Modeling time-dependent anisotropy in MEX component-scale process simulation

In this paper, a numerical method is proposed to consider the transient anisotropic orientation state of a material extruded (MEX) part during a macroscale process simulation. To enhance computational efficiency, multiple filament strands are considered within single finite elements. The model is constructed around the utilization of 4th order orientation tensors, obtained by combining the information of the nozzle toolpath and the mesh elements in accordance with the process time. This provides a dynamic mapping of the anisotropic material orientation state within each element, in real-time to the process trajectory. Through the integration of timedependent orientation tensors, this research provides deeper insights into filaments alignment evolution during the MEX process. This advancement not only enhances predictive capabilities in process simulation but also streamlines computational demands.