Multi-Scale Approach of HCF Taking into Account Plasticity and Damage: Application to LPBF Materials

Laser additive manufacturing enables economical production of complex lightweight structures. To realize the potential benefits technology in industrial applications, fatigue performance parts additively manufactured materials must be modelized. The aim this paper is to present a new modeling approach combining plasticity and damage, appropriate for as-built Laser-Powder Bed Fusion (LPBF) model presented an extension Dang Van criterion, including defined as porosity case LPBF. Attention focused on integration damage criterion using concept elastic shakedown. Finally, 316L will illustrate results by tests with deterministic defects.