Interface fracture assessment on honeycomb sandwich composite DCB specimens

Pradeep, K.R.; Rao, B. Nageswara; Srinivasan, Sivakumar M.; Balasubramaniam, Krishnan

doi:10.1016/j.engfracmech.2012.06.011

Cited by 22 publications

(10 citation statements)

References 14 publications

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“…A number of test methods have been proposed by many researchers to determine fracture toughness for three modes of loading (I, II, and III) and also under mixed‐mode conditions. The double cantilever beam (DCB) and the end notched flexure (ENF) specimens have been used for mode‐I and mode II tests, respectively . A crack rail shear (CRS) specimen has been proposed to determine the mode‐III (tearing) critical strain energy release rate .…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of fracture of ABS polymeric material for different sample's thickness using a new loading device

Oskui

Choupani

Haddadi

2013

Polymer Engineering & Sci

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The fracture behavior of ABS (acrylonitrile butadiene styrene) polymeric material has been investigated under the full range of in‐plane loading conditions using a new loading device to obtain more reliable results. Loading conditions from pure mode‐I through various mixed‐mode I/II ratios up to pure mode‐II have been generated using the proposed new loading device for the same specimen geometry. From the experimentally measured critical loads, the mode‐I, mode‐II, and the various mixed‐mode I/II critical energy release rates have been determined at different loading angles from 0° to 90°. Using the FE results, nondimensional stress intensity factors were applied to the specimen. The primary objectives of this study were to develop a new loading device to determine the mixed‐mode fracture toughness KIC and KIIC of ABS polymeric material. Another goal was to obtain stress intensity and strain energy release rates solutions associated with the crack, and to examine effects of thickness and geometric variables, particularly under mixed‐mode loading conditions. It was found that the thickness of the 10 mm specimen satisfied the plane strain condition with average fracture toughness ≈4.32 MPa·m1/2 under pure mode‐I loading and ≈1.42 MPa·m1/2 for pure mode‐II loading. POLYM. ENG. SCI., 54:2086–2096, 2014. © 2013 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of fracture of ABS polymeric material for different sample's thickness using a new loading device

Oskui

Choupani

Haddadi

2013

Polymer Engineering & Sci

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“…The fatigue experiments made with a tensile tester were carried out [5][6][7][8][9][10]. The result of fatigue experiment in this study can be applied in reality in order to evaluate the fracture property of TDCB-form joint structures made by porous material aluminum foam and study the mechanical properties systematically [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A Fatigue Fracture Study on TDCB Aluminum Foam Specimen of Type Mode III Bonded with Adhesive

Lee

Cho

2017

Archives of Metallurgy and Materials

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This paper studies the characteristics of junction structure of closed-cell type aluminum foam, which is generally used as a shock absorber. TDCB specimens were designed for mode III type with thickness as a variable and performed a fatigue experiment on them by thickness. As the result, the load value of all specimens peaks under 0 to 25 cycles and decreases as the cycles increase. As the specimen thickens by 10 mm, the maximum load value is 1.2 times. When the thickness increases by 20 mm, the maximum value increases by 1.5 times. This study result can be utilized by investigating the mechanical characteristics of TDCB specimens for mode III type under fatigue loading conditions systematically and efficiently.

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“…Subsequently, tensile forces are reduced with an increase in displacement, and the adhesive interface is completely separated when the crack is completely propagated as the stress has become completely zero. 15,16 Consequently, the governing equation for tensile force-displacement relationship of the bilinear cohesive zone model becomes:…”

Section: Laws Of Tensile Force-displacement Relationship and Analysismentioning

confidence: 99%

Investigation and verification of fatigue characteristic on the adhesive slanted interface of specimen with foaming aluminum for sliding mode

Sun

Cho

2015

Int. J. Precis. Eng. Manuf.

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Foaming aluminum is a super light weight manufactured by adding thickener and foaming agent after dissolving aluminum ingot to be foamed in a sponge configuration. Studying on fatigue of adhesive structures configured with aluminum foam and fracture toughness for adhesive interfaces may be considered very important. In this study, DCB specimens of aluminum foam composite material were designed based on British industrial standard (BS 7991) and ISO international specification (ISO 11343), and Mode II tests were performed. Examination of graphs of loads and displacements according to fatigue cycles for the four types of specimens shows that time capable of withstanding fatigue loads is the longer, the larger the slanted angle of the tapered double cantilever beam model under the same fatigue load conditions. Since similar results to those from actual experiments were observed based on comparisons of actual experimental data with analysis data, the analysis results according to a finite element method employed in this study could be relied upon, and it is considered that structural safety could be found by imulations alone in lieu of experiments requiring much cost and time when such method as this is applied.

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Interface fracture assessment on honeycomb sandwich composite DCB specimens

Cited by 22 publications

References 14 publications

Experimental and numerical investigation of fracture of ABS polymeric material for different sample's thickness using a new loading device

Experimental and numerical investigation of fracture of ABS polymeric material for different sample's thickness using a new loading device

A Fatigue Fracture Study on TDCB Aluminum Foam Specimen of Type Mode III Bonded with Adhesive

Investigation and verification of fatigue characteristic on the adhesive slanted interface of specimen with foaming aluminum for sliding mode

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