Abstract: The invention relates to an assembly (10) for absorbing impact energy, comprising a bumper beam and at least one energy absorbing device (1), interposed between this bumper beam (2) and a side member (3) of a motor vehicle, this energy absorbing device, also referred to as a crashbox, comprising a body comprising a plastic material and at least one insert (12) made from composite material comprising a plastic material and a reinforcing filler embedded in this plastic material of the insert, the plastic body and the composite insert being connected in particular by welding, bonding, thermoforming, the insert comprising a region of mechanical weakness (15) arranged to help initiate the breaking of the absorbing device.

Abstract: The invention relates to an energy-absorbing device configured to be mounted between a bumper and a longitudinal member of a motor vehicle, the energy-absorbing device comprising at least a first part, composed of a first reinforced material and forming a reinforcement of the energy-absorbing device, and a second part, composed of a second non-reinforced material and arranged around the reinforcement, the energy-absorbing device extending in a longitudinal main direction between the bumper and the longitudinal member and comprising at least one plate which is made of a material having a hardness greater than the hardness of the second non-reinforced material and which extends across the longitudinal direction of the energy-absorbing device.