Energy absorption of shape memory structures

This project was conducted to observe the ability of a Nickel-Titanium (Nitinol) Shape Memory Alloy to absorb energy. The samples are in the shape of a circular thin wall tube and qausistatic lateral cyclic compression tests were carried out in a series of loading and unloading test. Force exerted o...

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Main Author: Koh, Justin Yue Siang
Other Authors: Liu Yong
Format: Final Year Project
Language:English
Published: 2013
Subjects:
Online Access:http://hdl.handle.net/10356/53972
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-539722023-03-04T18:15:32Z Energy absorption of shape memory structures Koh, Justin Yue Siang Liu Yong School of Mechanical and Aerospace Engineering Lu Guoxing DRNTU::Engineering This project was conducted to observe the ability of a Nickel-Titanium (Nitinol) Shape Memory Alloy to absorb energy. The samples are in the shape of a circular thin wall tube and qausistatic lateral cyclic compression tests were carried out in a series of loading and unloading test. Force exerted on the specimen was slowly increased per cycle till failure occurred. The specimen was also tested in various honeycomb structures to determine its energy absorption properties as a unit. From the Force Vs Displacement loops plotted, energy absorbed can be obtained from the area inside these loops. The resultant energy values amounted were compared which shows that specimens placed in the honeycomb square arrangement displayed the best energy absorbing properties. Apart from qausistatic testing, the specimen was compressed at various speeds to compare any relationship between energy absorption property and speed of loading. The results showed little reduction in energy absorbing properties at higher speeds. Finally, dynamic testing by the means of a Split-Hopkinson Pressure Bar Test was conducted. The author was unable to achieve a Stress vs Strain Curve for the dynamic test due to the lack of a transmission pulse. Bachelor of Engineering (Mechanical Engineering) 2013-06-10T08:39:50Z 2013-06-10T08:39:50Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/53972 en Nanyang Technological University 53 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Koh, Justin Yue Siang
Energy absorption of shape memory structures
description This project was conducted to observe the ability of a Nickel-Titanium (Nitinol) Shape Memory Alloy to absorb energy. The samples are in the shape of a circular thin wall tube and qausistatic lateral cyclic compression tests were carried out in a series of loading and unloading test. Force exerted on the specimen was slowly increased per cycle till failure occurred. The specimen was also tested in various honeycomb structures to determine its energy absorption properties as a unit. From the Force Vs Displacement loops plotted, energy absorbed can be obtained from the area inside these loops. The resultant energy values amounted were compared which shows that specimens placed in the honeycomb square arrangement displayed the best energy absorbing properties. Apart from qausistatic testing, the specimen was compressed at various speeds to compare any relationship between energy absorption property and speed of loading. The results showed little reduction in energy absorbing properties at higher speeds. Finally, dynamic testing by the means of a Split-Hopkinson Pressure Bar Test was conducted. The author was unable to achieve a Stress vs Strain Curve for the dynamic test due to the lack of a transmission pulse.
author2 Liu Yong
author_facet Liu Yong
Koh, Justin Yue Siang
format Final Year Project
author Koh, Justin Yue Siang
author_sort Koh, Justin Yue Siang
title Energy absorption of shape memory structures
title_short Energy absorption of shape memory structures
title_full Energy absorption of shape memory structures
title_fullStr Energy absorption of shape memory structures
title_full_unstemmed Energy absorption of shape memory structures
title_sort energy absorption of shape memory structures
publishDate 2013
url http://hdl.handle.net/10356/53972
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