A FE-based scheme for computing wave interaction with nonlinear damage and generation of harmonics in layered composite structures

Apalowo, R.P.; Chronopoulos, D.

Abstract

A Finite Element (FE) based scheme is presented for quantifying guided wave interaction with Localised Nonlinear Structural Damage (LNSD) within structures of arbitrary layering and geometric complexity. The through-thickness mode-shape of the structure is obtained through a wave and finite element method. This is applied in a time domain FE simulation in order to generate time harmonic excitation for a specific wave mode. Interaction of the wave with LNSD within the system is computed through an element activation and deactivation iteration. The scheme is validated against experimental measurements and a WFE-FE methodology for calculating wave interaction with damage. Case studies for guided wave interaction with crack and delamination are presented to verify the robustness of the proposed method in classifying and identifying damage.

Citation

Apalowo, R., & Chronopoulos, D. (2019, November). A FE-based scheme for computing wave interaction with nonlinear damage and generation of harmonics in layered composite structures. Paper presented at ICMAT 2020: 14. International Conference on Mechanical Analysis and Testing, London, UK

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: ICMAT 2020: 14. International Conference on Mechanical Analysis and Testing
• Start Date: Nov 19, 2019
• End Date: Nov 20, 2019
• Deposit Date: Dec 12, 2019
• Publicly Available Date: Dec 12, 2019
• Keywords: Layered Structures, Nonlinear Ultrasound, Wave Interaction with Nonlinear Damage, Wave Finite Element, Finite Element
• Public URL: https://nottingham-repository.worktribe.com/output/3542125
• Related Public URLs: https://waset.org/mechanical-analysis-and-testing-conference-in-november-2020-in-london