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Characterization of constrained aged niti strips for using in artificial muscle actuators

Hassanzadeh Nemati, N ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.5829/idosi.ije.2011.24.04a.01
  3. Abstract:
  4. Marvelous bending/straightening effects of two-way shape memory alloy (TWSMA) help their employment in design and manufacturing of new medical appliances. Constrained ageing with bending load scheme can induce two-way shape memory effect (TWSME). Scanning electron microscopic (SEM) analysis, electrical resistivity measurement (ERM) and differential scanning calorimetry (DSC) are employed to determine the property change due to flat strip constrained aging. Results show that flat-annealing prior to the aging shifts NiTi transformations temperatures to higher values. Superelastic behavior of the as-received/flat- annealed/aged samples with more adequate transition temperatures due to biological tissue replacement is studied by three-point flexural tests. Results show that curing changes the transition points of the NiTi strips. These changes affect the shape memory behavior of the NiTi strips embedded within the biocompatible flexible composite segments
  5. Keywords:
  6. Annealing ; Artificial muscles ; Constrained ageing ; TWSME ; Biomedical equipment ; Differential scanning calorimetry ; Electric conductivity ; Shape memory effect ; Artificial muscle ; Artificial muscle actuator ; Bending load ; Biological tissues ; Constrained ageing ; Electrical resistivity measurements ; Flat strips ; Flexible composites ; Flexural tests ; Medical appliance ; Property changes ; Scanning electron microscopic ; Shape memory behavior ; Super elastic behavior ; Transition point ; Two-way shape memory alloys ; Two-way shape memory effect ; Muscle
  7. Source: International Journal of Engineering, Transactions A: Basics ; Volume 24, Issue 4 , 2011 , Pages 321-329 ; 17281431 (ISSN)
  8. URL: http://www.ije.ir/abstract/%7BVolume:24-Transactions:A-Number:4%7D/=1157