Optimization of hybrid polymer composites under uniaxial traction

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Fábio Monteiro Conde (Autor) Outra; Pedro Gonçalves Coelho (Autor) Outra; Rodrigo Paiva Tavares (Autor) Outra; Pedro Castro Camanho (Autor) FEUP; José Miranda Guedes (Autor) Outra; Helder Carriço Rodrigues (Autor) Outra

Revista

Título: Engineering Computations

Vol. 35 Nº 2

Páginas: 904-931

ISSN: 0264-4401

Editora: Emerald

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

INSPEC

Outras Informações

ID Authenticus: P-00N-YFM

DOI: 10.1108/ec-11-2017-0427

Abstract (EN): Purpose - This study aims to achieve a "pseudo-ductile" behaviour in the response of hybrid fibre reinforced composites under uniaxial traction by solving properly formulated optimization problems. Design/methodology/approach - The composite material model is based on the combination of different types of fibres (with different failure strains or strengths) embedded in a polymer matrix. The composite failure under tensile load is predicted by analytical models. An optimization problem formulation is proposed and a Genetic Algorithm is used. Multi-objective optimization problems balancing failure strength and ductility criteria are solved providing optimal mixtures of fibres whose properties may come either from a pre-defined list of materials, currently available in the market, or simply assuming their continuum variation within predefined bounds, in an attempt to attain unprecedented performance levels. Findings - Optimal solutions of hybrid fibre reinforced composites exhibiting pseudo-ductile behaviour are presented. It is found that a fibre made from a material exhibiting relatively low stiffness combined with high strength is preferred for hybridization. Furthermore, the ratio of the average failure/critical strains between the low and high elongation fibres to be hybridized must be equal or greater than two. Originality/value - Typically, a ductile failure is an inherent property of metals, that is, their typical response curve after the linear (elastic) region exhibits a yielding plateau still followed by an increase in stress till collapse. In stark contrast, composite materials exhibit (under some loading conditions) brittle failure that may limit their widespread usage. Therefore, a "pseudo-ductility" in composites is valued and targeted through optimization which is the main original contribution here.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 28