Yield stresses adiabatic heating

For k 1, isothermal conditions prevail, while /< -c 1 when the situation is adiabatic. The characteristic timescale to for the present study is defined as the time to attain the material toughness A[r for a given loading rate, i.e., to = Kf1/K. The characteristic length Lq is taken as the size of the plastic zone of a perfectly plastic material with yield stress s0 so that L0 = (fQ/so)2 [57]. For k 1, heat conduction needs to be accounted for and this condition results in the estimation of... 

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