Fracture mechanics model for predicting fracture strength of metallic alloys containing large second phase particles

摘要: An analytical fracture mechanics model for predicting the finite life fatigue strength of components is presented which combines a number well established and newly developed approaches such as Murakami’s McEvily’s approach describing transient behaviour crack closure short cracks, (long) function Newman, R6 procedure modified by method improving ligament yielding correction proposed authors other elements. Basic assumption preexistence initial flaws that initiation or nucleation stage small can be neglected. The application demonstrated tension plates aluminium Al 5380 H321 with artificial defects generated FIB technology, size was fixed on basis fractographic investigations broken, smooth specimens.