Tailoring Sandwich Face/Core Interfaces for Improved Damage Tolerance: Part I: Finite Element Analysis

Christian Lundsgaard-Larsen, Christian Berggreen, Leif A. Carlsson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Various modifications of the face/core interface in foam core sandwich specimens are examined in a series of two papers. This paper constitutes part I and describes the finite element analysis of a sandwich test specimen, i.e. a DCB specimen loaded by uneven bending moments (DCB-UBM). Using this test almost any mode-mixity between pure mode I and mode II can be obtained. A cohesive zone model of the mixed mode fracture process involving large-scale bridging is developed. Results from the analysis are used in Part II, which describes methods and results of a series of experiments.
Original languageEnglish
JournalApplied Composite Materials
Volume17
Issue number6
Pages (from-to)609-619
ISSN0929-189X
DOIs
Publication statusPublished - 2010

Keywords

  • Crack kinking
  • Cohesive zone modeling
  • Fracture resistance
  • Sandwich structures

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