Abstract

This presentation details the calibration of a numerical creep model for polypropylene, a material used by Robert Bosch in Wrocław for the production of brake fluid reservoirs. The creep model, implemented in Abaqus, was calibrated using the 3DEXPERIENCE Material Calibration platform. The calibration process involved fitting the parameters of a rheological model to experimental creep test data. The efficiency of different optimization algorithms, including the gradient-free Nelder-Mead and Hooke-Jeeves methods, was compared. The presentation includes a detailed comparison of the results obtained, analyzing the advantages and disadvantages of each algorithm in terms of accuracy, computation time, and convergence. Based on the real-world calibration, conclusions regarding the optimal algorithm selection for polypropylene creep modeling and guidelines for the effective use of the 3DEXPERIENCE Material Calibration platform in material engineering will be presented. The results are significant for precise modeling of brake fluid reservoir behavior under operational conditions.

Slide deck

Presenter Bio

Adam Kasprzak is a CAE Simulation Engineer specializing in static and dynamic simulations, material modeling, and automation projects. With over eight years of experience in the automotive industry, he has held specialist roles at Robert Bosch and ZF Wabco. His expertise includes developing and implementing new calculation methods, calibrating material models, and developing Python scripts for simulation software like Abaqus. His research on polymer failure parameters has been published (10.3390/polym16152128), and he has contributed to the field as a Material Expert (10.3144/expresspolymlett.2025.14). Currently pursuing a Doctor of Philosophy (Implementation Doctorate) at Wroclaw University of Science and Technology, his research focuses on Finite Element Methods and has been supported by a grant from the Polish Ministry of Science. He holds a Master of Science in Quality Management and a Bachelor of Engineering in Mechanics and Machine Design, both from Wroclaw University of Science and Technology. His academic achievements include winning the SIMP Diploma Thesis Competition and earning the title of Mechanical Designer.