Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.1656
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Title: The measurement of the Young's modulus of ice with ultrasonic waves
Language: English
Authors: Randhawa, Kulbir Singh 
Keywords: ice;polycrystalline;ultrasonic;sound velocity;mechanical properties;Young’s modulus;crack
Issue Date: 2018
Examination Date: Jan-2018
Abstract (english): Many techniques have been used to measure the Young’s modulus of ice. The purpose of this bachelor thesis is to develop a more effective and precise technique. The impulse-echo method has been used to measure the longitudinal ultrasonic velocities of three different types of specimens. From this, the Young’s modulus has been calculated. The specimens included homogeneous, inhomogeneous and a cracked polycrystalline ice Ih sample. The homogenous samples studied were found to be elastic isotropic, whereas the inhomogeneous and cracked sample were found to have an anisotropic elastic behaviour. For the cracked specimen, different decreases of the Young’s moduli were measured in different directions. The results showed an overall scatter and gives therefore only temporary and rough values for the longitudinal sound velocity in a homogenous polycrystalline ice specimen. Further, the applied method is applicable to detect different types of ice with different composites and manufacturing, and to identify a change of elastic properties after crack.
URI: http://tubdok.tub.tuhh.de/handle/11420/1659
DOI: 10.15480/882.1656
Institute: Konstruktion und Festigkeit von Schiffen M-10 
Type: Bachelor Thesis
Advisor: Ehlers, Sören 
Referee: Bock und Polach, Rüdiger Ulrich Franz von 
License: In Copyright In Copyright
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