The actuator performance of high temperature shape memory alloys (HTSMAs) can be significantly influenced by viscoplastic mechanisms that appear in metals under high temperature conditions. In this work we investigate experimentally and theoretically the coexistence of phase transformation and viscoplastic behavior in HTSMAs. The experimental study shows that decrease in the thermal cycling rate causes decrease in the actuation strain, as additional irrecoverable strain is generated due to creep mechanisms. The interaction between viscoplasticity and transformation is studied further using TEM. In order to simulate the material response, we propose a constitutive model based on an existing shape memory alloy model, which aims to capture the simultaneous phase transformation and viscoplastic behavior of a HTSMA. After calibration, the proposed model is used in order to identify the impact of the loading rate in the material’s response.
Skip Nav Destination
ASME 2009 International Mechanical Engineering Congress and Exposition
November 13–19, 2009
Lake Buena Vista, Florida, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4385-7
PROCEEDINGS PAPER
Coexistense of Creep and Transformation in High Temperature Shape Memory Alloys
Dimitris C. Lagoudas,
Dimitris C. Lagoudas
Texas A&M University, College Station, TX
Search for other works by this author on:
George Chatzigeorgiou,
George Chatzigeorgiou
Texas A&M University, College Station, TX
Search for other works by this author on:
Darren J. Hartl,
Darren J. Hartl
Texas A&M University, College Station, TX
Search for other works by this author on:
Parikshith K. Kumar
Parikshith K. Kumar
Texas A&M University, College Station, TX
Search for other works by this author on:
Dimitris C. Lagoudas
Texas A&M University, College Station, TX
George Chatzigeorgiou
Texas A&M University, College Station, TX
Darren J. Hartl
Texas A&M University, College Station, TX
Parikshith K. Kumar
Texas A&M University, College Station, TX
Paper No:
IMECE2009-11718, pp. 45-51; 7 pages
Published Online:
July 8, 2010
Citation
Lagoudas, DC, Chatzigeorgiou, G, Hartl, DJ, & Kumar, PK. "Coexistense of Creep and Transformation in High Temperature Shape Memory Alloys." Proceedings of the ASME 2009 International Mechanical Engineering Congress and Exposition. Volume 12: Micro and Nano Systems, Parts A and B. Lake Buena Vista, Florida, USA. November 13–19, 2009. pp. 45-51. ASME. https://doi.org/10.1115/IMECE2009-11718
Download citation file:
12
Views
Related Proceedings Papers
Related Articles
Viscoplastic Deformation of 40 Pb/60Sn Solder Alloys—Experiments and Constitutive Modeling
J. Electron. Packag (December,2001)
Sliding Mode Control of Mechanical Systems Actuated by Shape Memory Alloy
J. Dyn. Sys., Meas., Control (January,2009)
Failure Analysis of Miniature Solder Specimen
J. Electron. Packag (March,2004)
Related Chapters
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Radiative Properties of High Temperature Particles in Their Phase Transitions and Inverse Radiation Problem of Particles
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Analysis of Components: Strain- and Deformation-Controlled Limits
Design & Analysis of ASME Boiler and Pressure Vessel Components in the Creep Range