Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Influence of Failure on the Effective Properties of Laminate Composites via Finite Element Analyses
Submission Author:
Bruno Guilherme Christoff , SC
Co-Authors:
Bruno Guilherme Christoff, Humberto Brito, Marcelo Leite Ribeiro, Volnei Tita
Presenter: Bruno Guilherme Christoff
doi://10.26678/ABCM.MECSOL2019.MSL19-0141
Abstract
This work aims to investigate the influence of failure on the effective properties of composites by the use of Finite Element Analyses in a commercial package. A 0-90 periodically laminated composite, modeled as a representative volume element (RVE), is chosen for the analysis. The homogenization is performed by analyzing six load cases with prescribed loads, or displacements, and boundary conditions and by the use of a theorem of averages. Initially, three analyses are performed. The first one with an intact material and prescribed loads. The second one with fails and prescribed loads. The third one with a crack in the 90 layer and prescribed displacements. The results show a consistency for the first and third cases and a physical inconsistency for the second case. The results show that the method must be use with some caution. An alternative approach is proposed, the use of asymptotic homogenization within a commercial finite element package. This alternative shows very consistent results by comparison with the commonly homogenization approaches found into literature. And, there is a discussion about the size of the RVE as well as about the application of adequate boundary conditions. The main difficulties and advantages of all approaches are pointed all.
Keywords
Homogenization, Effective properties, laminate composites, Finite Element Analysis
