Comparison of constraint analyses with global and local approaches under uniaxial and biaxial loadings
文献类型：期刊论文
| 作者 | Qian GA(钱桂安) ; Cao YP; Niffenegger M; Chao YJ.; Wu WW
|
| 刊名 | EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 69页码:135-146 |
| 关键词 | Constraint Biaxial Loading Cruciform Specimen Local Approach To Fracture |
| ISSN号 | 0997-7538 |
| DOI | 10.1016/j.euromechsol.2017.12.006 |
| 文献子类 | Article |
| 英文摘要 | Fracture toughness is an important material property used to perform the integrity assessment of engineering components containing cracks. Due to the difference in crack tip constraint, specimens may show different fracture toughness. The constraint difference for cruciform specimen with shallow crack, compact tension (CT) specimen and three point bending specimen with shallow and deep cracks are investigated. Both linear elastic and elastic-plastic fracture mechanics are applied to study the constraint effect based on two-parameter fracture criterion. Crack tip constraint depends on the applied loading. J-A(2) method is used to precisely capture the crack tip constraint and crack tip stress distributions. Local approach to fracture can be applied to transfer the fracture toughness among different specimens under uniaxial and biaxial loadings. In case of positive T.,fre, T-stress increases with K-1. In the case of negative T-stress T-stress decreases with K1. Q(-stress) generally decreases with applied loading for both deep crack and shallow crack cases. Loss of constraint occurs for the single-edged bending (SEB) specimen with deep crack and thus raises the question whether the SEB specimen is proper to be used to obtain material toughness. For the cruciform bending (CRB) specimen, the constraint at the crack tip surface shows a least constraint while the deepest point has a relatively higher constraint. At a fracture probability of 10%, the fracture toughness difference between CT specimen and CRB specimen is about 50 MPa m(0.5), i.e 200% of the fracture toughness. This big difference demonstrates the importance of considering the constraint effects in the integrity analysis. |
| 分类号 | 一类 |
| WOS关键词 | PRESSURIZED THERMAL SHOCKS ; CRACK-TIP FIELDS ; FRACTURE ASSESSMENT ; HARDENING MATERIAL ; STRESS ; PARAMETERS ; INPLANE ; STEELS |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000430767100012 |
| 资助机构 | Swiss Federal Nuclear Safety Inspectorate (ENSI) (DIS-Vertrag)(H-100668) |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/77472]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Qian GA,Cao YP,Niffenegger M,et al. Comparison of constraint analyses with global and local approaches under uniaxial and biaxial loadings[J]. EUROPEAN JOURNAL OF MECHANICS A-SOLIDS,2018,69:135-146. |
| APA | 钱桂安,Cao YP,Niffenegger M,Chao YJ.,&Wu WW.(2018).Comparison of constraint analyses with global and local approaches under uniaxial and biaxial loadings.EUROPEAN JOURNAL OF MECHANICS A-SOLIDS,69,135-146. |
| MLA | 钱桂安,et al."Comparison of constraint analyses with global and local approaches under uniaxial and biaxial loadings".EUROPEAN JOURNAL OF MECHANICS A-SOLIDS 69(2018):135-146. |
入库方式： OAI收割
来源：力学研究所
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