I'm dealing with friction stir spot welding of thermoplastic polymers such as PC: I've measured the plunging force and torque other than the temperature of the tool and that of the material at a reference point. I would like to develop a FE simulation of the process to better understand the material flow. Could a simply temperature dependent elast-plastic model be suitable for the purpose?
Elastic-plastic is not well suitable for this simulation, viscoplastic model could manage variations in viscosity and plasticity in polymer. Polymer doesn't melt at a specific temperature, some molecules melts first so you have a range of melting. In Polymer you can melt partially the polymer with FSW,
this is what I observed during the process. so for characterization of the material properties under different temperatures and strain rates could I perform compression tests (rather than tensile ones)?
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