Development of a corrugated test specimen for composite materials energy absorption

One of the key factors preventing the widespread adoption of composites in primary crash structures is the absence of specialized test methods for the characterization of specific energy absorption (SEA). Aside from thin-walled tubular specimens, a limited number of attempts have been made at using a plate specimen, which is easier to manufacture but requires complex anti-buckling fixtures. A new method, featuring a corrugated plate, which can be easily manufactured and is self-stabilizing and hence does not require a dedicated test fixture, is suggested here. A systematic investigation is performed to validate the possibility of using such specimen to screen candidate material systems and laminate designs, with the specific goal of isolating the sensitivity of the method to intrinsic specimen parameters.