Article(id=1246023206134460484, tenantId=1146029695717560320, journalId=1241755870837649424, issueId=1246023204117005194, articleNumber=null, orderNo=null, doi=10.19636/j.cnki.cjsm42-1250/o3.2023.046, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1693324800000, receivedDateStr=2023-08-30, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1775004682334, onlineDateStr=2026-04-01, pubDate=1713974400000, pubDateStr=2024-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1775004682334, onlineIssueDateStr=2026-04-01, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1775004682334, creator=13701087609, updateTime=1775004682334, updator=13701087609, issue=Issue{id=1246023204117005194, tenantId=1146029695717560320, journalId=1241755870837649424, year='2024', volume='45', issue='2', pageStart='145', pageEnd='288', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1775004681852, creator=13701087609, updateTime=1775004747143, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1246023478026027853, tenantId=1146029695717560320, journalId=1241755870837649424, issueId=1246023204117005194, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1246023478026027854, tenantId=1146029695717560320, journalId=1241755870837649424, issueId=1246023204117005194, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=266, endPage=278, ext={EN=ArticleExt(id=1246023206432256070, articleId=1246023206134460484, tenantId=1146029695717560320, journalId=1241755870837649424, language=EN, title=Analysis of Plastic Zone at the Ⅰ/Ⅱ Composite Lip-shaped Crack Tip, columnId=1244229834482757770, journalTitle=Chinese Journal of Solid Mechanics, columnName=Research Paper, runingTitle=null, highlight=null, articleAbstract=
In this study, the angle-preserving transformation method is employed to establish a propagation model for I/II composite lip-shaped cracks under tensile loading conditions. Based on Irwin's small-scale yielding equivalent hypothesis, a plastic propagation zone model is formulated for Ⅰ-Ⅱ composite lip-shaped cracks under tensile loading. This model provides expressions for the stress intensity factors (SIFs) of mode I and mode II at the tip of lip-shaped cracks within the plastic zone. Additionally, the stress distribution along the extension line of the lip-shaped crack tip is characterized. A tensile simulation model is developed, and the theoretical solution for stress distribution at the lip-shaped crack tip is compared with the elastoplastic and linear elastic simulation results. It is found that, based on Irwin's small-scale yielding equivalent hypothesis, the modified dimensions of lip-shaped cracks lead to increased crack sizes and greater equivalent SIFs. Geometric alterations in lip-shaped crack parameters also influence the plastic zone, with larger semi-lengths resulting in larger plastic zones under equivalent width-to-length ratios. Conversely, greater width-to-length ratios lead to smaller plastic zones under equivalent semi-lengths. Moreover, an increase in the inclination angle of the lip-shaped crack corresponds to a proportional increase in the plastic zone size. The plastic correction theory at the lip-shaped crack tip, founded on the basis of Irwin's small-scale yielding equivalent hypothesis, aligns well with plastic finite element simulations. As the inclination angle of the lip-shaped crack rises, stress levels at the crack tip diminish. On the one hand, this phenomenon arises from the transition from mode I crack extension to Ⅰ-Ⅱ composite crack extension, coupled with stress yielding at the concave region of the lip-shaped crack for larger inclination angles. On the other hand, this stress yielding serves to mitigate stress concentration at the crack tip, ultimately resulting in reduced stress levels at the crack tip.
, correspAuthors=Xuelan Hu, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Jianliang Chen, Hong Zhang, Xuelan Hu, Xiangping Li, Yunbing Tang, Xiaohu Xie), CN=ArticleExt(id=1246023216104321421, articleId=1246023206134460484, tenantId=1146029695717560320, journalId=1241755870837649424, language=CN, title=Ⅰ-Ⅱ复合型唇形裂纹尖端塑性区分析, columnId=1241831201896469478, journalTitle=固体力学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
本文采用保角变换方法,建立了拉伸载荷下Ⅰ/Ⅱ复合型唇形裂纹的扩展模型,基于Irwin小屈服等效假设,建立了拉伸载荷下Ⅰ-Ⅱ复合型唇形裂纹尖端塑性扩展区模型,得到了唇形裂纹尖端塑性区Ⅰ型和Ⅱ型应力强度因子的表达式、基于该模型,进一步得到了唇形裂纹尖端延长线上的应力分布,并建立拉伸仿真模型,将唇形裂纹尖端应力分布理论解与弹塑性仿真解以及线弹性仿真解进行对比,研究结果表明:基于Irwin小屈服等效假设修正后的唇形裂纹尺寸会变大,唇形裂纹等效应力强度因子变大;唇形裂纹的形状参数的改变会对塑性区产生影响,相同宽长比情况下,半长越大,塑性区尺寸越大,相同半长情况下,宽长比越大,塑性区尺寸越小,且伴随唇形裂纹倾斜角越大,塑性区尺寸也会相应增加;基于Irwin小屈服等效假设的唇形裂纹尖端塑性修正理论与塑性有限元仿真具有较好的一致性,伴随唇形裂纹倾斜角增加,裂纹尖端的应力水平降低,一方面,这是由于裂纹扩展形式由Ⅰ型向Ⅰ-Ⅱ复合型的转变造成的影响,另一方面,对于大倾斜角情况下,唇形裂纹腹部出现应力屈服现象,对唇形裂纹裂纹尖端的应力集中产生分担的影响,造成裂纹尖端应力水平的降低.
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Stress intensity factors KⅠ and KⅡ vary with crack deflection angle γ, figureFileSmall=x7XSsLE+ZDeS15dL8iT0fw==, figureFileBig=CkEG/nsKx7ALW/TaG6d/QA==, tableContent=null), ArticleFig(id=1246023219514290739, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图3, caption=
应力强度因子KⅠ和KⅡ随裂纹倾斜角γ的变化, figureFileSmall=x7XSsLE+ZDeS15dL8iT0fw==, figureFileBig=CkEG/nsKx7ALW/TaG6d/QA==, tableContent=null), ArticleFig(id=1246023219627536952, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.4, caption=
Comparative analysis of stress intensity factors, figureFileSmall=lkUwH/4iYgcVi4H5w0RDJA==, figureFileBig=UjPyXFn6zGLsN+02eaoZxw==, tableContent=null), ArticleFig(id=1246023219736588861, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图4, caption=
应力强度因子对比分析, figureFileSmall=lkUwH/4iYgcVi4H5w0RDJA==, figureFileBig=UjPyXFn6zGLsN+02eaoZxw==, tableContent=null), ArticleFig(id=1246023219828863553, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.5, caption=
Influence of Poisson's ratio on the plastic zone at the crack tip, figureFileSmall=BWqVDQmOoOm1/nZJcnbkZA==, figureFileBig=YA7Kn2eM29w5MyQW+nCA4A==, tableContent=null), ArticleFig(id=1246023219921138243, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图5, caption=
泊松比对于裂纹尖端塑性区的影响, figureFileSmall=BWqVDQmOoOm1/nZJcnbkZA==, figureFileBig=YA7Kn2eM29w5MyQW+nCA4A==, tableContent=null), ArticleFig(id=1246023220017607240, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.6, caption=
Relationship between aspect ratio and plastic zone size for lip shaped cracks, figureFileSmall=wMQgtSH5p/kzj/absLHCAQ==, figureFileBig=WTleNd95kUO+6t34fD751w==, tableContent=null), ArticleFig(id=1246023220093104716, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图6, caption=
唇形裂纹不同半长情况下宽长比与塑性区长度关系, figureFileSmall=wMQgtSH5p/kzj/absLHCAQ==, figureFileBig=WTleNd95kUO+6t34fD751w==, tableContent=null), ArticleFig(id=1246023220176990800, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.7, caption=
Relationship between inclination angle and plastic zone size for lip shaped cracks, figureFileSmall=8UV7BTazsZ2jyl15ubOfbw==, figureFileBig=iKYRTtM+zg4v6RS3JpWUuA==, tableContent=null), ArticleFig(id=1246023220273459796, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图7, caption=
唇形裂纹塑性区长度与倾斜角关系, figureFileSmall=8UV7BTazsZ2jyl15ubOfbw==, figureFileBig=iKYRTtM+zg4v6RS3JpWUuA==, tableContent=null), ArticleFig(id=1246023220369928792, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.8, caption=
Schematic diagram of the finite element model of the lip-shaped crack, figureFileSmall=Wn7k+GXXiW0obdIloZil/Q==, figureFileBig=A1hOgCJkvtCCODhAcD3JtA==, tableContent=null), ArticleFig(id=1246023220453814877, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图8, caption=
唇形裂纹有限元模型示意图, figureFileSmall=Wn7k+GXXiW0obdIloZil/Q==, figureFileBig=A1hOgCJkvtCCODhAcD3JtA==, tableContent=null), ArticleFig(id=1246023220520923744, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.9, caption=
The normal stress distribution along the crack line, figureFileSmall=9OXLxiNcgqb7Nm46jYM66Q==, figureFileBig=kdoL2niTYiuX/UQl7l/Qog==, tableContent=null), ArticleFig(id=1246023220613198436, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图9, caption=
裂纹延长线上应力分布, figureFileSmall=9OXLxiNcgqb7Nm46jYM66Q==, figureFileBig=kdoL2niTYiuX/UQl7l/Qog==, tableContent=null), ArticleFig(id=1246023220701278823, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.10, caption=
The results of stress distribution on the extension line of cracks, figureFileSmall=XGdI3YmmpFc35w99Q9TmMg==, figureFileBig=bkiTLoRDMV1ApDMlUWlpQA==, tableContent=null), ArticleFig(id=1246023220772581994, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图10, caption=
裂纹延长线上应力分布结果, figureFileSmall=XGdI3YmmpFc35w99Q9TmMg==, figureFileBig=bkiTLoRDMV1ApDMlUWlpQA==, tableContent=null), ArticleFig(id=1246023220843885166, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.11, caption=
Elastic-plastic simulation of lip shaped cracks under different inclination angles, figureFileSmall=+IPtoF2qjGc7+D+KlYO1ng==, figureFileBig=fx5BUE91Q2y0G7zEKoWN5g==, tableContent=null), ArticleFig(id=1246023220915188337, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图11, caption=
不同倾斜角下唇形裂纹弹塑性仿真, figureFileSmall=+IPtoF2qjGc7+D+KlYO1ng==, figureFileBig=fx5BUE91Q2y0G7zEKoWN5g==, tableContent=null), ArticleFig(id=1246023221007463029, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.12, caption=
Yield cloud map of lip shaped cracks with 45° inclination angle, figureFileSmall=xAKyyti1viQTECPTyxPd3A==, figureFileBig=th6rwhg/u0CcsCdBYKtOwA==, tableContent=null), ArticleFig(id=1246023221082960506, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图12, caption=
45°倾斜角唇形裂纹屈服云图, figureFileSmall=xAKyyti1viQTECPTyxPd3A==, figureFileBig=th6rwhg/u0CcsCdBYKtOwA==, tableContent=null), ArticleFig(id=1246023221166846589, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Fig.13, caption=
Stress components σ22/σs at crack tips at various tilt angles, figureFileSmall=DCnWZYYTQRkZccJUv32p9Q==, figureFileBig=yuQ4cF4u+RM7ir1xkZEXpA==, tableContent=null), ArticleFig(id=1246023221238149760, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=图13, caption=
各倾斜角裂纹尖端应力分量σ22/σs, figureFileSmall=DCnWZYYTQRkZccJUv32p9Q==, figureFileBig=yuQ4cF4u+RM7ir1xkZEXpA==, tableContent=null), ArticleFig(id=1246023221305258628, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Table 1, caption=
Material parameter
, figureFileSmall=null, figureFileBig=null, tableContent=
| 材料属性 | 弹性模量E(GPa) | 泊松比ν | 屈服强度σs(MPa) |
|---|
| 理想弹塑性 | 101.2 | 0.34 | 800 |
), ArticleFig(id=1246023221368173191, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=表1, caption=
材料参数表
, figureFileSmall=null, figureFileBig=null, tableContent=
| 材料属性 | 弹性模量E(GPa) | 泊松比ν | 屈服强度σs(MPa) |
|---|
| 理想弹塑性 | 101.2 | 0.34 | 800 |
), ArticleFig(id=1246023221431087755, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=EN, label=Table 2, caption=
Theoretical and elastic-plastic simulation solutions under the length-to-thickness ratio of 0.4
, figureFileSmall=null, figureFileBig=null, tableContent=
| 唇形裂纹倾斜角γ(°) | 应力分量理论解 | 应力分量弹塑性仿真解 | 误差(%) |
|---|
| 0 | 0.58334 | 0.50066 | 14.17 |
| 15 | 0.59101 | 0.53579 | 9.34 |
| 30 | 0.59617 | 0.56884 | 4.58 |
| 45 | 0.61364 | 0.59116 | 3.66 |
), ArticleFig(id=1246023221506585230, tenantId=1146029695717560320, journalId=1241755870837649424, articleId=1246023206134460484, language=CN, label=表2, caption=
长度比为0.4情况下应力分量理论解与弹塑性仿真解
, figureFileSmall=null, figureFileBig=null, tableContent=
| 唇形裂纹倾斜角γ(°) | 应力分量理论解 | 应力分量弹塑性仿真解 | 误差(%) |
|---|
| 0 | 0.58334 | 0.50066 | 14.17 |
| 15 | 0.59101 | 0.53579 | 9.34 |
| 30 | 0.59617 | 0.56884 | 4.58 |
| 45 | 0.61364 | 0.59116 | 3.66 |
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