Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A 3D constitutive model for modelling milling induced damage in composite laminates
Submission Author:
Sergio Moni , SP
Co-Authors:
Sergio Moni , Mauricio Donadon, Alfredo Faria
Presenter: Sergio Moni
doi://10.26678/ABCM.COBEM2023.COB2023-1793
Abstract
Finite element models offer a cost-effective and innovative solution for virtually design machining strategies and predict failure modes in composite structures. This work introduces an energy-based formulation for a three-dimensional ply failure model to investigate the milling behaviour of UD carbon fibre laminate, using a VUMAT subroutine. This damage model integrates a continuum damage mechanics (CDM) with cohesive interface elements to predict both intra/translaminar and interlaminar failure modes. At the ply level, the CDM model takes in account in-plane shear failure, fibre failure (in tension/compression), and matrix cracking (in tension/compression). Machining-induced delamination is assessed using native cohesive interface elements, whose formulation is based on a bilinear traction-separation law, predicting the initiation and propagation of delaminations. Milling forces are predicted at each increment of time during the simulations. Experimental tests are conducted with two different cutting geometric tools under dry conditions to validate the model predictions. In general, a fairly good correlation between numerical predictions and experimental data in terms of milling force and damage patterns was found.
Keywords
CCM model, milling, Composite, Finite Element Method
