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Appl. Sci. 2018, 8(5), 808; https://doi.org/10.3390/app8050808

Non-Contact and Real-Time Measurement of Kolsky Bar with Temporal Speckle Interferometry

1
Key Laboratory of Luminescence and Optical Information of Ministry of Education, Beijing Jiao tong University, Beijing 100044, China
2
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
*
Author to whom correspondence should be addressed.
Received: 17 April 2018 / Revised: 27 April 2018 / Accepted: 15 May 2018 / Published: 17 May 2018
(This article belongs to the Special Issue Precision Dimensional Measurements)
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Abstract

In this paper, a new non-contact and real-time measurement system for Kolsky bars is presented. This system uses two sets of temporal speckle interferometry in-plane displacement measurement devices to replace two strain gauges of conventional Kolsky bars. The in-plane displacement measurement of the Kolsky bar is mainly intended to provide a new test method for the dynamic mechanical properties of small-size material samples with diameters below 2 mm. This method is non-contact, does not require any intermediate medium, and can make the Kolsky bar applicable to characterizing the dynamic mechanical properties of materials under higher strain rates and smaller size conditions. The measuring devices and principles are described. In addition, a preliminary experiment is carried out to demonstrate the performance of this new device. View Full-Text
Keywords: Kolsky bar; speckle; in-plane displacement measurement; wavelet transform; dynamic mechanical properties Kolsky bar; speckle; in-plane displacement measurement; wavelet transform; dynamic mechanical properties
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Yang, S.; Gao, Z.; Ruan, H.; Gao, C.; Wang, X.; Sun, X.; Wen, X. Non-Contact and Real-Time Measurement of Kolsky Bar with Temporal Speckle Interferometry. Appl. Sci. 2018, 8, 808.

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