Analytical and numerical study of failure in composite plates

Samuel N. Mula, Afonso M.S. Leite and Maria A.R. Loja

Abstract

In the present work, several studies related to the failure of laminated composite material plates are discussed. To carry out those studies, two models were developed: an analytical one, implemented in a symbolic computation system, MAPLE(R) and a numerical one implemented in ANSYS(R). The main objective is the calculation of the load that originates the first ply failure in the plates studied, considering the criteria of Maximum stress and Tsai-Wu. Five case studies were considered, with different stacking sequences, different lamina thicknesses, and different arrangements and materials. Symmetrical and non-symmetrical layups were considered. The load cases comprise uniaxial and biaxial in-plane forces. The expected tension-extension and tension-bending coupling effects were also discussed.

Key Words

composite material; failure criteria; failure index; laminated plates

Address

Samuel N. Mula: CIMOSM, Centro de Investigação em Modelação e Otimização de Sistemas Multifuncionais, ISEL, IPL, Instituto Superior de Engenharia de Lisboa, Av. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal Afonso M.S. Leite: CIMOSM, Centro de Investigação em Modelação e Otimização de Sistemas Multifuncionais, ISEL, IPL, Instituto Superior de Engenharia de Lisboa, Av. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal Maria A.R. Loja: CIMOSM, Centro de Investigação em Modelação e Otimização de Sistemas Multifuncionais, ISEL, IPL, Instituto Superior de Engenharia de Lisboa, Av. Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal; IDMEC, IST-Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal

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