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Thermomechanical effects in the torsional actuation of twisted nylon 6 fiber

Journal Article


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Abstract


  • Thermally induced torsional and tensile actuators based on twisted polymeric fibers have opened new opportunities for the application of artificial muscles. These newly developed actuators show significant torsional deformations when subjected to temperature changes, and this torsional actuation is the defining mechanism for tensile actuation of twisted and coiled fibers. To date it has been found that these actuators require multiple heat/cool cycles (referred to as "training" cycles) prior to obtaining a fully reversible actuation response. Herein, the effect of annealing conditions applied to twisted nylon 6 monofilament is investigated and it is shown that annealing at 200°C eliminates the need for the training cycles. Furthermore, the effect of an applied external torque on the torsional actuation is also investigated and torsional creep is shown to be affected by the temperature and load.

UOW Authors


  •   Aziz, Shazed Md (external author)
  •   Naficy, Sina (external author)
  •   Foroughi, Javad (external author)
  •   Brown, Hugh (external author)
  •   Spinks, Geoff M.

Publication Date


  • 2017

Citation


  • Aziz, S., Naficy, S., Foroughi, J., Brown, H. R. & Spinks, G. M. (2017). Thermomechanical effects in the torsional actuation of twisted nylon 6 fiber. Journal of Applied Polymer Science, 134 (47), 45529-1-45529-7.

Scopus Eid


  • 2-s2.0-85026447256

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/3702/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2654

Start Page


  • 45529-1

End Page


  • 45529-7

Volume


  • 134

Issue


  • 47

Place Of Publication


  • United States

Abstract


  • Thermally induced torsional and tensile actuators based on twisted polymeric fibers have opened new opportunities for the application of artificial muscles. These newly developed actuators show significant torsional deformations when subjected to temperature changes, and this torsional actuation is the defining mechanism for tensile actuation of twisted and coiled fibers. To date it has been found that these actuators require multiple heat/cool cycles (referred to as "training" cycles) prior to obtaining a fully reversible actuation response. Herein, the effect of annealing conditions applied to twisted nylon 6 monofilament is investigated and it is shown that annealing at 200°C eliminates the need for the training cycles. Furthermore, the effect of an applied external torque on the torsional actuation is also investigated and torsional creep is shown to be affected by the temperature and load.

UOW Authors


  •   Aziz, Shazed Md (external author)
  •   Naficy, Sina (external author)
  •   Foroughi, Javad (external author)
  •   Brown, Hugh (external author)
  •   Spinks, Geoff M.

Publication Date


  • 2017

Citation


  • Aziz, S., Naficy, S., Foroughi, J., Brown, H. R. & Spinks, G. M. (2017). Thermomechanical effects in the torsional actuation of twisted nylon 6 fiber. Journal of Applied Polymer Science, 134 (47), 45529-1-45529-7.

Scopus Eid


  • 2-s2.0-85026447256

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/3702/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2654

Start Page


  • 45529-1

End Page


  • 45529-7

Volume


  • 134

Issue


  • 47

Place Of Publication


  • United States