Simulation of delamination under impact using a global–local method in explicit dynamics

Abstract

Despite of their interest, multi-scale methods based on domain decomposition are rarely used or even implemented within legacy codes. The reason is that their implementation is very demanding and that the robustness of their performance in industrial applications is questionable. In order to try to overcome these limitations, we recently adapted to the case of explicit dynamics a global-local multi-scale method (Bettinotti et al., 2014b). So far, the method has been implemented in a Matlab code and validated on simple elastic cases. In this paper, we present the implementation of the method in Abaqus/Explicit using its co-simulation features to couple two separate Abaqus/Explicit analyses, running at different scales. The approach is illustrated in the case of the simulation of delamination under high velocity impact. A key aspect of the method, if compared to the one based on domain decomposition, is the fact that the global model covers the whole structure. This feature has been used to treat contact at the global level only, which greatly simplifies the implementation and enhances the computational performance of the method. The effectiveness of the method has been verified by comparing the results with other approaches already available in Abaqus/Explicit: the tie constraint between different regions of the model and the sub-modeling approach.

A non-intrusive global/local approach applied to phase-field modeling of brittle fracture

“…Recently, the framework has been also extended to ductile (elasto-plastic) fracture [17][18][19][20][21][22], pressurized fracture in elastic and porous media [23,24], fracture in films [25] and shells [26][27][28], and multi-field fracture [29][30][31][32][33][34][35][36]. Non-intrusive global/local approaches have also been applied to a quite large number of situations: the computation of the propagation of cracks in a sound model using the extended finite element method (XFEM) [37], the computation of assembly of plates introducing realistic non-linear 3D modeling of connectors [38], the extension to non-linear domain decomposition methods [39] and to explicit dynamics [40,41] with an application to the prediction of delamination under impact using Abaqus [42]. Alternative strategies can be derived from the Partition of Unity Method [43,44].…”

Progressive delamination analysis through two-way global-local coupling approach preserving energy dissipation for single-mode and mixed-mode loading

“…Delamination was modeled with the modified virtual crack closure technique (MVCCT). Bettinotti et al [27] conducted a numerical analysis for a composite panel under high-velocity impact. A local model was incorporated into the global model.…”

Finite element evaluation of the effects of curvature in Lamb waves for composites structural health monitoring

“…: quasi steady state solution) the explicit method starts having stability problems (Jiao & Jin, 2001) and the implicit method becomes more advantageous. Usually, explicit analysis is very useful for issues where fast loading happens, including explosions, impact or progressive failures (Rahnavard et al, 2018 andBettinotti et al, 2017). Additionally, implicit dynamic analysis is applied to quasi-static problems such as cyclic pushover analysis, force-control, displacement-control, and thermal analyzes (Lee et al, 2017, Rahnavard et al, 2017.…”