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مکانیک::
آسیب خستگی
Experimental evidence indicates that fatigue damage accumulates nonlinearly, depending on the alternating stress level.
Experimental evidence indicates that the nonlinear accumulation of the fatigue damage depends on the alternating stress level.
FIGURE 8.6 Fatigue damage for two cases (Rao, Pathak, and Chawla, 1999).
Damage per nucleus is given by D mrNa where m is the total number of fatigue damage nucleii, r is the coef- ficient of damage propagation rate and a function of stress level, and a is the damage prop- agation exponent, also a function of stress level.
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