|About this Abstract
||NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
||S-08: Incremental Forming
||Numerical Analysis of the Complex Loading Path during Tube Flow Forming Processes
||Marie-Anne Vidal, Pierre-Olivier Bouchard, François Frascati, Jean-Pierre Mallet, Katia Mocellin
|On-Site Speaker (Planned)
Thin-walled tubes can be produced using different forming processes. The pros of flow forming are the good mechanical properties resulting from strain hardening induced by the process. It allows lightened structures by using flow-formed tubes having the same mechanical characteristic as heavier tubes produced differently, and there is no material waste. The cons are a complex loading path during the process, involving simultaneously tension, compression and shear. The design of new industrial parts is yet only based on the empirical knowledge of the technician. Therefore, modeling the process is the key for defining optimal process conditions rapidly without additional development costs for a large range of materials. However, understanding the mechanics of tubes flow forming is essential for a correct modeling of the material behavior during the process.
This study focuses on the influence of both numerical and experimental parameters (such as time step, meshing settings, friction, and feed rate) on ductile fracture in numerical simulation of a three-roller tube flow forming operation. The validation of such simulations requires experimental data. Flow forming experiments with different process parameters are therefore performed on a laboratory tube flow forming device developed in CEMEF to compare the influence of those parameters on the flow formability of tubes. Results on an industrial flow forming machine and on the laboratory flow forming device will also be compared.