A methodology to measure the interface shear strength by means of the fiber push-in test

By M. Rodríguez, Jon Molina-Aldareguia, C. González, Javier Llorca. 2012

151 citations recorded by the source corpus.

Abstract A methodology is presented to measure the fiber/matrix interface shear strength in composites. The strategy is based on performing a fiber push-in test at the central fiber of highly-packed fiber clusters with hexagonal symmetry which are often found in unidirectional composites with a high volume fraction of fibers. The mechanics of this test was analyzed in detail by means of three-dimensional finite element simulations. In particular, the influence of different parameters (interface shear strength, toughness and friction as well as fiber longitudinal elastic modulus and curing stresses) on the critical load at the onset of debonding was established. From the results of the numerical simulations, a simple relationship between the critical load and the interface shear strength is proposed. The methodology was validated in an unidirectional C/epoxy composite and the advantages and limitations of the proposed methodology are indicated.

Subfields: Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/128a5aab61c83041dcb377a74cf36f3b52a47bf1

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In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

Computational micromechanics of the transverse and shear behavior of unidirectional fiber reinforced polymers including environmental effects (2017, methodology): “In addition, due to the lack of experimental data, the interface fracture 250 energies in the shear modes were set equal to the matrix cracking fracture energy, GIIc = GIIIc = 251 Gm = 100J/m 2, a value similar to the one used in [34].”
The role of interfacial properties on the intralaminar and interlaminar damage behaviour of unidirectional composite laminates: Experimental characterization and multiscale modelling (2018, methodology): “In this work, the interfacial shear strength (IFSS), 𝜏𝐼𝐹𝑆𝑆, was determined from the load-displacement curves provided by the nanoindenter following the methodology developed by Rodríguez et al [39].”