Calculation of the Pull-Out Force of Ni₄₇Ti₄₄Nb₉ Shape Memory Ally Pipe Coupling

Abstract:

Investigation of mechanical state of shape memory alloy pipe-coupling had an important significance in engineering field. Theory of plastic deformation was used to analyze the coupling force in the tube connecting process of NiTiNb shape memory alloy, in this paper. Based on the analyzed results a mechanical modeling and formula calculation were carried out, the radial pressure of the SMA tube was calculated, in this paper. The results show that, when the temperature doesn’t reach to contact temperature, the pipe coupling of TiNiNb shape memory alloy has no radial pressure; when the temperature reaches to inverse martensite phase transformation temperature, the radial pressure increases; with the decreasing of temperature, the radial pressure increases a little. The radial pressure and push-out force increase with the increasing of the wall thickness. Thus, to improve the strength of connection, the wall thickness of pipe coupling can be properly increased.

• Periodical: Applied Mechanics and Materials (Volume 697)
• Pages: 360-364
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.697.360
• Online since: November 2014
• Authors: Jian Bang Zhou*, Ke Lu Wang, Qiang Chen, Guang Yuan Wang
• Keywords: Calculation Model, NiTiNb Shape Memory Alloy, Piple-Coupling, Pull-Out Force

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