About this Abstract |
Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Presentation Title |
Development of a Fatigue Model for Prediction of Bondline Failure in Polymer Matrix Composites (PMCs) Using Abaqus and the Extended Finite Element Method |
Author(s) |
Louis Sponton, Guillaume Seon, Andrew Makeev |
On-Site Speaker (Planned) |
Louis Sponton |
Abstract Scope |
Adhesively bonded Polymer Matrix Composites (PMCs) are a promising alternative to using mechanical fasteners in aircraft composite structures, with the potential for streamlining the manufacturing process of unitized designs and achieving significant weight savings. However, challenges arise due to the susceptibility to defects and complex failure mechanisms, including the quasi-brittle material behavior of polymeric adhesives. These factors complicate the qualification process and hinder a widespread use of adhesive joints. To address these challenges, high-fidelity computational methods capable of accurately simulating bondline failure are needed to support experimental testing. In this context, a continuous/discontinuous framework was recently implemented using Abaqus Finite Element (FE) software to predict damage initiation and fracture propagation within adhesive bondlines under quasi-static conditions. The method utilizes a combination of non-local Continuum Damage Mechanics (CDM) and the Extended Finite Element Method (XFEM). The primary objective of this work is to extend this model to predict bondline failure under fatigue loading. Notable challenges include the absence of fatigue capability in the Abaqus built-in X-FEM using a cohesive segment approach, as well as the lack of subroutines allowing full control of the X-FEM damage degradation law. In the preliminary work, a strategy to address these limitations is presented and illustrated using a two-dimensional double-cantilever beam (DCB) specimen. Additionally, enhancements incorporating non-local features to compute the crack growth rate are considered to improve the model’s robustness. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |