시뮬레이션을 통한 열성형에서의 필름 평균두께 계산
Calculation of Average Thickness of film in Thermoforming by Simulation
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In this study, numerical simulation of the thermoforming process of PVC film material was performed using PAM-Form. For this purpose, tensile tests were performed at various temperatures and the coefficients of the G’Sell model were obtained and used. As a result of the analysis, it was confirmed that the thickness decreased by up to 55% in the section where the film was in contact with the vertical direction and was greatly stretched. If the thickness is excessively thin, the part may become structurally weak, so in the thermoforming process, numerical simulation of the thickness in advance is expected to be helpful in successfully performing the process.
Abstract
In this study, numerical simulation of the thermoforming process of PVC film material was performed using PAM-Form. For this purpose, tensile tests were performed at various temperatures and the coefficients of the G’Sell model were obtained and used. As a result of the analysis, it was confirmed that the thickness decreased by up to 55% in the section where the film was in contact with the vertical direction and was greatly stretched. If the thickness is excessively thin, the part may become structurally weak, so in the thermoforming process, numerical simulation of the thickness in advance is expected to be helpful in successfully performing the process.
참고문헌 (5)
- 박두용, "열성형 공정에서 발생하는 필름의 잔류응력 및 스프링 백에 관한 연구", Design & Manufacturing, 16(1), pp.27~35 (2022), 한국금형공학회[DOI]
- Lee, C. H., "Thermoforming device development and process analysis", KSMTE Fall Meeting Proceedings, pp.117~117 (2018)
- G'Sell, C., "Yield and transient effects during the plastic deformation of solid polymers", J Mater Sci, 16, pp.1956~1974
- Seong, G. S., "A study on the thickness distribution and pattern deformation of films in vacuumassisted thermoforming", Design and Manufacturing, 12(2), pp.1151~1159 (2003)
- 박은민, "카본 패브릭을 이용한 프리폼 성형에 대한 수치모사", Composites Research, 33(2), pp.61~67 (2020), 한국복합재료학회[DOI]