Mode II delamination toughness of z-pinned laminates

Wenyi Yan; Hong Yuan Liu; Yiu Wing Mai

doi:10.1016/j.compscitech.2004.02.008

Mode II delamination toughness of z-pinned laminates

Wenyi Yan, Hong Yuan Liu, Yiu Wing Mai

Research output: Journal article publication › Journal article › Academic research › peer-review

120 Citations (Scopus)

Abstract

Mode II delamination toughness of z-pin reinforced composite laminates is investigated using finite element (FE) method. The z-pin pullout process is simulated by the deformation and breakage of non-linear springs. A critical shear stress criterion based on linear elastic fracture mechanics is used to simulate crack growth in an end-notched-flexure (ENF) beam made of z-pinned laminates. The mode II toughness is quantified by the potential energy release rate calculated using the contour integral method. This FE model is verified for an unpinned ENF composite beam. Numerical results obtained indicate that z-pins can significantly increase the mode II delamination toughness of composite laminate. The effects of design variables on the toughness enhancement of z-pinned laminates are also studied, which provides an important technological base and useful data to optimize and improve the z-pinning technique.

Original language	English
Pages (from-to)	1937-1945
Number of pages	9
Journal	Composites Science and Technology
Volume	64
Issue number	13-14
DOIs	https://doi.org/10.1016/j.compscitech.2004.02.008
Publication status	Published - Oct 2004
Externally published	Yes

Keywords

B. Fracture (delamination) toughness
C. Computational simulation
C. Delamination
C. Laminates
Z-pin reinforcement

ASJC Scopus subject areas

Ceramics and Composites
General Engineering

More information

10.1016/j.compscitech.2004.02.008

Cite this

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title = "Mode II delamination toughness of z-pinned laminates",

abstract = "Mode II delamination toughness of z-pin reinforced composite laminates is investigated using finite element (FE) method. The z-pin pullout process is simulated by the deformation and breakage of non-linear springs. A critical shear stress criterion based on linear elastic fracture mechanics is used to simulate crack growth in an end-notched-flexure (ENF) beam made of z-pinned laminates. The mode II toughness is quantified by the potential energy release rate calculated using the contour integral method. This FE model is verified for an unpinned ENF composite beam. Numerical results obtained indicate that z-pins can significantly increase the mode II delamination toughness of composite laminate. The effects of design variables on the toughness enhancement of z-pinned laminates are also studied, which provides an important technological base and useful data to optimize and improve the z-pinning technique.",

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AU - Yan, Wenyi

AU - Liu, Hong Yuan

AU - Mai, Yiu Wing

PY - 2004/10

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N2 - Mode II delamination toughness of z-pin reinforced composite laminates is investigated using finite element (FE) method. The z-pin pullout process is simulated by the deformation and breakage of non-linear springs. A critical shear stress criterion based on linear elastic fracture mechanics is used to simulate crack growth in an end-notched-flexure (ENF) beam made of z-pinned laminates. The mode II toughness is quantified by the potential energy release rate calculated using the contour integral method. This FE model is verified for an unpinned ENF composite beam. Numerical results obtained indicate that z-pins can significantly increase the mode II delamination toughness of composite laminate. The effects of design variables on the toughness enhancement of z-pinned laminates are also studied, which provides an important technological base and useful data to optimize and improve the z-pinning technique.

AB - Mode II delamination toughness of z-pin reinforced composite laminates is investigated using finite element (FE) method. The z-pin pullout process is simulated by the deformation and breakage of non-linear springs. A critical shear stress criterion based on linear elastic fracture mechanics is used to simulate crack growth in an end-notched-flexure (ENF) beam made of z-pinned laminates. The mode II toughness is quantified by the potential energy release rate calculated using the contour integral method. This FE model is verified for an unpinned ENF composite beam. Numerical results obtained indicate that z-pins can significantly increase the mode II delamination toughness of composite laminate. The effects of design variables on the toughness enhancement of z-pinned laminates are also studied, which provides an important technological base and useful data to optimize and improve the z-pinning technique.

KW - B. Fracture (delamination) toughness

KW - C. Computational simulation

KW - C. Delamination

KW - C. Laminates

KW - Z-pin reinforcement

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DO - 10.1016/j.compscitech.2004.02.008

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SN - 0266-3538

VL - 64

SP - 1937

EP - 1945

JO - Composites Science and Technology

JF - Composites Science and Technology

IS - 13-14

ER -

Mode II delamination toughness of z-pinned laminates

Abstract

Keywords

ASJC Scopus subject areas

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