Delamination fracture analysis in the GII-GIII plane using prestressed transparent composite beams

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58 Citations (Scopus)

Abstract

In this paper, the mixed-mode II/III version of the prestressed end-notched flexure fracture specimen is developed, which combines the well-known end-notched flexure and the modified split-cantilever beam specimens using a special rig. The new beam-like specimen is able to provide any combination of the mode-II and mode-III strain energy release rates. The mode-III part of the strain energy release rate is fixed by using the special rig, which loads the specimen in the plane of the delamination. The mode-II part of the strain energy release rate is provided by the external load using a three-point bending fixture. A simple closed-form solution using beam theory is developed for the strain energy release rates of the new configuration. The applicability and the limitations of the novel fracture mechanical test are demonstrated using unidirectional E-glass/polyester composite specimens. If only crack propagation onset is involved then the mixed-mode II/III prestressed end-notched flexure specimen can be used to obtain the fracture criterion of transparent composite materials in a relatively simple way.

Original languageEnglish
Pages (from-to)3359-3378
Number of pages20
JournalInternational Journal of Solids and Structures
Volume44
Issue number10
DOIs
Publication statusPublished - May 15 2007

Fingerprint

Composite Beams
Energy Release Rate
Delamination
Energy release rate
Strain Energy
Strain energy
strain energy release rate
Flexure
composite materials
Mixed Mode
flexing
Composite materials
Polyesters
Cantilever Beam
Cantilever beams
Crack Propagation
Composite Materials
Closed-form Solution
E glass
Crack propagation

Keywords

  • Beam theory
  • End-notched flexure
  • Interlaminar fracture
  • Modified split-cantilever beam
  • Three-point bending
  • Variable mode-mixity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

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title = "Delamination fracture analysis in the GII-GIII plane using prestressed transparent composite beams",
abstract = "In this paper, the mixed-mode II/III version of the prestressed end-notched flexure fracture specimen is developed, which combines the well-known end-notched flexure and the modified split-cantilever beam specimens using a special rig. The new beam-like specimen is able to provide any combination of the mode-II and mode-III strain energy release rates. The mode-III part of the strain energy release rate is fixed by using the special rig, which loads the specimen in the plane of the delamination. The mode-II part of the strain energy release rate is provided by the external load using a three-point bending fixture. A simple closed-form solution using beam theory is developed for the strain energy release rates of the new configuration. The applicability and the limitations of the novel fracture mechanical test are demonstrated using unidirectional E-glass/polyester composite specimens. If only crack propagation onset is involved then the mixed-mode II/III prestressed end-notched flexure specimen can be used to obtain the fracture criterion of transparent composite materials in a relatively simple way.",
keywords = "Beam theory, End-notched flexure, Interlaminar fracture, Modified split-cantilever beam, Three-point bending, Variable mode-mixity",
author = "A. Szekr{\'e}nyes",
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AB - In this paper, the mixed-mode II/III version of the prestressed end-notched flexure fracture specimen is developed, which combines the well-known end-notched flexure and the modified split-cantilever beam specimens using a special rig. The new beam-like specimen is able to provide any combination of the mode-II and mode-III strain energy release rates. The mode-III part of the strain energy release rate is fixed by using the special rig, which loads the specimen in the plane of the delamination. The mode-II part of the strain energy release rate is provided by the external load using a three-point bending fixture. A simple closed-form solution using beam theory is developed for the strain energy release rates of the new configuration. The applicability and the limitations of the novel fracture mechanical test are demonstrated using unidirectional E-glass/polyester composite specimens. If only crack propagation onset is involved then the mixed-mode II/III prestressed end-notched flexure specimen can be used to obtain the fracture criterion of transparent composite materials in a relatively simple way.

KW - Beam theory

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KW - Three-point bending

KW - Variable mode-mixity

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