Eigenstrain reconstruction of residual strains in an additively manufactured and shot peened nickel superalloy compressor blade

摘要: Abstract Numerical modelling of the residual stresses and strains within mechanical components is great importance for improving quality reliability design structural integrity. A particularly versatile powerful approach offered by direct inverse eigenstrain modelling. The nature that it not only generates an efficient parametric representation stress field, but also ensures consistency enforcing equilibrium strain compatibility. In present study we propose a particular way prescribing field due to surface treatment such as shot peening. Eigenstrain variation described continuous function distance from boundary object in two-dimensional model its cross-section. procedure compatible with use commercial numerical simulation software, allows correct assignment all components. We apply technique evaluation additively manufactured nickel superalloy compressor blade was subsequently subjected peening treatment. Two experimental techniques are used validate model, namely, Focused Ion Beam ring core milling (FIB-DIC) synchrotron X-ray Powder Diffraction (SXRPD). Consistency between prediction measurements provides verification suitability consistent basis incorporation effects on deformation behaviour