{"title":"循环载荷下单晶钛裂纹扩展行为的分子动力学研究","authors":"Le Chang, Dalin Zheng, Hongpeng Xie, Xinran Liu, Jinling Zhao, Changyu Zhou","doi":"10.1111/ffe.14534","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>In this study, molecular dynamics (MD) simulations were employed to investigate the crack propagation behavior of single-crystal titanium with various crystal orientations under cyclic loading. The analysis demonstrates that each crack model displays temporary cyclic hardening and predominant cyclic softening characteristics. The orientation of crack propagation primarily impacts the characteristics of the softening stage, with less influence on the initial hardening stage. A notable orientation correlation is evident in the mechanism of crack propagation, characterized by the presence of various slip modes and deformation twinning (DT) systems. The crack tip deformation behavior obtained from the simulation aligns with the theoretical predictions of linear elastic fracture mechanics (LEFM). The crack growth rate (CGR) and Δ<i>J</i> for different crack models show good correlation, and both the crack propagation direction and crack plane orientation affect the characteristics of the Δ<i>J</i>–<i>da</i>/<i>dN</i> curves.</p>\n </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 3","pages":"1050-1065"},"PeriodicalIF":3.1000,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Crack Propagation Behavior of Single-Crystal Titanium Under Cyclic Loading: A Molecular Dynamics Study\",\"authors\":\"Le Chang, Dalin Zheng, Hongpeng Xie, Xinran Liu, Jinling Zhao, Changyu Zhou\",\"doi\":\"10.1111/ffe.14534\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>In this study, molecular dynamics (MD) simulations were employed to investigate the crack propagation behavior of single-crystal titanium with various crystal orientations under cyclic loading. The analysis demonstrates that each crack model displays temporary cyclic hardening and predominant cyclic softening characteristics. The orientation of crack propagation primarily impacts the characteristics of the softening stage, with less influence on the initial hardening stage. A notable orientation correlation is evident in the mechanism of crack propagation, characterized by the presence of various slip modes and deformation twinning (DT) systems. The crack tip deformation behavior obtained from the simulation aligns with the theoretical predictions of linear elastic fracture mechanics (LEFM). The crack growth rate (CGR) and Δ<i>J</i> for different crack models show good correlation, and both the crack propagation direction and crack plane orientation affect the characteristics of the Δ<i>J</i>–<i>da</i>/<i>dN</i> curves.</p>\\n </div>\",\"PeriodicalId\":12298,\"journal\":{\"name\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"volume\":\"48 3\",\"pages\":\"1050-1065\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-12-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fatigue & Fracture of Engineering Materials & Structures\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14534\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fatigue & Fracture of Engineering Materials & Structures","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ffe.14534","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Crack Propagation Behavior of Single-Crystal Titanium Under Cyclic Loading: A Molecular Dynamics Study
In this study, molecular dynamics (MD) simulations were employed to investigate the crack propagation behavior of single-crystal titanium with various crystal orientations under cyclic loading. The analysis demonstrates that each crack model displays temporary cyclic hardening and predominant cyclic softening characteristics. The orientation of crack propagation primarily impacts the characteristics of the softening stage, with less influence on the initial hardening stage. A notable orientation correlation is evident in the mechanism of crack propagation, characterized by the presence of various slip modes and deformation twinning (DT) systems. The crack tip deformation behavior obtained from the simulation aligns with the theoretical predictions of linear elastic fracture mechanics (LEFM). The crack growth rate (CGR) and ΔJ for different crack models show good correlation, and both the crack propagation direction and crack plane orientation affect the characteristics of the ΔJ–da/dN curves.
期刊介绍：
Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
