Rate-Dependent Mode Ii Interlaminar Fracture Behavior of Carbon-Fiber/Epoxy Composite Laminates

Kusaka, Takayuki; Hojo, Masaki; Ochiai, Shojiro; Kurokawa, Tomoaki

doi:10.2472/jsms.48.6appendix_98

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…The analytical solution to predict the tensile strength of a UACS laminate agreed well with the experiment results [4]. The fracture toughness estimated from the measured tensile strength and a one-dimensional model coincided with the mode II interlaminar fracture toughness of CFRP laminates with the same resin system, which was measured via the interlaminar toughness tests [21][22][23]. Moreover, the hackle pattern, which is generated by interlaminar shearing, is clearly observed on the delaminated surfaces of the UACS laminates in supplementary experiments (Fig.…”

Section: Analytical Modelsupporting

confidence: 69%

Simple approach for modeling unidirectionally arrayed chopped strand laminates via the extended finite-element method

Yashiro

Okuda

Ogi

et al. 2019

Composite Structures

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Section: Analytical Modelsupporting

confidence: 69%

Simple approach for modeling unidirectionally arrayed chopped strand laminates via the extended finite-element method

Yashiro

Okuda

Ogi

et al. 2019

Composite Structures

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“…With fabrication route A, the crack was arrested at the first vascule followed by rapid unzipping of the remaining 20mm of the crack plane. The Mode II fracture toughness has also been reported to be rate dependent with reduced toughness recorded at high strain rates [29,30]. The crack plane immediately beyond a vascule is exposed to a rapid increase in displacement rate on crack propagation from the vascule, so uncontrolled rapid crack propagation could be expected.…”

Section: Mode II Crack-vascule Interactionsmentioning

confidence: 99%

Interactions between propagating cracks and bioinspired self-healing vascules embedded in glass fibre reinforced composites

Norris

Bond

Trask

2011

Composites Science and Technology

110

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International audienceThis study considers the embedment of a bioinspired vasculature within a composite structure that is capable of delivering functional agents from an external reservoir to regions of internal damage. Breach of the vascules, by propagating cracks, is a crucial pre-requisite for such a self-healing system to be activated. Two segregated vascule fabrication techniques are demonstrated, and their interactions with propagating Mode I and II cracks determined. The vascule fabrication route adopted played a significant role on the resulting laminate morphology which in-turn dictated the crack-vascule interactions. Embedment of the vascules did not lower the Mode I or II fracture toughness of the host laminate, with vascules orientated transverse to the crack propagation direction leading to significant increases in G and G through crack arrest. Large resin pockets were found to redirect the crack around the vascules under Mode II conditions, therefore, it is recommended to avoid this configuration for self-healing applications

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“…Unidirectional laminates also seem to provide conservative values over nonunidirectional or angle-ply composite laminates [5,16,17]. For higher rates, no significant changes are expected up to intermediate loading rates around one meter per second [19][20][21] and somewhat lower values than quasi-static mode II have been reported for mode II fracture toughness under impact speed loads (up to 20 m/s) [21]. So far, there is no indication that quasi-static mode I delamination tests performed on unidirectional CFRP will not provide a conservative value compared with other loading modes or composites with other fiber orientation [21].…”

Section: Mode I Versus Mode Ii Fatigue Delamination Growthmentioning

confidence: 99%

Fatigue Delamination Growth in CFRP Composites: From Pure Mode I and Mode II to Mixed Mode I/II

Stelzer

Pinter

2015

MSF

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For composite design, it is desirable to have data covering the failure envelope from Mode I to Mode II. The existing standard procedures for quasi-static testing (ISO 15024 for Mode I and ISO DIS 15114 for Mode II) have recently been shown to be adaptable for the respective fatigue tests under displacement control. The Calibrated End-Loaded Split (C-ELS) test set-up developed for Mode II further allows performing a Fixed-Ratio Mixed Mode I/II (FRMM) test by simply inverting the loading direction compared to mode II.

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Rate-Dependent Mode Ii Interlaminar Fracture Behavior of Carbon-Fiber/Epoxy Composite Laminates

Cited by 4 publications

References 14 publications

Simple approach for modeling unidirectionally arrayed chopped strand laminates via the extended finite-element method

Simple approach for modeling unidirectionally arrayed chopped strand laminates via the extended finite-element method

Interactions between propagating cracks and bioinspired self-healing vascules embedded in glass fibre reinforced composites

Fatigue Delamination Growth in CFRP Composites: From Pure Mode I and Mode II to Mixed Mode I/II

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