THE THERMOELASTIC MATERIAL MOMENTUM EQUATION

The equation of material momentum, or pseudomomentum, is obtained for thermoelastic materials. This is done in the classic theory, based on the heat conduction hypothesis, and also in the framework of a thermoe lasticity approach involving no dissipation of energy, as recently pro posed by Green and Naghdi. The results are applied to the thermoelasti c fracture problem. When the pseudomomentum equation is written in glo bal form, for a fractured body, it provides path-domain invariant expr essions for the thermoelastic energy-release rate.