Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
An Energy Based Failure Model to Predict the Crushing Behavior of Unidirectional Composite Laminates
Submission Author:
Sérgio Augusto Capasciutti de Oliveira , SP
Co-Authors:
Sérgio Augusto Capasciutti de Oliveira, Mauricio Donadon
Presenter: Sérgio Augusto Capasciutti de Oliveira
doi://10.26678/ABCM.MECSOL2019.MSL19-0015
Abstract
Crashworthiness is an application of crushing loads in structures, where energy of crash shall be absorbed through the failure mechanisms of the material used in such structures. In the case of composites, few failure mechanisms shall be taken into account in order to propose a computational failure damage based on energy balance to comply with the physical problem. In this work, a continuum damage mechanics based failure model is proposed to predict the crushing behavior of UD composite laminates. The model enables prediction typical failure mechanisms commonly observed in UD laminates under crush loading with high-fidelity by incorporating into its formulation a set of phenomenological stress-based criteria to detect damage initiation and fracture mechanics combined with an element deletion strategy to predict damage progression. A VUMAT subroutine was implemented into ABAQUS/Explicit finite element model (FEM) to access the problem through the investigation of unidirectional carbon/epoxy laminates with wedge shaped tip triggers.
Keywords
Crashworthiness, energy, Crushing, failure, Impact
