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A Study on Design Factor of Insole using Shape Memory Alloy for Pes Planus Correction

평발교정용 형상기억합금 초탄성 인솔 설계 연구

  • Yang, Mi Kyung (Department of Mechanical Engineering, Soonchunhyang University) ;
  • Lee, Sang-Wook (Department of Mechanical Engineering, Soonchunhyang University)
  • 양미경 (순천향대학교 기계공학과) ;
  • 이상욱 (순천향대학교 기계공학과)
  • Received : 2017.02.08
  • Accepted : 2017.05.12
  • Published : 2017.05.31

Abstract

As the number of patients suffering from Pes Planus increases, research on a correctional insole that can cope with them is increasingly required. Therefore, the design of an insole for Pes Planus Correction was studied using the superelastic effect, which is one of the characteristics of the shape memory alloy in this paper. To design an effective insole, the effect of the contact pressure induced by the insole on the plantar fascia, which is the most important muscle in the foot structure, was evaluated. Three parameters (thickness, max. height and asymmetric ratio) were set as the main design factors of the insole, and the maximum contact pressure appearing on the plantar fascia was calculated by finite element analysis and analyzed using the Taguchi method. As a result of the analysis, it was confirmed that the contact pressure was influenced in the order of max. height, thickness, and asymmetric ratio. In addition, the contact pressure was converted to a feeling pressure that could be felt by a person, and then a safety correction range was established that would not cause any irritation to the plantar fascias, even though the correction effect could be expected. This indicates the best design for the safety correction range. The design method considering the important factors established through this study can form the basis for designing a personalized correctional insole in the future.

Keywords

Shape Memory Alloy;Superelasticity;Pes Planus;Insole;Finite Element Analysis

Acknowledgement

Supported by : 순천향대학교

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