Study on desigining the superior crushing response of lightweight egg-box panel

Abstract eng:
In this paper, study on designing the superior crushing response of lightweight egg-box panel is carried out which consisted of a conical frusta and the base, by a using finite element method. There exists three kinds of deformation stages, and the compressive load- displacement curve for each stages, can be evaluated from that for semisphere and conical frusta proposed by other researchers, where the strain-hardening effect can be relatively small. However, if the strain-hardening of material increases, the deformation behavior changes, and the conventional estimation technique cannot be used. In order to take the strain hardening effect into consideration, instead of using yield stress, one has to use an energy equivalent flow stress defined by the work-hardening exponent (n-value), and evaluate the compressive load. Further, a controlling technique for the ideal compressive load-displacement curve is proposed by introducing the basement and changing the length of the basement and the cone angle.

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