Abstract
The effect of the T-stress and plastic mismatch on interfacial crack-tip stress under small scale yielding condition is investigated in this paper via detailed finite element analyses. The mismatch in plastic strength/hardening is focused, and plane strain elastic-plastic crack-tip fields have been modeled with modified boundary layer formulation. Plastic mismatches as well as compressive T-stresses in bi-material are shown to affect the interfacial crack-tip constraint substantially. Simple patching of slip-line fields is presented to characterize the interfacial crack-tip stress fields. Effects of T-stress and plastic hardening mismatch on asymmetry of the J-integral for bi-materials, and its implication on interfacial toughness are also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1013-1031 |
| Number of pages | 19 |
| Journal | Engineering Fracture Mechanics |
| Volume | 68 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2001 May 25 |
| Externally published | Yes |
Bibliographical note
Funding Information:H. Lee is grateful for the support provided by a grant from the Korea Science and Engineering Foundation, and Safety and Structural Integrity Research Center.
Keywords
- Bi-material
- Finite element analysis
- Plastic mismatch
- Strees triaxiality
- T-stress
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering