Virtual characterization of nonlocal continuum damage model parameters using a high fidelity finite element model

Reiner, Johannes; Xu, Xiaodong; Zobeiry, Navid; Vaziri, Reza; Hallett, Stephen R.; Wisnom, Michael R.

Abstract

A virtual finite element framework is presented to provide the transition from a high fidelity model to a more computationally efficient continuum model for simulating fibre-dominated damage behavior in composite laminates subjected to tensile loadings. The high fidelity method in LS-DYNA is based on the use of cohesive interface elements to simulate both intra-laminar matrix cracks and delamination. Applied to IM7/8552 carbon fibre reinforced plastic laminates in over-height compact tension (OCT) tests, this modeling strategy is used to determine the effective damage parameters for the nonlocal continuum damage model, CODAM2, implemented as MAT219 in LS-DYNA. The prediction of CODAM2 is thoroughly assessed against quantitative and qualitative results obtained from the high fidelity model. Furthermore, the characterized CODAM2 model is applied to simulations of large-scale OCT, open–hole tension (OHT) and center-notched tension (CNT) specimens and results are compared to corresponding experimental data. Due to its nonlocal feature to track the crack trajectory without the need to align the mesh with fibre orientation, the continuum damage model CODAM2 is able to accurately predict the structural response in all large-scale OCT, OHT and CNT test cases with significant computational efficiency.

• Journal Article Type: Article
• Acceptance Date: Sep 28, 2020
• Online Publication Date: Oct 9, 2020
• Publication Date: Jan 15, 2021
• Deposit Date: Feb 15, 2021
• Publicly Available Date: Oct 10, 2021
• Journal: Composite Structures
• Print ISSN: 0263-8223
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 256
• Article Number: 113073
• DOI: https://doi.org/10.1016/j.compstruct.2020.113073
• Keywords: Civil and Structural Engineering; Ceramics and Composites
• Public URL: https://uwe-repository.worktribe.com/output/7094420
• Additional Information: This article is maintained by: Elsevier; Article Title: Virtual characterization of nonlocal continuum damage model parameters using a high fidelity finite element model; Journal Title: Composite Structures; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.compstruct.2020.113073; Content Type: article; Copyright: © 2020 Elsevier Ltd. All rights reserved.