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Twist–coil coupling fibres for high stroke tensile artificial muscles

Journal Article


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Abstract


  • A new concept for tensile artificial muscles is introduced in which the torsional actuation of a twisted polymer fibre drives a twist to writhe conversion in a serially attached elastomeric fibre. Thermally induced torsional rotation of the twisted fibre caused formation of coils in the elastomeric fibre which resulted in overall muscle length contraction. Theoretical predictions of the muscle strain were developed by means of a modified single-helix theory. Experimental tests were conducted to measure the isotonic contraction strains for elastomeric fibres of different diameters and lengths. A good agreement between the measured and calculated results was found. Practical applicability of this muscle is evaluated by using different mechanical loading conditions. Actuation contraction strains as high as 10% were observed with excellent reversibility. Unlike original coiled fibre tensile actuators, these twist-coil artificial muscles did not require any pre-conditioning cycles.

UOW Authors


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

Publication Date


  • 2018

Citation


  • Aziz, S., Naficy, S., Foroughi, J., Brown, H. R. & Spinks, G. M. (2018). Twist–coil coupling fibres for high stroke tensile artificial muscles. Sensors and Actuators A: Physical, 283 98-106.

Scopus Eid


  • 2-s2.0-85054048776

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4358&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3304

Number Of Pages


  • 8

Start Page


  • 98

End Page


  • 106

Volume


  • 283

Place Of Publication


  • Netherlands

Abstract


  • A new concept for tensile artificial muscles is introduced in which the torsional actuation of a twisted polymer fibre drives a twist to writhe conversion in a serially attached elastomeric fibre. Thermally induced torsional rotation of the twisted fibre caused formation of coils in the elastomeric fibre which resulted in overall muscle length contraction. Theoretical predictions of the muscle strain were developed by means of a modified single-helix theory. Experimental tests were conducted to measure the isotonic contraction strains for elastomeric fibres of different diameters and lengths. A good agreement between the measured and calculated results was found. Practical applicability of this muscle is evaluated by using different mechanical loading conditions. Actuation contraction strains as high as 10% were observed with excellent reversibility. Unlike original coiled fibre tensile actuators, these twist-coil artificial muscles did not require any pre-conditioning cycles.

UOW Authors


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

Publication Date


  • 2018

Citation


  • Aziz, S., Naficy, S., Foroughi, J., Brown, H. R. & Spinks, G. M. (2018). Twist–coil coupling fibres for high stroke tensile artificial muscles. Sensors and Actuators A: Physical, 283 98-106.

Scopus Eid


  • 2-s2.0-85054048776

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4358&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3304

Number Of Pages


  • 8

Start Page


  • 98

End Page


  • 106

Volume


  • 283

Place Of Publication


  • Netherlands