PSI - Issue 2_A

Goran Vukelic et al. / Procedia Structural Integrity 2 (2016) 2944–2950 Author name / Structural Integrity Procedia 00 (2016) 000 – 000

2950

7

propagated towards the opposite edge of the surface under the influence of cycling loading. Radiating ridges on the fracture surface show the path of crack advancement. Obtained results can be used in understanding the fracture behavior of coil spring in motor vehicle suspension system and further improvement of spring performance in order to reduce failures. Further analysis would include employing finite element method to determine stress levels in undamaged and damaged coil spring along with numerical estimation of fatigue life.

Acknowledgements

This work has been financially supported by University of Rijeka under the project 13.07.2.2.04.

References

Angelova, D., Yordanova, R., Lazarova, T., Yankova, S., 2014. On Fatigue Behavior of Two Spring Steels. Part I: Wöhler Curves and Fractured Surfaces. Procedia Materials Science 3, 1453-1458. Ardehali Barani, A., Ponge, D., Raabe, D., 2006. Refinement of grain boundary carbides in a Si – Cr spring steel by thermomechanical treatment. Materials Science and Engineering: A 426(1 – 2), 194-201. Boyer, H.E., Gall, T.L., 1985. Metals handbook. Desk edition. American Society for Materials, Materials Park, OH, USA. Das, S.K., Mukhopadhyay, N.K., Ravi Kumar, B., Bhattacharya, D.K., 2007. Failure analysis of a passenger car coil spring. Engineering Failure Analysis 14(1), 158-163. Fragoudakis, R., Karditsas, S., Savaidis, G., Michailidis, N., 2014. The Effect of Heat and Surface Treatment on the Fatigue Behaviour of 56SiCr7 Spring Steel. Procedia Engineering 74, 309-312. Harada, Y., Tanaka, S., Itoh, M., Nakatani, M., 2014. Effect of Microshot Peening on Fatigue Life of Spring Steel SUP9. Procedia Engineering 81, 1493-1498. Li, W., Sakai, T., Wakita, M., Mimura, S., 2014. Influence of microstructure and surface defect on very high cycle fatigue properties of clean spring steel. International Journal of Fatigue 60, 48-56. Kosec, L., Nagode, A., Kosec, G., Kovačević, D., Karpe, B., Zorc, B., Kosec, B., 2015. Failure analysis of a motor -car coil spring. Case Studies in Engineering Failure Analysis 4, 100-103. Murtaza, G., Akid, R., 2000. Empirical corrosion fatigue life prediction models of a high strength steel. Engineering Fracture Mechanics 67(5), 461-474. Nam, W.J., Lee, C.S., Ban, D.Y., 2000. Effects of alloy additions and tempering temperature on the sag resistance of Si – Cr spring steel. Materials Science and Engineering: A 289(1 – 2), 8-17. Prawoto, Y., Ikeda, M., Manville, S.K., Nishikawa, A., 2008. Design and failure modes of automotive suspension springs. Engineering Failure Analysis 15(8), 1155-1174. Zhu, Y., Wang, Y., Huang, Y., 2014. Failure analysis of a helical compression spring for a heavy vehicle's suspension system. Case Studies in Engineering Failure Analysis 2(2), 169-173.