Abstract
Some comments on the formulation/analyses of irreversible mechanical phenomena of solids are given for the sound development of the irreversible mechanics. First, the present state on the utilization of the subloading surface model is described and further utilization is recommended for the further development of the mechanical designs in engineering practice. Further, the disuse of the rate-independent elastoplastic constitutive model and instead the utilization of the subloading-overstress model are recommended, because the former is involved in the latter. Finally, it is described that the formulations of plastic flow rules based on the second law of thermodynamics is physically meaningless and thus it should be stopped in order to avoid the disturbance of the irreversible mechanics.
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