A new damage model for composite laminates

Author(s)

Ribeiro, Marcelo Leite ^[1] ; Tita, Volnei ^[1] ; Vandepitte, Dirk ^[2]

Affiliation

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

^[2] Katholieke Univ Leuven, Machine Design & Automat PMA Sect, Louvain - Belgium

• Document type: Journal article
• Source: COMPOSITE STRUCTURES; v. 94, n. 2, p. 635-642, JAN 2012.
• Web of Science Citations: 26

Abstract

Aircraft composite structures must have high stiffness and strength with low weight, which can guarantee the increase of the pay-load for airplanes without losing airworthiness. However, the mechanical behavior of composite laminates is very complex due the inherent anisotropy and heterogeneity. Many researchers have developed different failure progressive analyses and damage models in order to predict the complex failure mechanisms. This work presents a damage model and progressive failure analysis that requires simple experimental tests and that achieves good accuracy. Firstly, the paper explains damage initiation and propagation criteria and a procedure to identify the material parameters. In the second stage, the model was implemented as a UMAT (User Material Subroutine), which is linked to finite element software, ABAQUS (TM), in order to predict the composite structures behavior. Afterwards, some case studies, mainly off-axis coupons under tensile or compression loads, with different types of stacking sequence were analyzed using the proposed material model. Finally, the computational results were compared to the experimental results, verifying the capability of the damage model in order to predict the composite structure behavior. (C) 2011 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 09/00544-5 - STUDY OF DAMAGE AND PROGRESSIVE FAILURE MODELS FOR COMPOSITE STRUCTURES
• Grantee: Volnei Tita
• Support Opportunities: Regular Research Grants