U-shaped Bolts Fracture Failure Analysis. (2015)

• Record Type: Journal Article
• Authors: Kong, Huanping; Liu, Delin; Jiang, Tao
• Is Part Of: Procedia engineering. Volume 99(2015)
• Page Start: 1476
• Page End: 1481
• Publication Date: 2015
• Subjects: u-shaped bolt -- fatigue fracture -- micro cracks -- surface decarburization; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2014.12.688
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Left 1# u-shaped boltfractured when the automobile running 3766 km in testing process, then 2# u-shaped bolt was repacked. Left 2# u-shaped bolt and right 3# u-shaped bolt were fractured whenthe automobile running 7778 km. The failure mode and cause were analyzed by macro and micro observation, metallographic examination, hardness and tensile property testing, dimension examination.The results showed that u-shaped bolts were fatigue fracture. U-shaped bolts' failure was related with densely distributed surface micro cracks, surface decarburization appearance, small dimension, and low strength of material.