Analysis of cracked lap shear testing of tungsten-CFRP hybrid laminates

J. Jokinen, M. Kanerva*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

In this work, we studied the effects of residual stresses on the testing of a cracked lap shear specimen (CLS). The analysis focused on tungsten-CFRP laminates for radiation protection applications. A 3-D finite element model was generated and the virtual crack closure technique (VCCT) was applied to determine fracture toughness. Crack propagation was analyzed using cohesive zone modelling (CZM) to combine multiple strain gauge data from experiments and the information from the VCCT. Our analysis indicated that residual stresses cannot be ignored in a valid analysis of tungsten-CFRP hybrid laminates—the experimentation with hybrid CLS specimens requires numerical crack simulation.

Original languageEnglish
Pages (from-to)184-200
Number of pages17
JournalEngineering Fracture Mechanics
Volume175
DOIs
Publication statusPublished - 15 Apr 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Cohesive zone modelling
  • Interface fracture
  • Residual stresses
  • Thin films
  • Toughness testing

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