응력수명법을 이용한 탄소섬유강화복합재 로어 컨트롤 아암의 내구성 평가

• Received : 2017.07.05
• Accepted : 2017.08.23
• Published : 2017.11.01
• 18 5

Abstract

Recently, regulations on fuel efficiency and $CO_2$ emissions have been reinforced in automobile industries. As a result, many companies make an effort to satisfy these regulations by adapting composite materials to the automobile body as well as its components. In particular, the lower control arm in the suspension system is subjected to heavy loads and is designed to be thick to meet operating loads. Therefore, it is essential for the lower control arm to reduce weight and to secure the durability assessment. In this paper, we conducted structural analysis by performing stress and stiffness analysis under given load conditions through finite element analysis, and verified whether it satisfies the load and stiffness conditions. The inertia relief method is adapted to the process of analysis, and the principal stress is used as a criterion for evaluation. Based on these results, the durability assessment is carried out using the stress-life method.

Keywords

Lower Control Arm;Structure Analysis;Durability Assessment;Composite Material;Finite Element Analysis;Stress-Life Method

References

1. Jacob, A., 2010, "BMW Counts on Carbon Fiber for its Megacity Vehicle," Reinforced plastics, pp. 38-41.
2. Lee, D. H. and Park, Y. C., 2003, "Multi-objective Optimization of Lower Control Arm Considering the Stability for Weight Reduction," The Korean Society of Automotive Engineers, Vol. 11, No. 4, pp. 94-101.
3. Jung, Y. S., Na, J. H., Min, S. J. and Kim, Y. S., 2013, "Multi-Performance Structural Optimization of a Lower Control Arm for Weight Reduction," Proceeding of the Korean Society of Automotive Engineers, No. 5, pp. 1290-1292.
4. Bannantine, J. A., Comer, J. J. and Handrock, J. L., 1989, "Fundamentals of Metal Fatigue Analysis," Prentice Hall, Upper Saddle River, NJ.
5. Park, J. H., Son, K. R. and Park, I. H., 2014, "Improvement of Durability for Aluminum Control Arm by Fatigue Analysis under Vehicle Load Condition," Proceeding of the Korean Society of Automotive Engineers, No. 5, pp. 427-432.
6. Kong, K., Park, Y. B., Park, H. W., Keum, J. W., Jeong, H. S. and Jung, Y. B., 2011, "Design Optimization of the Lower Arm using the Carbon Fiber Reinforced Polymer(CFRP)," Proceeding of the Korean Society of Automotive Engineers, pp. 23-37.
7. Park, H. S. and Choi, J. H., Koo, J. M. and Seok, C. S., 2010, "Fatigue Damage Evaluation of Woven Carbon-Fiber-Reinforced Composite Materials by Using Fatigue Damage Model," Trans. Korean Soc. Mech. Eng. A, Vol. 34, No. 6, pp. 757-762. https://doi.org/10.3795/KSME-A.2010.34.6.757
8. Mao, H. and Mahadevan, S., 2002, "Fatigue Damage Modelling of Composite Materials," Composite Structures, Vol. 58, pp. 405-410. https://doi.org/10.1016/S0263-8223(02)00126-5
9. Abdelal, G. F., Cacers, A. and Barbero, E. J., 2002, "A Micro-Mechanics Damage Approach for Fatigue of Composite Materials," Composite Structures, Vol. 56, pp. 413-422. https://doi.org/10.1016/S0263-8223(02)00026-0
10. Lim, J., Doh, J., Yoo, S. H., Kang, O., Kang, K. and Lee, J., 2016, "Sizing Optimization of CFRP Lower Control Arm Considering Strength and Stiffness Conditions," Korean Journal of Computational Design and Engineering, Vol. 21, No. 4, pp. 389-396. https://doi.org/10.7315/CDE.2016.389
11. Khan, S. U., Munir, A., Hussian, R. and Kim, J. K., 2010, "Fatigue Damage Behaviors of Carbon Fiber- Reinforced Epoxy Composites Contacting Nanoclay," Composite Science and Technology, Vol. 70, No. 14, pp. 2077-2085. https://doi.org/10.1016/j.compscitech.2010.08.004
12. Mori, T. and Tanaka, T., 1973, "Average Stress in the Matrix and Average Elastic Energy of Materials with Misfitting Inclusions," Acta Metallurgica, Vol. 21, No. 5, pp. 571-574. https://doi.org/10.1016/0001-6160(73)90064-3
13. HyperMesh User Guide, HyperMesh Version 11.0, Altair Engineering Inc., Troy, MI, 2012.
14. Nithin, K. and Veeresha, R., 2013, "Analysis of Front Suspension Lower Control Arm of an Automobile Vehicle," International Journal of Science and Research, Vol. 2, pp. 51-56.
15. Heo, S. J., Kang, D. O., Lee, J. H., Lee, I. H. and Darwish, S. M. H., 2013, "Shape Optimization of Lower Control Arm Considering Multi-disciplinary Constraint Condition by Using Progress Meta-model Method," International Journal of Automotive Technology, Vol. 14, No. 3, pp. 499-505. https://doi.org/10.1007/s12239-013-0054-7
16. Bessert, N. and Fredrich, O., 2005, "Nonlinear Airship Aeroelasticity," Journal of Fluids and Structures, Vol. 21, No. 8, pp. 731-742. https://doi.org/10.1016/j.jfluidstructs.2005.09.005
17. Reifsnider, K. L., Henneke, E.G., Stinchcomb, W. W. and Duke, J. C., 1983, "Damage Mechanics and NDE of Composite Laminates," Mechanics of Composite Materials: Recent advances, pp. 399-420.
18. Kim, J. K., Park, Y. C., Kim, Y. J. and Lee, K. H., 2009, "Structural Optimization of a Control Arm with Consideration of Durability Criteria," Trans. Korean Soc. Mech. Eng. A, Vol. 33, No. 11, pp. 1225-1232. https://doi.org/10.3795/KSME-A.2009.33.11.1225
19. Park, H. S., Kim, J. K., Seo, . M. K., Lee, H. and Park, Y. C., 2009, "Structural Design of a Front Lower Control Arm considering Durability," Journal of The Korean society of Manufacturing Process Engineers, Vol. 8, No. 4, pp. 69-75.
20. Jen, M. and Lee, C., 1998, "Strength and Life in Thermoplastic Composite Laminates under Static and Fatigue Loads. Part I : Experimental," Int. J. Fatigue, Vol. 20, No. 9, pp. 605-615. https://doi.org/10.1016/S0142-1123(98)00029-2

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP), 한국연구재단