Integration of Damage Differentials (IDD): General presentation and verification results
Source abstract
Abstract
Abstract Integration of Damage Differentials (IDD) is proposed for fatigue life assessment, and such a method is completely different from any other life prediction approach. IDD can be applied under arbitrary loading including the general case of plane stress condition, that is, the stress–time functions σ x ( t ), σ y ( t ) and τ xy ( t ) can be deterministic or random and are not restricted to be cyclic, neither with specified variations, nor the three of them proportional. Then, no reversals and cycles could be distinguished along the loading path in the σ x − σ y − τ xy coordinate space. Hence, any trial to apply again the well-known notions of loading cycles (amplitudes) and damage per cycle would conceptually fail. That is why damage differentials d D are introduced in order to be summed (integrated), where еach damage differential d D is per loading (stressing) differential d s . Two empirical factors of (material’s sensitivity to) multiaxial loading non-proportionality, f c and f τ , are involved in the definition of d D . The IDD method has been implemented in software. Results of IDD verifications under multiaxial non-proportional loadings are shown. Based on them, an empirical data bank developed so far is given for IDD parameters.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Probabilistic and Robust Engineering Design · Structural Health Monitoring Techniques
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References (21)
Show source-provided references
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