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MECSOL 2019
7th International Symposium on Solid Mechanics
A Multiaxial Fatigue Damage Model for Composite Laminates
Submission Author:
Lucas Amaro de Oliveira , SP
Co-Authors:
Lucas Amaro de Oliveira, Rafael Ricardo Ribeiro de Souza, Mauricio Donadon
Presenter: Lucas Amaro de Oliveira
doi://10.26678/ABCM.MECSOL2019.MSL19-0084
Abstract
This paper presents a novel damage mechanics based failure model that enables prediction of fatigue life and residual strength in composite structures under multiaxial loading. The approach herein proposed does not discretize every load cycle but instead takes an envelope loading whereby the numerical load remains constant at a maximum load level and the number of cycles is obtained from a given elapsed time defined within a pseudo-time framework. The proposed formulation is based on the smeared cracking approach accounting for damage propagation due to static and fatigue loadings. The static and fatigue damage evolution laws are defined based on the Continuum Damage Mechanics (CDM) approach and Paris-law parameters, respectively. Furthermore, the formulation combines damage mechanics and fracture mechanics within a unified approach enabling the control of the energy dissipated in each loading cycle.
Keywords
Damage Mechanics, Lumped Damage Mechanics, fatigue, Finite Elements
