IRTG Modern Inverse Problems (MIP)

Modeling and Simulation of Solidification with Isogeometric Interface Tracking Methods

09. Oktober 2018 | von

Prof. Dr. Stefanie Egleti

The proposed project originates in the field of production engineering—or more specifically—primary manufacturing processes. The underlying principles of these processes is that material is brought into a liquid state in order to make it shapable. This shape is then sought to be maintained throughout a subsequent solidification process, which returns the material to a solid state and makes the product usable under standard environmental conditions. The state of the material—here liquid or solid—depends on process conditions, such as temperature, pressure, etc. The transition from a liquid to a solid phase—the solidification—is a spontaneous process initiated by heat extraction (cooling). The process is locally initiated by nucleation and proceeds by movement of phase boundaries. During solidification, shrinkage and warpage may occur, leading to negative effects on the final product’s quality. In order to gain a better understanding of these effects, this project focuses on modeling and simulation of the solidification process. It covers the following aims:

Aim 1: Derivation of a nucleation model as well as definition of a tracking method for the phase interface within an isogeometric context;

Aim 2: Evaluation of properties resulting from solidification—examples are shrinkage, warpage, residual stresses—that are relevant to engineering applications.

Within the project, semi-crystalline polymers in an injection molding process will serve as a working example.

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