Mechanical behavior and failure micromechanisms of hybrid 3D woven composites in tension

Muñoz, R.; Martínez, V.; Sket, Federico; González Martínez, Carlos Daniel y Llorca Martinez, Francisco Javier (2014). Mechanical behavior and failure micromechanisms of hybrid 3D woven composites in tension. "Composites Part A: Applied Science and Manufacturing", v. 59 ; pp. 93-104. ISSN 1359-835X. https://doi.org/10.1016/j.compositesa.2014.01.003.

Descripción

Título: Mechanical behavior and failure micromechanisms of hybrid 3D woven composites in tension
Autor/es:
  • Muñoz, R.
  • Martínez, V.
  • Sket, Federico
  • González Martínez, Carlos Daniel
  • Llorca Martinez, Francisco Javier
Tipo de Documento: Artículo
Título de Revista/Publicación: Composites Part A: Applied Science and Manufacturing
Fecha: Abril 2014
Volumen: 59
Materias:
Palabras Clave Informales: A. Polymer–matrix composites; A. Hybrid; A. 3-Dimensional reinforcement; X-ray microtomography
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The deformation and failure micromechanisms of a hybrid 3D woven composite were studied in tension. Plain and open-hole composite coupons were tested in tension until failure in the fill and warp directions, as well as fiber tows extracted from the dry fabric and impregnated with the matrix. The macroscopic evolution of damage in the composite coupons was assessed by means of periodic unloading–reloading (to obtain the elastic modulus and the residual strain), whereas the microscopic mechanism were established by means of X-ray computed microtomography. To this end, specimens were periodically removed from the mechanical testing machine and infiltrated with ZnI-containing liquid to assess the main damage modes as a function of the applied strain. The experimental observations and the predictions of an isostrain model were used to understand the key factors controlling the elastic modulus, strength and notch sensitivity of hybrid 3D woven composites in tension. It was found that the full contribution of the glass fibers to the composite strength was not employed, due to the premature fracture of the carbon fibers, but their presence increased the fracture strain and the energy dissipated during fracture. Thus, hybridization of the 3D woven composite led to a notch-insensitive behavior as demonstrated by open-hole tests

Más información

ID de Registro: 35462
Identificador DC: http://oa.upm.es/35462/
Identificador OAI: oai:oa.upm.es:35462
Identificador DOI: 10.1016/j.compositesa.2014.01.003
URL Oficial: http://www.sciencedirect.com/science/article/pii/S1359835X14000050
Depositado por: Memoria Investigacion
Depositado el: 02 Jun 2015 18:15
Ultima Modificación: 02 Jun 2015 18:15
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