Description
This presentation addresses a fundamental challenge in high-temperature manufacturing and structural integrity assessment: the gap between empirical model calibration and genuinely predictive life assessment of welded components operating under creep conditions. Using Type IV weld failure as a representative case, it argues that agreement with existing test data does not necessarily establish predictive credibility when models are extrapolated to long-term service conditions involving lower stresses, evolving microstructures and complex multiaxial stress states. A conceptual framework, termed predictive admissibility, is introduced to evaluate whether constitutive models possess the structural foundations required for credible extrapolation. The framework is organised through five auditing principles: deformation consistency, mechanism representation, regime integration, scale compatibility and traceability. The presentation further demonstrates the development of mechanism-resolved creep damage constitutive equations, including improved stress-range modelling and physically traceable cavitation evolution formulations, providing a disciplinary bridge from empirical inheritance toward scientifically defensible predictive confidence in weld-life assessment.| Period | 28 Aug 2026 |
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| Event title | 7th ABCP Annual Conference: Partnership, Confidence, and Prosperity |
| Event type | Conference |
| Conference number | 7 |
| Location | Cambridge, United KingdomShow on map |
| Degree of Recognition | International |