Is it possibile to measure the "back stress" via compressive loading-unloading-reloading (LUR) test? I found numerous publications where back stress is measured using tension LUR test.
The back stress is related to the movement of the yield surface. I'm not sure if the loading-unloading-reloading test is proper for determining this tensor. In the case of one-direction loading is hard to divide between isotropic and kinematic hardening effect.
Due to the effect of strain partitioning and back stress hardening, the HSM attains an even higher strain hardening rate than the homogeneous CGM, unlike the general tendency for grain refinement. It should be noted that the strain localized area in a heterogeneous structure generally plays an important role in back stress hardening, but can be a critical point of failure at the same time.
Steven Van Petegem I want to investigate the evolution of HDI stress in a severely plastically deformed heterogeneous aluminium alloy. Do You think that compression (LUR) test will also be appropriate ?
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