Characterization of thermal damage in graphene mortar materials using High-order sideband generation of Amplitude-modulation Vibro-acoustic technique. (15th June 2023)

• Record Type: Journal Article
• Authors: Yin, Tingyuan; Ng, Ching Tai; Vidler, James; Ho, Van Dac; Kotousov, Andrei
• Is Part Of: Mechanical systems and signal processing. Volume 193(2023)
• Publication Date: 2023-06-15
• Subjects: Vibro-acoustic modulation -- Amplitude-modulation -- Higher-order effect -- Nonlinearity -- Pristine graphene -- Mortar -- Cement-based material -- High-temperature -- NDT -- SHM; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2023.110259
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: Establishing a theoretical model that describes the interaction of three frequency components of AMVA technique. Defining β based on higher-order sidebands to characterize PRG mortar with various levels of thermal damages. The solution of u 2 is limited to describing sideband generation of three frequency waves. β considering higher-order sidebands is sensitive to micro-scale structural changes compared to E d . Abstract: In this paper, an amplitude-modulated vibro-acoustic (AMVA) technique using a transmitted amplitude-modulated pump wave to achieve lower power consumption and versatility is proposed to characterize different thermal damage levels of pristine graphene mortar specimens with various dosages. In previous studies, only the primary field u 1 and secondary field u 2 were considered in the theoretical model. Hence, some higher-order sidebands were not included even though they are frequently presented in experimental results and useful for damage detection purposes. Therefore, a theoretical model containing higher-order effects is established to include those higher-order sidebands. A nonlinear parameter β is defined based on this theoretical model, and experimental results demonstrated that β is feasible and sensitive to characterize thermal damages as well as distinguish various dosages of cement-based materials when compared to the results of the conventional resonant frequency technique. Therefore, AMVA technique has great potential to be a reliable and efficient technique for evaluating microstructural changes in cement-based materials.