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A methodology to measure the interface shear strength by means of the fiber push-in test
Rodriguez, M. and Molina Aldareguía, Jon M. and González Martínez, Carlos Daniel and Llorca Martinez, Francisco Javier
A methodology to measure the interface shear strength by means of the fiber push-in test.
"Composites Science and Technology", v. 72
||A methodology to measure the interface shear strength by means of the fiber push-in test
Molina Aldareguía, Jon M.
González Martínez, Carlos Daniel
Llorca Martinez, Francisco Javier
|Título de Revista/Publicación:
||Composites Science and Technology
||12 October 2012
||E.T.S.I. Caminos, Canales y Puertos (UPM)
||Ciencia de los Materiales
|Creative Commons Licenses:
||Recognition - No derivative works - Non commercial
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
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