Abstract
The evaluation of combined primary and secondary stress effects on creep deformation and fracture is an important issue for structural integrity assessments. In this work the elastic-plastic creep behaviour of mechanically loaded cracked structures in the presence of residual stress has been studied. The transient crack tip parameter, C(t has been evaluated in single edge notch bend, SEN(B and tension, SEN(T specimens at different residual and mechanical stress levels, using the finite-element method. The effect of elastic-plastic material response on stress relaxation has been studied and results of the finite-element predictions are compared with an approximate analytical solution.
| Original language | English |
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| Publication status | Published - 2010 |
| Event | 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010 - Dresden, Germany Duration: 30 Aug 2010 → 3 Sep 2010 |
Conference
| Conference | 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale, ECF 2010 |
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| Country/Territory | Germany |
| City | Dresden |
| Period | 30/08/10 → 3/09/10 |
Keywords
- Creep
- Finite element
- Primary and secondary load
- Redistribution time
- Residual stress
- Stress relaxation