Micro-void evolution in the adiabatic shear bands

In order to understand the law of evolution of micro-voids in the adiabatic shear band, and open out the special failure rule when materials under high strain rate are loading, restricted detonation experiment was adopted to study steel D35. Tubes loaded by high explosive were observed by scanning electron microscope (SEM). Micro-voids nucleation, growth, and coalescence to damage in adiabatic shear bands (ASB) were observed by SEM. Based on the experimental results from Guduru's tests to ASB temperature field and Li Shaofan's simulation, the predigestion were applied to modify Timothy and Nutch-ings' model, viz. that (l)the temperature in ASB center is the highest, and fall linearly to be the same as the other places, (2)micro-voids' nucleation and growth in the ASB are controlled by temperature, and the growth velocity is exponential. The modified model can interpret the micro-void's nucleation, growth, and coalescence quantitatively.