서지주요정보
잔류 응력을 고려한 사출성형에서의 후변형 해석 = Analysis of shrinkage and warpage of injection molding considering residual stress
서명 / 저자 잔류 응력을 고려한 사출성형에서의 후변형 해석 = Analysis of shrinkage and warpage of injection molding considering residual stress / 최두순.
저자명 최두순 ; Choi, Du-Soon
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009559

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 99076

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Injection molding is widely used in producing various plastic parts due to its high productivity, and the demand for injection molded products with high precision is increasing. The accurate prediction of shrinkage and warpage of injection molded parts is important to achieve successful mold design and product precision. In this study, the analysis of shrinkage and warpage of injection molded parts was carried out in consideration of the residual stresses during the packing and cooling stages of injection molding. In residual stress analysis, a rheologically simple thermoviscoelastic material model was assumed to consider the stress relaxation effect and describe the mechanical behavior according to the temperature change. The model considered the extra material that is added to fill the space created by shrinkage during the packing stage. The temperature and pressure fields were obtained from the results of a coupled analysis of the filling and post-filling stages. The deformation of injection molded parts after ejection induced by the residual stress and temperature change was analyzed using a linear elastic model. A three-dimensional finite element method was employed for the present numerical deformation analysis. In order to verify the numerical results obtained from the developed program, the simulation results were compared with the available experimental data in the literature. Each of the results of residual stress and the shrinkage was verified. In the case of residual stress, it was found that the simulation results predicted larger tensile residual stresses at the surface of parts compared to the experimental data. However, the predicted shrinkage was found to be accurate and described the effects of processing conditions well. Thus it was concluded that the currently developed program can be useful in predicting the shrinkage and warpage for the design of injection molded parts. Finally, an analysis of the shrinkage and warpage was carried out for a part with a curved shape to examine the robustness of the developed program.

서지기타정보

서지기타정보
청구기호 {MME 99076
형태사항 iii, 82 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Du-Soon Choi
지도교수의 한글표기 : 임용택
지도교수의 영문표기 : Yong-Taek Im
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 37-40
주제 사출성형
잔류 응력
수축
뒤틀림
Injection molding
Residual stress
Shrinkage
Warpage
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