The Strain Rate Effect

摘要

So while holding temperature constant, we have produced a change from ductile failure to brittle failure by simply changing the velocity of the impact event. If we inspected specimens from the two tests we would see that the ductile failure would produce only a small hole punched through the specimen. This piece of displaced material would still be attached to the specimen; stress whitening would be evident around the impact zone; and no cracks would be visible.