Journal of Institute of Convergence Technology (융복합기술연구소 논문집)

Institute of Convergence Technology (한국교통대학교 융복합기술연구소)
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Measurement of Tensile Relaxation of Leather for Shoe Uppers

구두 상부용 가죽의 인장 회복량 측정실험

  • Lee, Jeongmin (Graduate School of Automotive Engineering, Korea National University of Transportation) ;
  • Bae, Mincheol (Department of Energy System Engineering, Korea National University of Transportation) ;
  • Kim, Yungwoo (Department of Energy System Engineering, Korea National University of Transportation) ;
  • Choi, Seongmyung (Department of Energy System Engineering, Korea National University of Transportation) ;
  • Baek, Sungkwan (Department of Energy System Engineering, Korea National University of Transportation) ;
  • Lee, Hyoungwook (Department of Automotive Engineering, Korea National University of Transportation)
  • 이정민 (한국교통대학교 자동차공학과 대학원) ;
  • 배민철 (한국교통대학교 에너지시스템공학과) ;
  • 김영우 (한국교통대학교 에너지시스템공학과) ;
  • 최승명 (한국교통대학교 에너지시스템공학과) ;
  • 백성관 (한국교통대학교 에너지시스템공학과) ;
  • 이형욱 (한국교통대학교 자동차공학과)
  • Received : 2017.03.30
  • Accepted : 2017.05.17
  • Published : 2017.05.31
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Abstract

In general, the shoe stretcher is utilized to stretching the leather of shoe upper in the longitudinal direction. In the capstone design class, we tried to make a shoe leather stretcher for the ball of foot. Since a natural cow leather was recovered in length according to relaxation time after stretched, it was difficult to predict the initial amount of set up of stretching. In this paper, tensile and relaxation experiments were conducted in order to predict the amount of initial stretching for appropriate tensile length. Apparatus of leather stretching was designed and strains of leather were measured according to relaxation times of 12, 18, 24 hours after stretching of 24 hours. It was revealed that the ratio of the final relaxed strain and the initial applied strain was about 0.404 with R-square of 0.990 for a shoe cow leather.

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References

  1. Okasana K., Olena M., and Boguslaw W., "Deformation Characteristics of Leather for Shoe Upper, Filled with Natural Minerals" J. Chem. Chem. Eng.8, pp.47-53, 2014.
  2. http://sizekorea.kats.go.kr