Theory and numerics of Additive Manufacturing Processes

Coupling of thermography and digital image correlation with applications in additive manufacturing

Lutz Müller-Lohse

Thermography yields two-dimensional information of the temperature distribution on a part, although parts might have curved surfaces. Using digital image correlation, three-dimensional surface coordinates are available. Thus, a coupling of both camera systems should lead to in-plane temperature gradient information. Apart from classical approaches using triangulations concepts, radial basis functions are applied to interpolated the point data of both systems. Using these concepts yield in-plane temperature and displacement as well as in-plane temperature gradient and strain distributions on curved surfaces. This is of particular interest in additively manufactured parts, which might have wavy and curved surfaces.