VEHICLE ENERGY ABSORBING DEVICE

A vehicle door interior trim assembly includes a trim panel and an armrest supported by the trim panel. The armrest includes an energy absorbing device. The energy absorbing device includes an inboard panel and an outboard panel. The outboard panel is between the inboard panel and the trim panel. The energy absorbing device has a variable crush resistance based on a temperature of the energy absorbing device. A heater is operatively coupled to the energy absorbing device.