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


Autoria(s): Muñoz, R.; Martínez, V.; Sket, Federico; González Martínez, Carlos Daniel; Llorca Martinez, Francisco Javier
Data(s)

01/04/2014

Resumo

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

Formato

application/pdf

Identificador

http://oa.upm.es/35462/

Idioma(s)

eng

Publicador

E.T.S.I. Caminos, Canales y Puertos (UPM)

Relação

http://oa.upm.es/35462/2/INVE_MEM_2014_191455.pdf

http://www.sciencedirect.com/science/article/pii/S1359835X14000050

info:eu-repo/semantics/altIdentifier/doi/10.1016/j.compositesa.2014.01.003

Direitos

http://creativecommons.org/licenses/by-nc-nd/3.0/es/

info:eu-repo/semantics/openAccess

Fonte

Composites Part A: Applied Science and Manufacturing, ISSN 1359-835X, 2014-04, Vol. 59

Palavras-Chave #Materiales
Tipo

info:eu-repo/semantics/article

Artículo

PeerReviewed