Abstract：In the accident of vehicle pileup, the body structure is easy to be impacted many times, which has a great impact on the safety of automobile. Taking the aluminum alloy circular tube as the research object, through the combination of experiment and simulation, the dynamic response of aluminum alloy circular tube under repeated impacts and the influence rule of characteristic parameters on the transformation of failure mode were studied. The research results show that the energy absorption characteristics of aluminum alloy circular tube under repeated impacts such as load displacement curve, specific energy absorption and average load are closely related to the wrinkle formation process of the circular tube. In addition, ABAQUS software was used to simulate the failure process of aluminum alloy circular tube, and the influence rule of diameter thickness ratio and height diameter ratio of aluminum alloy circular tube on the transformation of failure modes under repeated impacts was studied and summarized.
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2020, Vol. 39 
