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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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 |
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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. |
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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 |
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Energy absorption of shape memory structures |
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Energy absorption of shape memory structures |
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energy absorption of shape memory structures |
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2013 |
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http://hdl.handle.net/10356/53972 |
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1759856268449677312 |