Characterization of hydrogel structures using video-based vibration analysis

Matthew Sands; Logan Sapp; Jinki Kim

doi:10.1117/12.2613248

18 April 2022 Characterization of hydrogel structures using video-based vibration analysis

Matthew Sands, Logan Sapp, Jinki Kim

Proceedings Volume 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI; 120470U (2022) https://doi.org/10.1117/12.2613248
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

Investigating the mechanical properties of biological and biocompatible hydrogel materials has recently gained extensive research interest due to their potential applications in various fields including tissue engineering, biorobotics and sensors. However, estimating the essential structural characteristics such as elastic moduli of hydrogel structures may not be easily identified using conventional contact-based techniques such as accelerometers and strain gauges due to their additional mass loading to the structure and influence on the shape of the hydrogel structure by mechanical contact. Non-contact optical methods such as Laser-Doppler vibrometry may be able to identify the vibration characteristics; yet, the low reflectivity of translucent hydrogel’s surfaces is one of the major challenges in laser-based vibration analysis, and experimentally estimating the mode shape requires significant effort. In this study, we aim to investigate a contactless method to simultaneously identify the Young’s and shear moduli of hydrogel structures by employing video-based vibration analysis. Phase-based motion estimation and magnification are utilized to experimentally determine the resonance frequencies and operational deflection shapes and identify the Young’s and shear moduli of gelatinous hydrogel structures. The experimental results of this study provides promising potential of implementing the proposed approach for applications in areas including advanced manufacturing and soil characteristics identification.

Conference Presentation

Citation Download Citation

Matthew Sands, Logan Sapp, and Jinki Kim "Characterization of hydrogel structures using video-based vibration analysis", Proc. SPIE 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI, 120470U (18 April 2022); https://doi.org/10.1117/12.2613248

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