Investigation of failure mechanism of a DCI engine connecting rod

Gök, Mustafa Güven; Cihan, Ömer

doi:10.36222/ejt.957287

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…It was concluded that the main cause of the connecting rod damage was the high stress levels in the vicinity of the bolt holes, provoked by the very high tightening force of the bolts [8]. Researchers in [9], investigated the failure of the connecting rod of a 1.5 dci K9K diesel engine. As a result of the engine operating for approximately 378400 km, the connecting rod was broken, and the reasons for the failure of the connecting rod cap and connecting bolt were investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect on Fatigue Behavior of Connecting Rod in Gasoline Engine

Ketmuang,

Wongthong

2024

Eng. Technol. Appl. Sci. Res.

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This article reports the failure analysis of a connecting rod that is broken into 3 pieces and is used in the gasoline engine of a sedan. The connecting rod is made of JIS-S50C medium alloyed steel. Fractography was performed to characterize the failure mode on the fracture surface of this connecting rod through the examination of the macroscopic and microscopic morphologies of the fracture surface, chemical composition, metallographic analysis, mechanical properties of the material, and numerical simulation. The fracture surface of this connecting rod is caused by fatigue, which was the dominant mechanism of failure. This type of crack is indicative of shear failure in the ductile fracture mode, whereas no abnormalities were found in the composite elements of the connecting rod. The microstructure is composed of perlite-ferrite. The results of the numerical simulation and the calculated crushing stress (sc) were compared and were found to be in accordance and within the acceptable values.

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Section: Introductionmentioning

confidence: 99%

Effect on Fatigue Behavior of Connecting Rod in Gasoline Engine

Ketmuang,

Wongthong

2024

Eng. Technol. Appl. Sci. Res.

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Failure Analysis of Cast Iron Housing Unit of Ucf-216 Ball Bearing Used in a Fully Automatic Concrete Building Block Machine

Gök,

Şahin

2024

International Advanced Researches and Engineering Journal

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One of the most common problems faced by briquette machine users in the industry is the failure of the cast iron housing unit of the UCF-216 bearings, to which the main shaft of the briquette machine is attached. In this study, the failure mechanism of a cast iron housing unit of a UCF-216 bearing broken during operation in a briquette machine was analysed in order to develop a solution to the problem. Failure was occurring in the bolt hole areas of the housing unit. First of all, spectral analysis was performed and it was determined that the housing unit was grey cast iron. Then, the macrostructures of both unused and damaged housing units were examined. Some casting defects were detected in the bolt hole areas of the unused housing unit. It was also learned that during the assembly of the UCF-216 to the briquette machine, no torque meter was used while the bolts were tightened. In order to understand the effect of possible overtightening of the bolts, the system was modelled as a 3D solid. This model was exported to the finite element software and different bolt pretensions were applied considering the stresses created by the bolt tightening forces on the housing unit. As a result, it was understood that if the ratio of the stress caused by the axial bolt tightening force in the UCF-216 bearing unit to the yield stress of the UCF-216 housing unit is above 50%, fatigue failure will occur.

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Investigation of failure mechanism of a DCI engine connecting rod

Cited by 2 publications

References 26 publications

Effect on Fatigue Behavior of Connecting Rod in Gasoline Engine

Effect on Fatigue Behavior of Connecting Rod in Gasoline Engine

Failure Analysis of Cast Iron Housing Unit of Ucf-216 Ball Bearing Used in a Fully Automatic Concrete Building Block Machine

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