Abstract
In the presence of excessive plasticity, the fracture toughness depends on the size and geometry. For material under fully yielded conditions, the stresses near the crack tip are not unique, but depend on geometry. So Single-parameter; Japproach is limited to high-constraint crack geometry. J-Q theory has been proposed in order to decide crack geometry constraint. This approach assumes that the crack-tip fields have two degrees of freedom. In this paper, based on J-Q theory, crack-tip stress field of fully circumferential cracked pipe under combined load is investigated using FE analysis. Combined loads are tensile axial force and thermal gradient of radial direction. Q-stresses of a crack geometry and it's loading state are used to determine constraint effect, and give a characteristic order for crack-tip constraint.
| Original language | English |
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| Title of host publication | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
| Publisher | American Society of Mechanical Engineers (ASME) |
| Volume | 1 |
| ISBN (Print) | 9780791845981 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
| Event | ASME 2014 Pressure Vessels and Piping Conference, PVP 2014 - Anaheim, United States Duration: 2014 Jul 20 → 2014 Jul 24 |
Other
| Other | ASME 2014 Pressure Vessels and Piping Conference, PVP 2014 |
|---|---|
| Country/Territory | United States |
| City | Anaheim |
| Period | 14/7/20 → 14/7/24 |
ASJC Scopus subject areas
- Mechanical Engineering