Browse > Article
http://dx.doi.org/10.5762/KAIS.2020.21.7.191

Failure Analysis by Fracture Study of Connecting Rod Bolts in Diesel Engine for Military Tracked Vehicles  

Oh, Dae San (Defense Agency for Technology and Quality)
Kim, Ji Hoon (Defense Agency for Technology and Quality)
Seo, Suk Ho (Defense Agency for Technology and Quality)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.7, 2020 , pp. 191-200 More about this Journal
Abstract
Tracked military vehicles are operated under harsher conditions and climates than ordinary vehicles, and the components require high degrees of reliability and durability. A diesel engine is the main power generator, and when the vehicle breaks down, there is a high possibility of causing a large-scale accident. Therefore, analyzing the cause of engine failure can be important for preventing similar cases that may occur. In this study, we clarified the mechanism of engine failure according to an overhaul test, hardness measurement, and an analysis of the fracture surface. The overhaul test confirmed that a bolt was separated from the connecting rod (number 4). In addition, the hardness measurement results of the connecting rod bolt conformed to the standard, and it was found that the bolt fracture was ductile fracture through an analysis of the fracture surface. Based on the results, it was concluded that damage to a diesel engine of a tracked military vehicle was caused by separating and damage caused by loosening of the connecting rod bolts, resulting in cascading damage. The results of the study could be used as reference examples and could be useful for another study on engine failure analysis.
Keywords
Diesel Engine; Damage; Fracture; Failure Analysis; Connecting Rod; Bolt;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 G. H. Jung, S. G. Sin, C. H. Park, and D. S. Oh, "Military Engine Process Improvement for Visualization and Increasing Discrimination of Oil Leak", Proceeding of 2019 Spring Season Korean Society Of Automotive Engineers, The Korean Society Of Automotive Engineers, Jeju, Korea, pp. 1349, May 2019.
2 J. H. Yun, I. G. Jeong, C. S. Yi, J. S. Suh, and T. E. Lee, "A Numerical Analysis on the Flow Characteristics of Cooling Fan in the Generator a Auxiliary Power Unit for Tracked Vehicle", Proceeding of 2011 Spring Season Korean Society Of Automotive Engineers, The Korean Society Of Automotive Engineers, Jeju, Korea, pp. 304-308, May 2011.
3 D. S. Oh, G. H. Jung, S. H. Seo, and C. H. Park, "Military Engine Quality Securing Plan between Engine Performance Test according to Applying Fluorescent Dye", Proceeding of 2019 Fall Season Korea Society for Quality Management, The Korea Society for Quility Management, Incheon, Korea, pp. 2018, September, 2019.
4 S. H. Seo, J. H. Kim, and D. S. Oh, "Process Improvement of Land System Engine for Visualization and Increasing Identification of Engine Oil Leakage", Journal of the Korea Academia-Industrial Cooperation Society, Vol. 21, No. 3, pp. 321-327, Mar. 2020. DOI: http://doi.org/10.5762/KAIS2020.21.3.321   DOI
5 H. M. Beak, H. M. Kim, T. W. Kang, Y. H. Heo, K. I. Son, and K. R. Kim, "Failure Analysis of the First Article Endurance Tests of 1,500 HP Transmission", Journal of Defense Quality Society , Vol. 1, No. 2, pp. 68-85, Jun. 2019.
6 F. S. Silva, "Fatigue on Engine Pistons - A Compendium of Case Studies", Engineering Failure Analysis, Vol. 13, No. 23, pp. 480-492, March, 2005. DOI: https://doi.org/10.1016/j.engfailanal.2004.12.023   DOI
7 A. Vencl, A. Rac, "Diesel Engine Crankshaft Journal Bearings Failures: Case Study", Engineering Failure Analysis, Vol. 22, No. 5, pp. 217-228, May, 2014. DOI: http://dx.doi.org/10.1016/j.engfailanal.2014.05.014   DOI
8 N. D. S. A. Santos, V. R. Roso, and M. T. C. Faria, "Review of Engine Journal Bearing Tribology in Start-stop Applications", Engineering Failure Analysis, Vol. 108, No. 104344, pp. 1-16, November, 2019. DOI: https://doi.org/10.1016/j.engfailanal.2019.104344
9 Defense Acquisition Program Administration, "Defense Acquisition Quality Control Provision", pp. 22-24, Defense Acquisition Program Administration, 2019.
10 E. Greuter and S. Zima, "Engine Failure Analysis: Internal Combustion Engine Failures and Their Causes", p. 1-185, SAE International, 2012.
11 Deutsches Institute for Normung e. V., DIN 73021, "Designation of the Rotational Direction, the Cylinders and the Ignition Circuits of Motorcar Engines", June, 1953.
12 J. L. A. Ferreira, A. B. S. Oliveira, A. B. Souza, V. G. Carloni, and D. A. Leite, "Structural Integrity Analysis of the Main Bearing Cap Screws of the Turbo-diesel Engine Crank Shaft", Engineering Failure Analysis, Vol. 12, No. 3, pp. 273-286, November, 2004. DOI: https://doi.org/10.1016/j.engfailanal.2004.03.011
13 H. Somekawa, K. Nakajima, A. Singh, and T. Mukai, "Ductile Fracture Mechanism in Fine-grained Magnesium Alloy", Engineering Failure Analysis , Vol. 90, No. 11, pp. 831-839, February, 2010. DOI: https://doi.org/10.1080/09500839.2010.508444
14 G. A. Zade and D. D. Gadekar, "Accelerated Simulation of Engine Wet Cylinder Liner Cavitation Test Procedure", Symposium on International Automotive Technology, The Automotive Research Association of India, Pune, India, pp. 313-319. May, 2007.
15 O. P. Singh, Y. Umbarkar, T. Sreenivasulu, E. Vetrivendan, M. Kannan, and Y. R. Babu, "Piston Seizure Investigation: Experiments, Modeling and Future Challenges", Engineering Failure Analysis, Vol. 28, No. 5, pp. 302-310, November, 2012. DOI: http://dx.doi.org/10.1016/j.engfailanal.2012.11.005
16 O. Asi, "Fatigue Failure of a Helical Gear in a Gearbox", Engineering Failure Analysis , Vol. 13, No. 7, pp. 1116-1125, September, 2005. DOI: https://doi.org/10.1016/j.engfailanal.2005.07.020   DOI
17 J. B. Marcomini, C. A. R. P. Baptista, J. P. Pascon, R. L. Teixeira, and F. P. Reis, "Investigation of a Fatigue Failure in a Stainless Steel Femoral Plate", Journal of the Mechanical Behavior of Biomedical Materials, Vol. 38, No. 11, pp. 52-58, July, 2014. DOI: http://dx.doi.org/10.1016/j.jmbbm.2014.06.011   DOI
18 K. Srinivasan, O. Kolednik, and T. Siegmund, "A Micromechanics-based Model for Micro-toughness Estimation from Dimple Geometry Measurements", Engineering Fracture Mechanics, Vol. 74, No. 7, pp. 1323-1343, September, 2006. DOI: https://doi.org/10.1016/j.engfracmech.2006.07.004