Sub-Impact Phenomenon of Elasto-Plastic Free-Free Beam during a Strike

Based on Rayleigh beam theory, the sub-impacts of a free-free beam struck horizontally by a round-nosed rigid mass is simulated by the finite difference method and the impact-separation conditions. In order to obtain the sub-impact force, a uniaxial compression elastic-plastic contact model is employed to analyze the local deformation field on contact zone. It is found that the horizontal impact is a complicated process including the elastic plastic sub-impacts in sequence. There are two sub-zones of sub-impact. In addition, it found that the elastic energy of the free-free beam is more suitable for the Poisson collision hypothesis to explain compression and recovery processes.

Authors:

• H. Rong
• X. C. Yin
• J. Yang
• Y. N. Shen

Keywords:

• beam
• sub-impact
• elastic-plastic deformation
• finite difference method.

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