| Autor: |
Suresh Kumar, R., Rao, BN, Velusamy, K., Sachin, B. M. |
| Zdroj: |
Transactions of Indian National Academy of Engineering; 20210101, Issue: Preprints p1-7, 7p |
| Abstrakt: |
Computational crack growth studies play a vital role in the safety demonstration of the power plant piping system. Recent advancements in this domain have led to the use of fracture mechanics-based numerical crack growth analysis. Traditionally, numerical fatigue crack growth (FCG) is simulated using material parameters generated from Compact Tension (CT) specimen tests. But, such an approach is inadequate to predict crack growth behaviour in large-sized pipe bends; the primary difficulty being its inability to address the residual compressive stress locked during the rolling process of pipe fabrication. The development of prototype-based material parameters for FCG simulation is a potential method to address the above issue. Though this approach is interesting, it is not easy to generalise it to all the geometries. Further, the fabrication assisted residual stress depends upon pipe dimensions also. Despite its shortcomings, it has been demonstrated that a numerical simulation with the material parameters derived from the prototype test captures the realistic FCG behaviour. |
| Databáze: |
Supplemental Index |
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