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Constitutive Modeling of Superelastic Shape Memory Alloys Considering Rate Dependent Non-Mises Tension-torsion Behavior

Taheri Andani, Masood
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1371577037

Abstract Details

2013, Master of Science in Mechanical Engineering, University of Toledo, Mechanical Engineering.
Shape memory alloys (SMAs) are a type of smart materials which have unique features known as superelasticity and shape memory effects. The origin of SMA characteristics is a reversible martensitic phase transformation between austenitic phase and martensitic phase. The interest in the mechanical behavior of SMAs is rapidly growing with the increasing number of potential industrial and medical applications. Accurate and practical mathematical models are essential in order to successfully design SMA devices. Within this work is the presentation of a general 3D model capable of capturing the multiaxial behavior of superelastic shape memory alloys (SMAs) under quasi-static isothermal or dynamic loading conditions. A semi-analytical framework is developed to numerically implement the model. An extended experimental study is conducted on NiTi thin walled tubes to investigate the performance of the model. The proposed approach is shown to be able to capture the non-Mises thermomechanical response of NiTi under complex tension-torsion loading conditions. The effect of loading sequence and loading rate is also experimentaly studied. The main motivation of the present study is to develop a platform for analyzing and designing biomedical devices with SMA actuator under combined tension-torsion loading conditions. The torsional stiffness of NiTi is shown to be adjustable by applying an extra axial load. This will lead to developing desirable torque response in NiTi tubes and rods by varying the axial load. A possible application of this technique in the form of an assistive device is discussed.
Mohammad Elahinia (Committee Chair)
Eftratios Nikolaidis (Committee Member)
Douglas Oliver (Committee Member)
102 p.
Mechanical Engineering
Shape Memory Alloys (SMAs); Superelastic; Heattransfer in SMAs; Coupled behavior; Transformation surface

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Citations

  • Taheri Andani, M. (2013). Constitutive Modeling of Superelastic Shape Memory Alloys Considering Rate Dependent Non-Mises Tension-torsion Behavior [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1371577037

    APA Style (7th edition)

  • Taheri Andani, Masood. Constitutive Modeling of Superelastic Shape Memory Alloys Considering Rate Dependent Non-Mises Tension-torsion Behavior. 2013. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1371577037.

    MLA Style (8th edition)

  • Taheri Andani, Masood. "Constitutive Modeling of Superelastic Shape Memory Alloys Considering Rate Dependent Non-Mises Tension-torsion Behavior." Master's thesis, University of Toledo, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1371577037

    Chicago Manual of Style (17th edition)

toledo1371577037
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This open access ETD is published by University of Toledo and OhioLINK.