Author(s)

H.D. Espinosa

Abstract

In an attempt to elucidate the failure mechanism responsible for the so- called failure waves in glass, numerical simulations of plate impact exper- iments, with a microcracking multiple-plane model, have been performed. These simulations show that the failure wave phenomenon can be mod- eled by propagating surfaces of discontinuity from the specimen surface to its interior. Lateral stress increase, reduction of spall strength, and progressive attenuation of axial stress behind the failure front are prop- erly predicted by the multiple-plane model. Numerical simulations of high strain rate pressure shear experiments indicate the model predicts reason- ably well the shear resistance of the material at strain rates as high as 1x10^ /sec. The agreement is believed to be the result of the model capa- bility in s

Keywords