Investigation of interfacial shear strength in a SiC fibre/Ti-24Al-11Nb composite by a fibre push-out technique

1989 ◽  
Vol 8 (12) ◽  
pp. 1451-1454 ◽  
Author(s):  
J. I. Eldridge ◽  
P. K. Brindley
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Push Out

scholarly journals The Impact of Carbon Nanofibres on the Interfacial Properties of CFRPs Produced with Sized Carbon Fibres

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3457
Author(s):  
Zhenxue Zhang ◽  
Xiaoying Li ◽  
Simon Jestin ◽  
Stefania Termine ◽  
Aikaterini-Flora Trompeta ◽  
...  
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Fibre Diameter ◽  
Sheet Thickness ◽  
Interfacial Properties ◽  
Interfacial Shear ◽  
Nanoindentation Test ◽  
Carbon Nanofibres ◽  
The Impact ◽  
Push Out

In this work, different amounts of CNFs were added into a complex formulation to coat the CFs surfaces via sizing in order to enhance the bonding between the fibre and the resin in the CF-reinforced polymer composites. The sized CFs bundles were characterised by SEM and Raman. The nanomechanical properties of the composite materials produced were assessed by the nanoindentation test. The interfacial properties of the fibre and resin were evaluated by a push-out method developed on nanoindentation. The average interfacial shear strength of the fibre/matrix interface could be calculated by the critical load, sheet thickness and fibre diameter. The contact angle measurements and resin spreadability were performed prior to nanoindentation to investigate the wetting properties of the fibre. After the push-out tests, the characterisation via optical microscopy/SEM was carried out to ratify the results. It was found the CFs sizing with CNFs (1 to 10 wt%) could generally increase the interfacial shear strength but it was more cost-effective with a small amount of evenly distributed CNFs on CFs.

scholarly journals Comparison of push-in and push-out tests for measuring interfacial shear strength in nano-reinforced composite materials

2015 ◽  
Vol 50 (12) ◽  
pp. 1651-1659 ◽  
Author(s):  
Carlos Medina M ◽  
Jon M Molina-Aldareguía ◽  
Carlos González ◽  
Manuel F Melendrez ◽  
Paulo Flores ◽  
...  
Keyword(s):  
Shear Strength ◽  
Composite Materials ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Reinforced Composite ◽  
Push Out

scholarly journals Investigation on the interfacial properties of CNTs sized carbon fibres in epoxy resin using push-out method via nano-indentation technique

2021 ◽  
Vol 349 ◽  
pp. 01007
Author(s):  
Zhenxue Zhang ◽  
Xiaoying Li ◽  
Hanshan Dong ◽  
Simon Jestin ◽  
Stefania Termine ◽  
...  
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Indentation Creep ◽  
Indentation Hardness ◽  
Carbon Fibres ◽  
Complex Formulation ◽  
Reduced Modulus ◽  
Push Out ◽  
Fibre Matrix

In this work, the carbon fibres (CFs) surfaces were modified via sizing and coated with a very thin layer of a complex formulation including carbon nanotubes (CNTs). A push-out method was developed based on nanoindentation to assess the interfacial shear strength of the fibre/matrix. The mechanical properties such as indentation hardness, reduced modulus, indentation displacement and indentation creep of the composite were evaluated by means of the Oliver-Pharr method. The critical load of different composites was measured and the interfacial shear strength (IFSS) was calculated to compare the effect of the CNTs concentration in the sizing solution. Wettability evaluation of the sized fibres was performed prior to nanoindentation to investigate the adhesion of the resin. After push-out testing, characterisation by optical microscopy/SEM was carried out to ratify the results. It was found sizing with a small amount of evenly distributed nano-inclusion on CFs can increase the interfacial shear strength but large amount of sizing could lead to a decrease of the interfacial bonding due to the agglomeration of CNTs on CFs.

Revision of Cemented Fixation and Cement—Bone Interface Strength

1992 ◽  
Vol 206 (1) ◽  
pp. 47-49 ◽  
Author(s):  
A Rosenstein ◽  
W MacDonald ◽  
A Iliadis ◽  
P McLardy-Smith
Keyword(s):  
Shear Strength ◽  
Bone Cement ◽  
Interfacial Shear Strength ◽  
Interface Strength ◽  
Interfacial Shear ◽  
Bone Fixation ◽  
Pmma Bone Cement ◽  
Joint Arthroplasties ◽  
Pmma Cement ◽  
Push Out

Interfacial shear strength between poly(methyl methacrylate) (PMMA) bone cement and cancellous bone was measured in bone samples from human proximal femora. Samples were prepared with fresh cement-bone, fresh cement inside a mantle of existing cement and with fresh cement-revised bone surfaces. Push-out tests to measure shear strength caused failure only at bone-cement interfaces; revised bone interfaces were 30 per cent weaker (P < 0.02) than primary interfaces. The clinical relevance is that revision of cemented joint arthroplasties may necessitate removal of components with sound cement-bone fixation. The practice of removing all traces of PMMA cement may not yield the optimal fixation; adhesion of fresh cement to freshly prepared surfaces of the existing cement might also be considered where circumstances are favourable.

scholarly journals Enhanced Interfacial Shear Strength and Critical Energy Release Rate in Single Glass Fiber-Crosslinked Polypropylene Model Microcomposites

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2552 ◽  
Author(s):  
Uwe Gohs ◽  
Michael Mueller ◽  
Carsten Zschech ◽  
Serge Zhandarov
Keyword(s):  
Shear Strength ◽  
Electron Beam ◽  
Energy Release Rate ◽  
Glass Fiber ◽  
Release Rate ◽  
Interfacial Shear Strength ◽  
Glass Fibers ◽  
Critical Energy ◽  
Interfacial Shear ◽  
Critical Energy Release Rate

Continuous glass fiber-reinforced polypropylene composites produced by using hybrid yarns show reduced fiber-to-matrix adhesion in comparison to their thermosetting counterparts. Their consolidation involves no curing, and the chemical reactions are limited to the glass fiber surface, the silane coupling agent, and the maleic anhydride-grafted polypropylene. This paper investigates the impact of electron beam crosslinkable toughened polypropylene, alkylene-functionalized single glass fibers, and electron-induced grafting and crosslinking on the local interfacial shear strength and critical energy release rate in single glass fiber polypropylene model microcomposites. A systematic comparison of non-, amino-, alkyl-, and alkylene-functionalized single fibers in virgin, crosslinkable toughened and electron beam crosslinked toughened polypropylene was done in order to study their influence on the local interfacial strength parameters. In comparison to amino-functionalized single glass fibers in polypropylene/maleic anhydride-grafted polypropylene, an enhanced local interfacial shear strength (+20%) and critical energy release rate (+80%) were observed for alkylene-functionalized single glass fibers in electron beam crosslinked toughened polypropylene.

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