High torsion stiffness leafspring flexure element using distributed warping constraints

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Leafsprings are commonly used in flexure mechanisms to enable repeatable motion and provide support stiffness. In various applications, the torsional stiffness needs to be increased. This paper presents the concept of using warping constraints distributed along the leafspring to increase the torsional stiffness relative to the stiffness in other directions. A beam-based model of nonuniform torsion is used to estimate the relationship between the geometrical design parameters and the expected increase in torsional stiffness. The model predicts that an order of magnitude increase in stiffness is feasible. Compared to other solutions, the distributed warping constraints have a less obtrusive shape that offer more design freedom.

Original languageEnglish
Title of host publicationEuropean Society for Precision Engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022
EditorsRichard K. Leach, A. Akrofi-Ayesu, C. Nisbet, Dishi Phillips
Number of pages4
ISBN (Electronic)9781998999118
Publication statusPublished - 2022
Event22nd International Conference & Exhibition, EUSPEN 2022 - CERN, Geneva, Switzerland
Duration: 30 May 20223 Jun 2022
Conference number: 22


Conference22nd International Conference & Exhibition, EUSPEN 2022
Abbreviated titleEUSPEN
Internet address


  • constraints
  • Flexure mechanism
  • leaf spring
  • torsion stiffness
  • twisting
  • warping


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