On the interfacial behaviour of a glass/epoxy composite during a micro-indentation test: assessment of interfacial shear strength using reduced indentation curves

The aim of this paper is to evaluate the Mode II interfacial fracture toughness and interfacial shear strength of Typha spp. fiber/PLLA and Typha spp. fiber/epoxy composite by using a double shear stress method with 3 fibers model composite. The surface condition of the fiber and crack propagation at the interface between the fiber and the matrix are observed by scanning electron microscope (SEM). Alkali treatment on Typha spp. fiber can make the fiber surface coarser, thus increasing the value of interfacial fracture toughness and interfacial shear strength. Typha spp. fiber/epoxy has a higher interfacial fracture value than that of Typha spp. fiber/PLLA. Interfacial fracture toughness on Typha spp. fiber/PLLA and Typha spp. fiber/epoxy composite model specimens were influenced by the matrix length, fiber spacing, fiber diameter and bonding area. Furthermore, the interfacial fracture toughness and the interfacial fracture shear stress of the composite model increased with the increasing duration of the surface treatment.

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Interfacial Shear Strength of Thin Polymeric Coatings on Glass

MRS Proceedings ◽

10.1557/proc-130-237 ◽

1988 ◽

Vol 130 ◽

Cited By ~ 3

Author(s):

J. E. Ritter ◽

L. Rosenfeld ◽

M. R. Lin ◽

T. J. Lardner

Keyword(s):

Shear Strength ◽

Interfacial Shear Strength ◽

Indentation Test ◽

Interfacial Shear ◽

Polymeric Coatings ◽

Shear Tests ◽

Glass Substrates ◽

Lap Shear ◽

Order Of Magnitude ◽

Intrinsic Strength

AbstractThe interfacial adhesive shear strengths of epoxy and acrylate coatings on glass substrates were measured by the indentation and lap shear tests. The lap shear strengths were about an order of magnitude less and exhibited considerably more variability than those measured by indentation. It is believed that the lap shear strength is controlled by large processing flaws (pores in this study); whereas, the indentation test measures the “intrinsic” strength of the coating.

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Improvement in interfacial shear strength and fracture toughness for carbon fiber reinforced epoxy composite by fiber sizing

Polymer Composites ◽

10.1002/pc.22685 ◽

2013 ◽

Vol 35 (3) ◽

pp. 482-488 ◽

Cited By ~ 22

Author(s):

WenBo Liu ◽

Shu Zhang ◽

Bichen Li ◽

Fan Yang ◽

WeiCheng Jiao ◽

...

Keyword(s):

Fracture Toughness ◽

Shear Strength ◽

Carbon Fiber ◽

Interfacial Shear Strength ◽

Epoxy Composite ◽

Interfacial Shear ◽

Fiber Reinforced ◽

Carbon Fiber Reinforced

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Processing and mechanical behavior of SiC fiber-reinforced Si3N4 composites

Journal of Materials Research ◽

10.1557/jmr.1991.1926 ◽

1991 ◽

Vol 6 (9) ◽

pp. 1926-1936 ◽

Cited By ~ 7

Author(s):

J-M. Yang ◽

Steven T.J. Chen ◽

S.M. Jeng ◽

R.B. Thayer ◽

J-F. LeCoustaouec

Keyword(s):

Shear Strength ◽

Mechanical Behavior ◽

Interfacial Shear Strength ◽

Indentation Test ◽

Interfacial Properties ◽

Interfacial Shear ◽

Bending Test ◽

Frictional Stress ◽

Propagation Behavior ◽

Sic Fiber

The interfacial properties and mechanical behavior of the SCS-6/Si3N4 composites fabricated by hot pressing from powder lay-up and tape lay-up techniques were studied. Interfacial shear strength and frictional stress were measured using an indentation test. Fracture toughness and work-of-fracture were measured using a three-point bending test on a chevron-notched specimen. The influence of interfacial shear strength on the toughening mechanisms and crack propagation behavior were investigated. The results indicate that the processing routes and fiber orientation will affect the interfacial properties, which in turn have a significant influence on mechanical properties.

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