Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A Study on Geometric Optimization of a 500 ml Lightweight Square PET Bottle with CAE Analysis

CAE 해석을 통한 500 ml 경량 사각 PET병의 형상 최적화

  • Eui-Chul Jeong (Digital Manufacturing Division, Korea Institute of Industrial Technology) ;
  • Sung-Hee Lee (Digital Manufacturing Division, Korea Institute of Industrial Technology) ;
  • Hyunn-Seung Lee (Digital Manufacturing Division, Korea Institute of Industrial Technology) ;
  • Jung-Gil Oh (Dong-A Prec. Co. Ltd) ;
  • Seok-Kwan Hong (Digital Manufacturing Division, Korea Institute of Industrial Technology)
  • 정의철 (한국생산기술연구원 금형성형연구부문) ;
  • 이성희 (한국생산기술연구원 금형성형연구부문) ;
  • 이현승 (한국생산기술연구원 금형성형연구부문) ;
  • 오정길 ((주)동아정밀공업연구소) ;
  • 홍석관 (한국생산기술연구원 금형성형연구부문)
  • Received : 2024.06.15
  • Accepted : 2024.06.30
  • Published : 2024.06.30
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Abstract

Lightweight of plastic containers is becoming an important issue due to increasing environmental legislation and consumer awareness. In this study, the CAE analysis was conducted to optimize the shape of a 500 ml lightweight square polyethylene terephthalate(PET) bottle. First, the linear buckling alaysis using the finite element method was performed to analyze the correlation between the primary geometric parameters of the bottle and the buckling critical load. Then, the optimal geometry parameters were derived, and the actual buckling load was predicted by non-linear buckling simulation. The validity of the simulation results was verified by top-loading tests of PET bottles molded with the optimized geometry. The elastic modulus and tensile yield strength of PET through tensile tests were measured to improve the accuracy of the simulation. As a result of the tensile tests, the modulus of elasticity of PET increased from 2,900 MPa to 4,275 MPa, and the tensile yield strength increased from 52.4 MPa to 88.1 MPa. Finally the buckling load of the optimized PET bottle was found to be approximately 236 N, which is very similar to the simulation precition of 238 N. This study shows the feasibility and accuracy of the CAE analysis approach for the lightweight design of PET bottles, and will provide useful guidelines for the design of PET bottles.

Keywords

Acknowledgement

본 연구는 2024년도 산업통상자원부 우수기업연구소육성사업(ATC+) 연구비 지원에 의해 수행되었습니다(20018030).

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