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Journal of Intelligent Material Systems and Structures
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Shape Memory Alloy in Tension and Compression and its Application as Clamping Force Actuator in a Bolted Joint: Part 2 — Modeling

Mehrdaad Ghorashi

Mechanical Engineering Department, Sharif University of Technology, P.O. Box 11365-9567 Tehran, Iran

Daniel J. Inman

Center for Intelligent Material Systems and Structures, Virginia Polytechnic Institute and State University, VA, USA, dinman{at}vt.edu

The mathematical modeling of a bolted joint with a Shape Memory Alloy (SMA) actuator ring is presented. In this way, phase transformation, constitutive and displacement compatibility equations are used. The obtained model is utilized to show how the application of the SMA actuator ring in the bolted joint can help the joint to recover a significant amount of its lost clamping force. The model is run using the experimental data obtained for the Ni-55.7%wt Ti SMA in the companion paper (Part 1). The mechanical properties of SMA are calculated using the mentioned equations and compared to the experimental findings. It is observed that the final clamping force obtained theoretically is close to the measured value. The proposed method can, therefore, be a starting point in order to perform the analysis and design of bolted joints with SMA actuator rings.

Key Words: mathematical modeling • shape memory alloy • phase transformation • bolted joints • self-healing structures

Journal of Intelligent Material Systems and Structures, Vol. 15, No. 8, 589-600 (2004)
DOI: 10.1177/1045389X04042791
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This article has been cited by other articles:


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 Journal of Intelligent Material Systems and StructuresHome page
C. Antonios, D. J. Inman, and A. Smaili
Experimental and Theoretical Behavior of Self-healing Bolted Joints
Journal of Intelligent Material Systems and Structures, June 1, 2006; 17(6): 499 - 509.
[Abstract] [PDF]

Home page
 Journal of Intelligent Material Systems and StructuresHome page
T. Hesse, M. Ghorashi, and D. J. Inman
Shape Memory Alloy in Tension and Compression and its Application as Clamping-Force Actuator in a Bolted Joint: Part 1 -- Experimentation
Journal of Intelligent Material Systems and Structures, August 1, 2004; 15(8): 577 - 587.
[Abstract] [PDF]