Adiabatic Shear Instability: Observations and Experimental Techniques

摘要: Although an extensive literature exists on experimental studies of adiabatic shear banding in metals1 and bands have been studied polymers at low rates deformation2 very little has published (ASBs) high deformation (see Adiabatic Shear Instability: Theory). Most polymer failure during impact largely concerned with fracture3, ballistic impact4, sensitisation energetic materials5. As ASBs are often precursors to fracture, it is not always clear from post-mortem examination a specimen whether shear-bands were present before fracture took place, particularly if the was partially or entirely mode III. The rubbing together free surfaces can destroy crucial evidence nucleation growth bands.