Effective properties evaluation for smart composite materials with imperfect fiber-matrix adhesion

Autor(es)

Tita, Volnei ^[1] ; de Medeiros, Ricardo ^[1] ; Marques, Flavio D. ^[1] ; Moreno, Mariano E. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Aeronaut Engn, BR-13573120 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Ctr Exact Sci & Technol, Dept Mech Engn, BR-13560 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF COMPOSITE MATERIALS; v. 49, n. 29, p. 3683-3701, DEC 2015.
• Citações Web of Science: 3

Resumo

A numerical approach is proposed to evaluate the effective properties of piezoelectric fibers embedded in a nonpiezoelectric matrix, considering imperfect contact between fiber and matrix. Firstly, a Representative Volume Element is analyzed via Finite Element Method for different loadings with suitable boundary conditions applied in a unique way. Transversely, isotropic piezoelectric materials with circular and square cross-section fibers are analyzed for square arrangements with different fiber volume fractions as well as with perfect and imperfect contact conditions. The results for circular and square cross-section fibers with perfect contact are compared to the literature data in order to verify the consistency of proposed numerical approach. After that, the results with imperfect contact are discussed, observing the influence of the fiber volume fraction and the level of the imperfection in the fiber-matrix adhesion. Results show that the imperfect contact not only influences the elastic constants, but also the piezoelectric effective values. (AU)

• Processo FAPESP: 12/01047-8 - Desenvolvimento de um critério para previsão da resistência residual de estruturas em material compósito danificadas por impacto
• Beneficiário: Ricardo de Medeiros
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/03645-0 - Cálculo computacional das propriedades médias em compósitos sob condições de contato imperfeito nas interfaces fibra-matriz
• Beneficiário: Volnei Tita
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional