, is found as a function of initial crack size.</p></div>\",\"PeriodicalId\":6969,\"journal\":{\"name\":\"Acta Metallurgica\",\"volume\":\"37 12\",\"pages\":\"Pages 3297-3304\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1989-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0001-6160(89)90202-2\",\"citationCount\":\"35\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Metallurgica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0001616089902022\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Metallurgica","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0001616089902022","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Finite cracks in transformation-toughened ceramics
The dependence of the tensile fracture stress on crack length in dilatationally phase-transforming ceramics is studied by modeling the evolution of the transformed regions around the tips of finite cracks during crack growth. The presence of the transformation is found to reduce the stress required for crack-growth initiation. However, the peak, or “ultimate”, tensile stress is found to occur during subsequent crack growth, and the transformation-strengthening, that is, the increase of tensile strength due to phase transformation, is found as a function of initial crack size.
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