Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
770490 | Engineering Fracture Mechanics | 2012 | 16 Pages |
The effects of anisotropy during mixed mode fatigue crack growth were studied in single crystal 316L stainless steel. An anisotropic least-squares regression algorithm using displacements from digital image correlation was developed to find the effective stress intensity factors, KI and KII, and the T-stress. Crack tip plastic zones were determined using an anisotropic yield criterion. Strains in the plastic zone obtained from digital image correlation showed a dependence on the crystallography and load ratio. Crack tip slip irreversibility was measured and showed an increasing trend with increasing crack length; this information is critical for describing crack growth behavior.
► Mixed mode fatigue crack growth in single crystals was analyzed. ► An anisotropic algorithm to find effective stress intensity factors was written. ► The effects of anisotropy on plastic zone sizes and shapes were studied. ► Crack tip slip irreversibility was measured and increased with crack length.