Plastic collapse of thin-walled frusta and egg-box material under shear and normal loading

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Abstract

The quasi-static plastic collapse of thin-walled frusta is determined for combined shear and out-of-plane compression. Experiments and finite element calculations are conducted on conical metallic frusta with semi-included cone angles of 30 degrees and 45 degrees to determine the shear collapse response. Additional finite element predictions are given for compressive loading, and for combined shear-compressive loading. The dependence of strength and energy absorption upon geometry is explored. The predicted response of an array of conical frusta is used to give the overall response of an egg-box material sandwiched between rigid face sheets. Scaling laws are determined for the stiffness and strength as a function of relative density of the egg-box material. (c) 2006 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)799-808
Number of pages9
JournalInternational Journal of Mechanical Sciences
Volume48
DOIs
Publication statusPublished - 2006

Keywords

  • plastic collapse
  • energy absorption
  • egg-box material
  • conical frusta
  • IMPACT ENERGY ABSORBERS
  • CYLINDRICAL-SHELLS
  • AXIAL-COMPRESSION
  • TUBES
  • ABSORPTION

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