Dynamic Evolution of Acrylonitrile Butadiene Styrene (ABS) Subjected to High Strain Rate Compressive Loads.

摘要

The goal of the present investigation is to better understand the potential energy absorption benefits of components fabricated using fused deposition modeling additive manufacturing. Tensile test specimens were fabricated, according to the ASTM D638 standard, to characterize the general mechanical behavior of the of 3D-printed Acrylonitrile Butadiene Styrene material to assess potential strain rate dependency. The mechanical evaluation was also necessary to determine properties necessary to characterize the dynamic evolution of ABS in compression at various strain rates. The ABS specimens were subjected to high strain rate deformation through the use of the split-Hopkinson Pressure Bar. During compression a new phenomenon described as a multistage collapse in which the sample undergoes multiple stages of compression and expansion was observed. As the velocity increases the capability for energy absorption decreases to where there is only one stage of compression equivalent to the initial stage.