MODELLING AND SIMULATION MICROMACHINING OF THE ADDITIVELY MANUFACTURED METAL PARTS

This thesis aims to identify the dynamic material and damage model constants for additively manufactured stainless steel 316L and develop models and simulations to study and predict the micro machining process of selective laser melted (SLMed) stainless steel 316L. The influence of heat treatment conditions, scanning strategies, and machining process parameters on the machinability and surface roughness of additively manufactured metal is analyzed through modelling, simulation, and experiments. Frameworks of this thesis include four core parts: quasi-static compressive mechanical response and split-Hopkinson pressure bar tests of SLMed 316L to identify Johnson-Cook constitutive model constants; quasi-static tensile mechanical response and split-Hopkinson tensile bar tests to identify dynamic damage model constants for SLMed 316L stainless steel; experiments of the micro machining process to study machinability of SLMed 316L stainless steel; modelling and simulation with Johnson-Cook material model and Johnson-Cook damage model.

Author dc:creator

• YANG YUN

• additive manufacturing; modelling and simulation;