Ultimate Failure of Debond Damaged Sandwich Panels Loaded with Lateral Pressure

An Experimental and Fracture Mechanics Study

Perttu Jolma, Sebastian Segercrantz, Christian Berggreen

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

In this study a tool for assessing residual strength of debond damaged laterally loaded sandwich panels is developed. The analysis tool consists of a parametric finite element model and a fracture mechanics calculation procedure to determine the residual strength. The parametric approach allows variation of all geometric and material entities. The fracture mechanics calculation uses crack flank displacements obtained from the finite element analysis solution and experimentally measured mixed-mode fracture toughness values to determine the ultimate failure load. The analysis tool is validated with a number of different ship type panels. Debond criticality is evaluated by using the developed tool and by comparing the test results from panel experiments. The comparison shows that the analysis tool predicts both failure load and failure mode well. The tool can be used to determine the residual strength of different damage cases and has a considerable potential for further development.
Original languageEnglish
Pages (from-to)167-196
JournalJournal of Sandwich Structures and Materials
Volume9
Issue number2
DOIs
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed

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Fracture mechanics
Failure modes
Fracture toughness
Ships
Cracks
Finite element method
Experiments

Keywords

  • debond
  • interface
  • foam core
  • damage tolerance
  • residual strength
  • sandwich panels
  • pressure loads
  • marine structures

Cite this

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title = "Ultimate Failure of Debond Damaged Sandwich Panels Loaded with Lateral Pressure: An Experimental and Fracture Mechanics Study",
abstract = "In this study a tool for assessing residual strength of debond damaged laterally loaded sandwich panels is developed. The analysis tool consists of a parametric finite element model and a fracture mechanics calculation procedure to determine the residual strength. The parametric approach allows variation of all geometric and material entities. The fracture mechanics calculation uses crack flank displacements obtained from the finite element analysis solution and experimentally measured mixed-mode fracture toughness values to determine the ultimate failure load. The analysis tool is validated with a number of different ship type panels. Debond criticality is evaluated by using the developed tool and by comparing the test results from panel experiments. The comparison shows that the analysis tool predicts both failure load and failure mode well. The tool can be used to determine the residual strength of different damage cases and has a considerable potential for further development.",
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Ultimate Failure of Debond Damaged Sandwich Panels Loaded with Lateral Pressure : An Experimental and Fracture Mechanics Study. / Jolma, Perttu; Segercrantz, Sebastian; Berggreen, Christian.

In: Journal of Sandwich Structures and Materials, Vol. 9, No. 2, 2007, p. 167-196.

Research output: Contribution to journalArticleScientificpeer-review

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AB - In this study a tool for assessing residual strength of debond damaged laterally loaded sandwich panels is developed. The analysis tool consists of a parametric finite element model and a fracture mechanics calculation procedure to determine the residual strength. The parametric approach allows variation of all geometric and material entities. The fracture mechanics calculation uses crack flank displacements obtained from the finite element analysis solution and experimentally measured mixed-mode fracture toughness values to determine the ultimate failure load. The analysis tool is validated with a number of different ship type panels. Debond criticality is evaluated by using the developed tool and by comparing the test results from panel experiments. The comparison shows that the analysis tool predicts both failure load and failure mode well. The tool can be used to determine the residual strength of different damage cases and has a considerable potential for further development.

KW - debond

KW - interface

KW - foam core

KW - damage tolerance

KW - residual strength

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KW - pressure loads

KW - marine structures

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