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Submitted on: 15 September 2013.
Revised on: 28 November 2013.
Accepted on: 01 January 2014.
___________________International Journal of Applied Mechanics
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Submitted on: 01 June 2017.
Revised on: 29 June 2017.
Accepted on: 12 August 2017.
___________________International Journal of Applied Mechanics
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