Abstract
Constraint effect plays an important role in assessing the stress field and the growth rate of creep crack in components under high temperature. The mismatched modified boundary layer (MMBL) model is extended to creep crack in this paper. For the MMBL model, the Q-parameters for different mismatch factors are studied under different T-stresses. The variation of the dimensionless T-stress in creep zone is given. The variations of open stresses with creep time for different mismatch factors are presented under different T-stresses. The comparisons of Q-parameter between homogeneous material and mismatched materials are made. The influences of mismatch factor on the constraint parameter are discussed. The influence of creep exponent on the open stress is also discussed.
| Original language | English |
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| Title of host publication | ASME 2016 Pressure Vessels and Piping Conference |
| Place of Publication | New York |
| Number of pages | 9 |
| Volume | 3 |
| DOIs | |
| Publication status | Published - 17 Jul 2016 |
| Event | ASME Pressure Vessels & Piping Conference 2016 - Hyatt Regency Vancouver, Vancouver, Canada Duration: 17 Jul 2016 → 21 Jul 2016 Conference number: 2016 https://www.asme.org/events/pvp |
Conference
| Conference | ASME Pressure Vessels & Piping Conference 2016 |
|---|---|
| Abbreviated title | ASME PVP |
| Country/Territory | Canada |
| City | Vancouver |
| Period | 17/07/16 → 21/07/16 |
| Internet address |
Keywords
- creep
- stress
- fracture
- boundary layers
- mismatched modified boundary layer
- mismatch factors
- Q-parameter
- open stress