Delamination threshold load for dynamic impact on plates

Robin Olsson, Mauricio V Donadon, Brian G Falzon

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

A criterion is derived for delamination onset in transversely isotropic laminated plates under small mass, high velocity impact. The resulting delamination threshold load is about 21% higher than the corresponding quasi-static threshold load. A closed form approximation for the peak impact load is then used to predict the delamination threshold velocity. The theory is validated for a range of test cases by comparison with 3D finite element simulation using LS-DYNA and a newly developed interface element to model delamination onset and growth. The predicted delamination threshold loads and velocities are in very good agreement with the finite element simulations. Good agreement is also shown in a comparison with published experimental results. In contrast to quasi-static impacts, delamination growth occurs under a rapidly decreasing load. Inclusion of finite thickness effects and a proper description of the contact stiffness are found to be vital for accurate prediction of the delamination threshold velocity

Original languageEnglish
Pages (from-to)3124-3141
Number of pages18
JournalInternational Journal of Solids and Structures
Volume43
Issue number10
Early online date01 Jul 2005
DOIs
Publication statusPublished - May 2006

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

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