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METHOD FOR ESTIMATING STRESS INTENSITY FACTORS AND METHOD FOR CALCULATING ASSOCIATED SERVICE LIFE
METHOD FOR ESTIMATING STRESS INTENSITY FACTORS AND METHOD FOR CALCULATING ASSOCIATED SERVICE LIFE
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机译:估计应力强度因子的方法和计算相关使用寿命的方法
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摘要
The invention relates to a method for estimating (100) stress intensity factors (FIC) in a numerically modelled part, in the context of a fatigue crack propagation model, comprising the following steps: —(E2): obtaining, from a numerical model of the part to be analysed (20), a plurality of values simulated at various points of the part to be analysed (20), —(E3): determining a converted value (ΔK) of the effective stress intensity amplitude corresponding to a straight front of a planar crack, as well as a converted length (a) of the crack corresponding to a planar crack with a straight front, said converted values being determined by equalisation of the energy dissipated in the three-dimensional crack of the numerical model and the energy dissipated in the crack of a standard model of a planar crack with a straight front, —(E4): interpolating converted values of effective stress intensity factor amplitude between two successive converted lengths (a), —(E5): storing the converted values of effective stress intensity factor amplitude interpolated in this way.
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