Abstract:

Based on the principles of engineering bionics and impact dynamics, 3 bionic design methods, which included 6 kinds of bumper beam, were introduced for enhancing the bumper’s crashworthiness to improve the crashworthiness and lightweight of bumpers. 5 mm / min compression test was carried out under
quasi-static condition. The test and simulation load curve were basically consistent, and the peak force error was only 3.9%, which verified the effectiveness of simulation analysis; the 100% overlap front impact was simulated by the software of Hypermesh and LS-DYNA. The results show that the bionic bumper beam 1, which includes bionic ribs, has the higher specific energy absorption (SEA) than original bumper beam by 13.85%. And here is a mass reduction for bionic bumper beam by 23.82%. The better bionic design methods are bionic rib and bionic variable spacing among those bionic methods. The corresponding bumper beam has lower peak load, higher energy absorption and lower mass than normal bumper beam, which also has better deformation mode.

Key words: automotive safety, passive safety, bumper, bionic design, bamboo, energy absorption