Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Finite Element Analysis of a Customized Eyeglass Frame Fabricated by 3D Printing

3 차원 프린팅으로 제작된 개인맞춤형 안경테의 유한요소해석

  • Lee, Ji-Eun (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Im, Young-Eun (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Park, Keun (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 이지은 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 임영은 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 박근 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2015.08.19
  • Accepted : 2015.11.16
  • Published : 2016.01.01
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Abstract

In recent years, 3D printing has received increasing attention due to releases of low-cost 3D printers based on open-source platform. 3D printing is expected to reduce the barrier to entry in the traditional manufacturing processes by increasing flexibility and creating an advantage to manufacture customized products at low costs. In this study, a unique eyeglass frame was designed to have a snake shape, which has an asymmetric geometry unlike traditional frames. The eyeglass frame was designed in a customized manner by reflecting dimensional characteristics of a customer's face. Finite element analysis was performed to investigate the structural safety of the 3D printed frames during the assembly process. The analysis also considered the effect of anisotropic material properties as determined by tensile tests. The eyeglass frame was then printed using the customized sizes and the best building process. The eyeglass frame was successfully assembled with lenses and without structural failure during its assembly procedure.

최근 개방형 소스 기반의 저가 3 차원 프린터의 출현에 의해 3 차원 프린팅에 대한 관심이 고조되고 있다. 3 차원 프린팅은 기존 제조업의 진입장벽을 낮추고 유연성을 높일 것으로 기대되며, 저비용으로 개인맞춤형 제품의 제작이 가능한 장점이 있다. 본 연구에서는 뱀 모양을 형상화한 비대칭 형상의 독특한 안경테를 설계하였고, 사용자의 안면 특성을 반영하여 개인맞춤형으로 설계하였다. 또한 3 차원 프린팅으로 제작된 안경테의 구조적 안전성을 평가하기 위해 유한요소해석을 수행하였으며, 이때 적층방향별 인장시험을 통해 확보한 직교이방성 물성을 반영하였다. 해석을 통해 가장 안전성이 높게 평가된 적층 방향으로 프린팅을 수행하였고, 제작된 안경테는 조립과정에서 파손 없이 조립됨을 확인하였다.

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