Design studies of a square ring shaped force sensor - Integrated ...
Design studies of a square ring shaped force sensor - Integrated ...
Design studies of a square ring shaped force sensor - Integrated ...
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INTERNATIONAL JOURNAL OF APPLIED ENGINEERING RESEARCH, DINDIGUL<br />
Volume 1, No 4, 2011<br />
© Copyright 2010 All rights reserved <strong>Integrated</strong> Publishing Association<br />
RESEARCH ARTICLE ISSN 09764259<br />
Figure 4: Deflection Pattern <strong>of</strong> a Quarter <strong>of</strong> Square Ring<br />
It has been found that the stress and strain are about 1/4 th <strong>of</strong> the stress – strain for the <strong>ring</strong><br />
<strong>shaped</strong> <strong>force</strong> <strong>sensor</strong>s <strong>of</strong> similar capacities. Beside it, the deflection is about half <strong>of</strong> the<br />
deflection for similar <strong>ring</strong> <strong>shaped</strong> <strong>force</strong> <strong>sensor</strong> [9].<br />
The analytical expressions may be suggested as follow for the <strong>square</strong> <strong>ring</strong> <strong>shaped</strong> <strong>force</strong><br />
<strong>sensor</strong>.<br />
3<br />
0.075PR<br />
d =<br />
EI<br />
(12)<br />
1.5M<br />
s =<br />
2<br />
bt<br />
(13)<br />
1.5M<br />
e =<br />
2<br />
Ebt<br />
(14)<br />
5. Conclusions<br />
The finite element analysis <strong>of</strong> the <strong>square</strong> <strong>ring</strong> <strong>shaped</strong> <strong>force</strong> <strong>sensor</strong> reveals information about<br />
stress / strain distribution and axial deflection pattern <strong>of</strong> <strong>force</strong> <strong>sensor</strong> under action <strong>of</strong> axial<br />
<strong>force</strong>s. The finite element analysis has been used for obtaining vital informations related to<br />
stress – strain and has been used here to modify the analytical expressions available for stress<br />
– strain and deflection for a <strong>square</strong> <strong>ring</strong> <strong>shaped</strong> <strong>force</strong> <strong>sensor</strong>. Further, the stress / strain<br />
732
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