Abstract
The physical interpretation of the J integral (i.e., J1 integral) is clear. J1 integral is the energy release rate associated with crack extension (i.e., translation of the crack in the x1 direction). However, the physical interpretation of the J2 integral remains unclear. In this study, different crack translations in the x2 direction were selected and tested by calculating the energy release rates associated with the crack translations and comparing them with the theoretical value of the J2 integral.
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