Vibration Induced Fatigue Assessment in Vehicle Development Process

Improvement in CAE methods has an important role for shortening of the vehicle product development time. It is provided that validation of the design and improvements in terms of durability can be done without hardware prototype production. In recent years, several different methods have been developed in order to investigate fatigue damage of the vehicle. The intended goal among these methods is prediction of fatigue damage in a short time with reduced costs. This study developed a new fatigue damage prediction method in the automotive sector using power spectrum densities of accelerations. This study also confirmed that the weak region in vehicle can be easily detected with the method developed in this study which results were compared with conventional method.

• Fatih Kagnici

• Fatigue damage
• Power spectrum density
• Vibration induced fatigue
• Vehicle development

[1] Wannenburg, J., A Study of Fatigue Loading on Automotive and Transport Structures, Doctorate Thesis in Mechanical Engineering, University of Pretoria, Pretoria, August 2007.
[2] Fischer, P., Witteveen, W., Schabasser, M., "Integrated MBS-FE-Durability Analysis of Truck Frame Components by Modal Stress", ADAMS User Meeting, Rom, 2000
[3] Kim, H. S., Yim, H. J., Kim, C. B., "Computational Durability Prediction of Body Structures in Prototype Vehicles", International Journal of Automotive Technology, Vol. 3, 2002, pp.129-135.
[4] A. Halfpenny, "A Frequency Domain Approach for Fatigue Life Estimation from Finite Element Analysis", International Conference on Damage Assesment of Structures, Dublin, 1999.
[5] Bishop NWM, Hu Z, Wang R, Quarton D., "Methods for Rapid Evaluation of Fatigue Damage on the Howden HWP300 Wind Turbine", British Wind Energy Conference, York, 1993.
[6] Qiang R., Hongyan W., "Frequency Domain Fatigue Assessment of
Vehicle Component under Random Load Spectrum", J. Phys.: Conf.
Ser. vol. 305, no. 012060, 2011.
[7] Dirlik T., Application of Computers in Fatigue Analysis, PhD Thesis,
University of Warwick, UK, 1985.
[8] Bishop, N. W. M., Lack, L. W., Li, T., Kerr, S. C., "Analytical Fatigue
Life Assessment of Vibration Induced Fatigue Damage", MSC 1995
World Users' Conf. Proc., Paper No. 18, May, 1995.
[9] Wang X., Xhao G., Tang C., "Analysis of Frequency Response and
Fatigue of Car Body by Random Loading", 3rd IEEE International
Conference on Computer Science and Information Technology,
Chengdu, China, July 9-11, 2010.