Inertial Impact Tests on Polymers for Inverse Parameter Identification
In aircraft and automotive components, polymeric materials such as PMMA are subjected to dynamic loading and deform at moderate (1–100 s−1) and high strain rates (>102 s−1). A methodology for calculating the strain-rate dependent parameters of PMMA at high strain rates will be presented. Images of each sample deforming were collected during an inertial impact test with an ultra-high speed camera, recording at 3 Mfps. The full field displacement, strain, and acceleration were input to the virtual fields method to perform an inverse identification of the material parameters.
KeywordsHigh-strain rate Ultra-high speed camera Virtual fields method (VFM) PMMA
Dr. Frances Davis and Prof. Fabrice Pierron acknowledge support from EPSRC through grant EP/L026910/1. Prof. Fabrice Pierron also expresses gratitude to the Wolfson Foundation for support through a Royal Society Wolfson Research Merit Award.
- 3.Devivier, C., Pierron, F.: Grid method GUI: a tool to process grid images. http://gridmethod.tk/GMGUI_r.php. Last accessed 4 Mar 2016