A systematical weight function modified critical distance method to estimate the creep-fatigue life of geometrically different structures
Source abstract
Abstract
Abstract This paper develops a novel weight function modified critical distance method to estimate the creep-fatigue lives of geometrically complex structures. A geometrical feature factor was defined to account for the geometry-induced stress gradient, namely the average normalized stress gradient. The conventional weight function was modified using this concept to assess the weight effect of stress distribution on the low-cycle fatigue (LCF) and creep lives, respectively. The weight function modified critical distance methods were verified by the LCF and the creep test data of the specimens with significantly different geometries. Furthermore, creep-fatigue experiments on the full-scale hollow and solid turbine blades were conducted. The creep-fatigue lives of turbine blades were predicted using the systematical weight function modified methodology. The predicted results showed a good agreement with the experimental lives. Compared with other models, this novel method achieves a significantly better accuracy in the case of LCF, creep and creep-fatigue life predictions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · High Temperature Alloys and Creep · Probabilistic and Robust Engineering Design
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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