Sociedad Española de Integridad Estructural
Grupo Español de Fractura

Sociedad Española de Integridad Estructural
Grupo Español de Fractura

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ASSESSMENT OF THE MECHANICAL PROPERTIES ON NANOCLAYED POLYMER BASED COMPOSITES

P.N.B. Reis  J.A.M. Ferreira  J.D.M. Costa  S.S. Sauceda  M.O.W. Richardson    

Anales de la Mecánica de la Fractura, nº 27 . 2010 . Pág. -
Ver (.pdf): 84

Resumen: Nanoscale reinforcement provides opportunities for enhancing polymer systems with unique properties and extended performance, leading, not only to an improvement in the mechanical and fatigue properties but also act as a barrier to slow water permeation. This paper presents the results of a current study concerned to the mechanical properties of a polypropylene binder resin enhanced by using nanoclay reinforcement. The study was centred on the potential benefits obtained by the addition of nanoclays on the stiffness, static and fatigue strength, absorbed impact energy and water absorption resistance. Specimens were produced by injection moulding process with up 3% in weight of nanoclay. Nanoclays improve bending stiffness and bending strength. The immersion in water during 40 days increases the stiffness more than 80% and the bending strength about 40% for all the material compositions. The nanoparticles did not affect significantly the impact energy absorbed and the immersion in water causes a reduction of at least 10%. The addition of 3% of nanoclay promotes a negative effect in Gc, while the water immersion improves significantly the strain energy release rate, particularly for nanoclay filled composites. All material configurations exhibit high cyclic creep showing a faster and intense stress release since the first cycles of fatigue. The 3% nanoclayed composite exhibits fatigue strength higher than the unfilled materials.

LocalizaciónPorto

1CCTA/UBI, Electromechanical Engineering Department Rua Marquês de Ávila e Bolama 6201-001Covilhã
CEMUC, Mechanical Engineering Department, University of Coimbra, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788, Coimbra, Portugal.
CEMUC, Mechanical Engineering Department, University of Coimbra, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788, Coimbra, Portugal.
CEMUC, Mechanical Engineering Department, University of Coimbra, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788, Coimbra, Portugal.
RCMI, Department of Mechanical and Design Engineering, University of Portsmouth, England E-mail: Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo.


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