Interfacial bond conditions and stress distribution in a two-dimensionally reinforced brittle-matrix composite

Steen, Marc; Vallés, J. L.

doi:10.1016/s0266-3538(97)00069-9

Cited by 11 publications

(4 citation statements)

References 44 publications

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“…Another possible reason for the different fracture surface morphologies relates to the different interfacial strength of tubes and matrix. For fibre-reinforced composites, it is known that the ease of pulling out of fibres from the matrix or their breakage during fracture strongly depends on the interfacial strength of fibres and matrix [31]. Hence, crack deflection along the nanotubes and their subsequent pull-out will be more difficult, with the consequence that the tubes rather break.…”

Section: (Figure 5)mentioning

confidence: 99%

Mechanical and electrical properties of polymer-derived Si–C–N ceramics reinforced by octadecylamine – Modified single-wall carbon nanotubes

Shopova-Gospodinova

Burghard

Dufaux

et al. 2011

Composites Science and Technology

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Please cite this article as: Shopova-Gospodinova, D., Burghard, Z., Dufaux, T., Burghard, M., Bill, J., Mechanical and electrical properties of polymer-derived Si-C-N ceramics reinforced by octadecylamine -modified single-wall carbon nanotubes, Composites Science and Technology (2011), doi: 10.1016/j.compscitech.2011 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.-1 - Polymer-derived Si-C-N ceramics reinforced by homogeneously distributed octadecylaminefunctionalized single-walled carbon nanotubes (SWCNTs) were synthesized using a casting process, successive pressureless cross-linking and thermolysis. We find that the incorporation of even small amounts of modified SWCNTs leads to a remarkable improvement of mechanical and electrical transport properties of our composites. In particular, we find twofold enhancement of fracture toughness. The Youngs modulus and the hardness show increase by ~ 30 and 15 %, respectively. Furthermore, the electrical conductivity was found to increase more than five orders of magnitude even for a tube content of 0.5 wt%.

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Section: (Figure 5)mentioning

confidence: 99%

Mechanical and electrical properties of polymer-derived Si–C–N ceramics reinforced by octadecylamine – Modified single-wall carbon nanotubes

Shopova-Gospodinova

Burghard

Dufaux

et al. 2011

Composites Science and Technology

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“…The strand-matrix interface is one of the most important factors impacting the strength of a composite, as it controls the condition of load transfer from the matrix to the fibre and vice versa (Steen and Vallés 1997;Fujii and Miyatake 2003). The requirement of an efficient interface is to allow sufficient stress transfer between the fibre and the matrix (Kim 1997).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Frybort¹,

Mauritz²,

Teischinger³

et al. 2012

BioResources

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This study investigates the bonding behaviour of Norway spruce wood strands to a surrounding cement matrix. Effects of wood swelling and shrinking during cement curing were studied by using strands of various thicknesses. The deformation of the spruce wood strands and the surrounding cement matrix, as well as the interface between the wood and the cement were examined using Electronic Laser Speckle Interferometry (ESPI) while applying a pull-out load. Sample deformation was transformed to shear strain maps, showing which side of the strand was tightly bonded to the cement matrix. The analysis of the strain maps proved that all strands were tightly bonded to the cement matrix on only one side. No shear deformation was observed on the loosely bonded side, meaning that there was no adhesion on that side between the wood strand and the cement matrix. Manufacturing of strands results in different surface characteristics and surface roughness. Bringing together the ESPI results with the roughness measurements, it was shown that only the comparably rougher surface adheres to the cement matrix. In a cement bonded composite (CBC) made of lignocellulosics to a greater or lesser extent, only half of the contact area is therefore able to transfer load.

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“…Theoretical analyses of stress-transfer in unidirectional fiber reinforced composites (see for e. g., Nairn (1997); Upadhyaya and Kumar (2015b) ) and stress-transfer through partially debonded interfaces in three-phase composites (Wu et al, 1998(Wu et al, , 1999 provide potential guidance for analyzing pullout performance and interfacial debonding behavior of adhesive anchors due to similar nature of these problems. In an effort to understand the stresstransfer through the adhesive interfaces, several analytical solutions have J o u r n a l P r e -p r o o f Journal Pre-proof been proposed for bonded systems (Yang et al, 2008;Ballarini et al, 1986;Gesoglu et al, 2014;Steen and Valles, 1998).…”

Section: Introductionmentioning

confidence: 99%

Pullout characteristics of functionally graded and degraded adhesive anchors

Kumar

Khan

Wardle

et al. 2023

European Journal of Mechanics - A/Solids

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Interfacial bond conditions and stress distribution in a two-dimensionally reinforced brittle-matrix composite

Cited by 11 publications

References 44 publications

Mechanical and electrical properties of polymer-derived Si–C–N ceramics reinforced by octadecylamine – Modified single-wall carbon nanotubes

Mechanical and electrical properties of polymer-derived Si–C–N ceramics reinforced by octadecylamine – Modified single-wall carbon nanotubes

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Pullout characteristics of functionally graded and degraded adhesive anchors

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