The Effects of Interphase Properties on Interfacial Shear Strength in Polymer Matrix Composites

1994 ◽  
Vol 45 (1-4) ◽  
pp. 105-124 ◽  
Author(s):  
N. R. Sottos ◽  
L. Li ◽  
G. Agrawal
Keyword(s):  
Shear Strength ◽  
Polymer Matrix ◽  
Interfacial Shear Strength ◽  
Polymer Matrix Composites ◽  
Interfacial Shear ◽  
Matrix Composites

Interfacial Shear Strength of Ion Beam Modified UHMW-PE Fibers in Epoxy Matrix Composites

1989 ◽  
Vol 153 ◽  
Author(s):  
A. Ozzello ◽  
D. S. Grummon ◽  
L. T. Drzal ◽  
J. Kalantar ◽  
I-H. Loh ◽  
...  
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Polymer Matrix Composites ◽  
Ion Beam ◽  
Substantial Improvement ◽  
Interfacial Shear ◽  
Matrix Composites ◽  
Beam Surface ◽  
Strength And Stiffness ◽  
Ultra High Molecular Weight

AbstractUltra-high molecular weight polyethylene fibers possess exceptional strength and stiffness combined with low density. Their use as reinforcements in polymer matrix composites has, however, been limited by poor fiber adhesion. In the present study, individual fibers of UHMW-PE (Allied-Signal SPECTRA-1000) were modified by direct implantation of N+, Ti+ and Ar+ ions, at energies between 30 and 100 KeV, to doses ranging between 1x1014 and lx1015 ions/cm2. Fiber tensile strength was generally unaffected by these irradiations. Single-fiber droplet pull-off tests using DGEBA Epoxy with m-PDA curing agent have shown that ion beam surface modification of the fibers can give an increase of over 300% in interfacial shear strength (ISS). The improvements were found to vary with dose but were relatively insensitive to implant species. TEM observation of transverse microtomed sections confirmed a substantial improvement in fiber-matrix adhesion for ion beam modified UHMW-PE composites.

scholarly journals Plasma Nanocoatings Developed to Control the Shear Strength of Polymer Composites

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1188 ◽  
Author(s):  
Zvonek ◽  
Sirjovova ◽  
Branecky ◽  
Plichta ◽  
Skacel ◽  
...  
Keyword(s):  
Shear Strength ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Glass Fibers ◽  
Matrix Composites ◽  
Suitable Material ◽  
Oxygen Fraction ◽  
Short Beam ◽  
Beam Shear ◽  
Polyester Composite

All reinforcements for polymer-matrix composites must be coated with a suitable material in the form of a thin film to improve compatibility and interfacial adhesion between the reinforcement and the polymer matrix. In this study, plasma nanotechnology was used to synthetize such functional nanocoatings using pure tetravinylsilane (TVS) and its mixtures with oxygen gas (O2) as precursors. The plasma-coated glass fibers (GFs) were unidirectionally embedded in a polyester resin to produce short composite beams that were analyzed by a short-beam-shear test to determine the shear strength characterizing the functionality of the nanocoatings in a GF/polyester composite. The developed plasma nanocoatings allowed controlling the shear strength between 26.2–44.1 MPa depending on deposition conditions, i.e., the radiofrequency (RF) power and the oxygen fraction in the TVS/O2 mixture. This range of shear strength appears to be sufficiently broad to be used in the design of composites.

scholarly journals Hi-NicalonTM Fiber-Reinforced CVI-SiC Matrix Composites: II Interfacial Shear Strength and Its Effects on the Flexural Properties

2002 ◽  
Vol 43 (10) ◽  
pp. 2574-2577 ◽  
Author(s):  
Wen Yang ◽  
Hiroshi Araki ◽  
Akira Kohyama ◽  
Yutai Katoh ◽  
Quanli Hu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Flexural Properties ◽  
Matrix Composites ◽  
Fiber Reinforced

Direct measurement of fiber bridging in notched glass-ceramic-matrix composites

2006 ◽  
Vol 21 (5) ◽  
pp. 1150-1160 ◽  
Author(s):  
Konstantinos G. Dassios ◽  
Costas Galiotis
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Ceramic Matrix Composites ◽  
Interfacial Shear ◽  
Matrix Composites ◽  
Fiber Failure ◽  
Laser Raman ◽  
Notch Length ◽  
The Difference ◽  
Bridging Fibers

A novel, high-resolution remote Raman microscope was used for the direct in situ assessment of deformation on bridging fibers in a double-edge-notched SiC-Nicalon reinforced ceramic-glass matrix composite at various stages of monotonic tensile loading. The effect of notch length on the bridging strain profiles obtained by individually probing a large number of fibers across the bridged ligament of the composite was investigated. Bridging strain measurements in the microscale are used to identify the role and sequence of the failure micromechanisms developing within the bridging zone and are compared with their macromechanically derived counterparts. The difference of 25% in failure strain between the as-received fiber and the maximum value obtained on composite-fibers through laser Raman microscopy (LRM), is attributed to the different patterns of fiber failure in composites as compared to the techniques used for fibers characterization such as monofilament and bundle testing in air. This article demonstrates how the LRM-strain data can be utilized to obtain a direct, microscale measure of the interfacial-shear strength of the composite. The obtained interfacial shear strength (ISS) value of 7 MPa compares well with the macromechanically predicted value and offers a much higher precision compared to other experimental techniques.

Sign in / Sign up

Export Citation Format

Share Document