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Information × Registration Number 0205U006785, 0104U010601 , R & D reports Title Estimation of service life of cracked structural elements made with aluminium alloys at variable amplitude loading. popup.stage_title Head Pyndus Yuriy Ivanovych., Registration Date 20-12-2005 Organization Ternopil Ivan Pul'uj State Technical University popup.description2 The research work deals to development of analytical-experimental techniques of stress-strain state estimation ahead of fatigue crack and methods of fatigue crack growth prediction under variable amplitude loading (random operating loading). In particular, the optical coordinate grid method for strain and stress estimation on a spacimen surface in crack tip after overloading was developed. Using the methods of coordinate grid and finite element method the analysis of stress-strain state conditions ahead of crack tip in elasto-plastic statement were made. The accuracy of optical coordinate grid method for stress-strain state estimation ahead of fatigue crack is demonstrated. Using the developed fatigue crack growth model after single overloading, which is based on the idea of residual compression stresses definition in crack tip, the technique and software for prediction of fatigue crack growth under variable amplitude (operating) loading in aluminum alloy D16chT (2024T3) was developed. The fine compiliance of calculated and experimental data of fatigue life under variable amplitude loading (airplane wing spectra) was obtained. Product Description popup.authors popup.nrat_date 2020-04-02 Close