Dynamic stress-strain compressive behaviour of FDM made ABS and PC parts under high strain rates

This paper presents an investigation on dynamic compressive behavior of ABS and Polycarbonate (PC) parts fabricated by Fused Deposition Modelling (FDM) additive manufacturing process when such parts are subjected to high strain rate loading conditions in engineering applications. Split Hopkinson Pressure Bar was used to carry out high strain rate compression tests on cylindrical test specimens fabricated by the FDM process using different FDM process parameters. The dynamic true stress strain curves at high strain rates were compared with quasi-static curves obtained from static compression tests at low strain rates. Results of dynamic compression tests show that FDM process parameter of build style has significant influence on the dynamic response of FDM made ABS and PC parts under high strain rate loading. FDM made PC materials exhibit higher compressive stress than ABS material under static and dynamic conditions. FDM parameters also affect the static compressive strength for both materials. (paper)