Failure analysis of the fracture surface of the crankshaft of a vehicle

8th Annual International Conference 2018 on Science and Engineering

工业技术（总论）

Putra, T.E.^1 ; Husaini^1 ; Ali, N.^1 ; Husin, H.^2 ; Zulfikar^1

Department of Mechanical Engineering, Faculty of Engineering, Syiah Kuala University, Darussalam, Banda Aceh

23111, Indonesia^1

Department of Chemical Engineering, Faculty of Engineering, Syiah Kuala University, Darussalam, Banda Aceh

23111, Indonesia^2

关键词: Chemical compositions;    Fatigue failures;    Fracture surfaces;    Gasoline engines;    Hardness values;    Initial cracks;    Material hardness;    Visual examination;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/523/1/012067/pdf
DOI  :  10.1088/1757-899X/523/1/012067

学科分类：工业工程学

来源: IOP

【 摘 要 】

The purpose of this study was to determine the cause of a fracture in the crankshaft of a 1000 cc gasoline engine. On the broken surface, it could be seen that the cracks started from the direction of the oil hole. A visual examination revealed that there were beach marks on the surface of the fracture, which is usually common in fatigue failure due to a dynamic load. From the test for the chemical composition, it was found that the material was classified as alloy steel. The Rockwell-based material hardness values were different. The highest hardness value of 102.2 HRB was on the outer shell portion of the crankshaft on the x and y axes at points 1 and 14. Finally, it was concluded that the reason for the fracture in the crankshaft was fatigue failure, the material hardness that did not match that of the standard, as well as the initial crack contained within the radius of crank pin number 1.