Intraply failure criterion for unidirectional fiber reinforced composites by means of asymptotic homogenization

Autor(es)

de Macedo, Rafael Quelho ; Luiz Ferreira, Rafael Thiago ; Guedes, Jose Miranda ; Donadon, Mauricio Vicente

• Tipo de documento: Artigo Científico
• Fonte: COMPOSITE STRUCTURES; v. 159, p. 335-349, JAN 1 2017.
• Citações Web of Science: 5

Resumo

This work focuses on the determination of failure envelopes of unidirectional fiber reinforced composites. A two scale analysis is considered and the mathematical theory of asymptotic homogenization is applied to model the problem. For a given stress applied to the macro level, it is possible to assess stresses at the micro level domain. Three regions of the micro level are considered: matrix, fiber and the interface between them, and each region is ruled by its own failure criterion. A methodology to determine failure of composites using the homogenization is proposed. In the methodology, the strengths of the composite are used to determine the strengths of the constituents: a curve fitting adjustment is applied to calculate the strengths of the matrix and an analytical procedure is used to obtain the strengths of the fiber and interface. Then, the strengths of the constituents are used to evaluate failure criteria at the micro level, and the numerical failure envelopes are built. The advantage of the proposed methodology is that it is capable of calculating numerical failure envelopes with good approximation to experimental envelopes and also to the Puck \& Schurmann criteri, requiring only five unidirectional strengths of the composite as inputs. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/00929-2 - Critério de falha para materiais compostos com reforço de fibras tecidas construído via técnicas de homogenização assintótica
• Beneficiário: Rafael Quelho de Macedo
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 14/26377-6 - Critério de falha para materiais compostos com reforço de fibras tecidas construído via técnicas de homogenização assintótica
• Beneficiário: Rafael Quelho de Macedo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 15/00159-5 - Projeto hierárquico de compostos para produção por impressão tridimensional
• Beneficiário: Rafael Thiago Luiz Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular