Design of an actively actuated prosthetic socket

  • Crawford R
  • Montgomery J
  • Vaughan M
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Purpose – A prosthetic socket worn by an amputee must serve a wide variety of functions, from stationary support to the transfer of forces necessary to move. Because a subject's residual limb changes volume throughout the day, it is desirable that the socket adapt to accommodate volume changes to maintain fit and comfort. The purpose of this paper is to provide steps towards designing a transtibial nylon prothestic socket, fabricated by selective laser sintering (SLS), that automatically adapts to volumetric changes of a residual limb.Design/methodology/approach – An adaptive socket design that has both rigid and compliant regions is proposed to be manufactured by SLS and actuated by inflation. To assess the feasibility of this approach, thin membrane test specimens of various thicknesses and materials were created to understand the relationship between inflation pressure and deflection for SLS manufactured plastics. Finite element analysis (FEA) was assessed as a predictive design tool and verified with ...

Author-supplied keywords

  • Lasers
  • Limbs
  • Manufacturing systems
  • Prosthetic devices
  • Sintering

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  • Richard H. Crawford

  • John T. Montgomery

  • Meagan R. Vaughan

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