Elastodynamic-reciprocity-based analysis of guided wave motion due to finite-length through-thickness tensile and shear cracks in plates

Brennan Dubuc; Stylianos Livadiotis; Arvin Ebrahimkhanlou; Salvatore Salamone

doi:10.1117/12.2557320

22 April 2020 Elastodynamic-reciprocity-based analysis of guided wave motion due to finite-length through-thickness tensile and shear cracks in plates

Brennan Dubuc, Stylianos Livadiotis, Arvin Ebrahimkhanlou, Salvatore Salamone

Author Affiliations +

Proceedings Volume 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV; 113800L (2020) https://doi.org/10.1117/12.2557320
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

This paper presents solutions for guided wave motion (Lamb and shear horizontal) due to tensile and shear cracks in an isotropic plate using elastodynamic reciprocity. Finite-length through-thickness cracks are considered via Huygens’ principle by representing them as a superposition of point cracks. Far-field solutions are then derived in order to simplify the results and facilitate a direct comparison of guided mode excitability due to various cracking modes. Relatively short- and long-length line cracking are compared to point cracking for the fundamental modes S₀, A₀, and SH₀. It is shown that the A₀ modal response is the most sensitive to crack length, with S₀ and SH₀ being relatively insensitive. Additionally, the radiation patterns of S₀, A₀, and SH₀ are relatively insensitive to crack length. The results have applications in acoustic emission monitoring of plate-like structures, where modal responses may be used to characterize crack growth.

Citation Download Citation

Brennan Dubuc, Stylianos Livadiotis, Arvin Ebrahimkhanlou, and Salvatore Salamone "Elastodynamic-reciprocity-based analysis of guided wave motion due to finite-length through-thickness tensile and shear cracks in plates", Proc. SPIE 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV, 113800L (22 April 2020); https://doi.org/10.1117/12.2557320

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