| Autor: |
D. W. Beardsmore, Andrew H. Sherry, D.P.G. Lidbury, D. G. Hooton |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
Engineering Fracture Mechanics. 72:2396-2415 |
| ISSN: |
0013-7944 |
| DOI: |
10.1016/j.engfracmech.2004.12.010 |
| Popis: |
This Part II paper describes a series of constraint-based R6 assessments of shallow-cracked specimens under equibiaxial loading using material constraint parameters obtained from lookup tables presented in the companion Part I paper. Parameters are derived for an A533B-1 steel forging from a knowledge of the yield and flow behaviour of the material and a calibration of the Beremin model parameter m . Resulting assessments, which use both T - and Q -stress to quantify constraint, are found to be conservative with respect to the available experimental data. The results are also used to predict the influence of T -stress on the Master Curve reference temperature. Available data are broadly in agreement with the predicted trend curve. Finally, the results demonstrate that out-of-plane biaxial loading increases constraint to the extent that the inherent conservatism of the elastic T -stress at high L r is eroded. Out-of-plane constraint effects are only properly accounted for by the hydrostatic Q -stress and for this reason, the use of T to assess biaxial loading situations should be undertaken with a degree of caution. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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