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방진고무 내구 해석의 정량적 평가를 위한 프로그램 개발
강유석(Yousuk Kang),심상철(Sangchul Sim),김학진(Hakjin Kim) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
The anti-vibration rubber of a vehicle is component that improves the performance of the vehicle by damping shocks or vibrations from the ground while improving the performance of the vehicle and enhancing the stability of the occupant. The durability life of such a vibration-proof rubber is measured by the single-use endurance test using the normal force and the horizontal force measured in the actual vehicle evaluation, and the life span of the vibration-proof rubber is measured. If this process is followed, the cost and time consuming to develop the anti-vibration rubber compared to the price of the anti-vibration rubber become very large due to the complicated process such as the single durability test, the improvement after the improvement, and the single durability test. Developed a program that can quantitatively evaluate the durability life of anti - vibration rubber through finite element analysis. The program was developed using the durability formula defined using the relationship between the tearing energy of rubber and dynamic crack growth. The predicted life expectancy using the developed program was compared with the endurance life value obtained from the actual test. As a result, it was confirmed that the reliability of the program was verified through comparison between the predicted value and the result of actual single item test using the anti-vibration rubber endurance prediction program. Using the developed program, it is expected to be useful for the design considering the durability life of the anti - vibration rubber.
심상철(Sangchul Sim),강유석(Yousuk Kang),김학진(Hakjin Kim) 한국자동차공학회 2017 한국자동차공학회 부문종합 학술대회 Vol.2017 No.5
Performance analysis and evaluation technique of weather strip components for automobiles was studied. Automotive weather strip is a very important component in determining the quality of emotion that reduce noise and the physical quality that blocks rainwater and pollutants. A rubber material, a foam material and the like are mixed and used in order to satisfy required performance such as door closing and permanent deformation. Rubber materials and foam materials have different nonlinear behaviors, which are different from metal materials. Therefore, there are many difficulties in convergence of analysis and there are many errors in mounting condition of vehicle. The material test was first performed to ensure the reliability of the analysis, and the analysis and evaluation were carried out through the mounting and testing of the product. Nonlinear finite element analysis was performed using commercial software ABAQUS, and various material models and analytical methods were selected and analyzed. As a result, it was analytically verified that the validity of the test results was over 80%. Through this, it is expected that reliable results can be used when designing the product.