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RISA Fully Implicit, Lower Bound, Multi Axial Solution Strategy for Direct Ratchet Boundary Evaluation: Implementation and Comparison
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ensuring sufficient safety against ratcheting is a fundamental requirement in pressure vessel design. However, determining the ratchet boundary using a full elasticplastic finite element analysis can be problematic and a ...
A Fully Implicit, Lower Bound, Multi Axial Solution Strategy for Direct Ratchet Boundary Evaluation: Theoretical Development
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ensuring sufficient safety against ratchet is a fundamental requirement in pressure vessel design. Determining the ratchet boundary can prove difficult and computationally expensive when using a full elastic–plastic ...
The Influence of Multiaxial Stress Relaxation on Component Creep Damage Accumulation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Unless inelastic analysis is used, high temperature codes base creep relaxation on the start-of-dwell equivalent stress, which relaxes according to a uniaxial creep law. Elastic follow-up is also included. This approach ...