Influence of Cracking Groove Parameter of Crankshaft Bearing Block on Crack Tip Stressstrain Field

YANG Dan; KOU Shuqing

doi:10.3969/j.issn.10012222.2017.04.005

Vehicle Engine >

2017 , Vol. 0 >Issue 4: 22 - 25

DOI: https://doi.org/10.3969/j.issn.10012222.2017.04.005

Influence of Cracking Groove Parameter of Crankshaft Bearing Block on Crack Tip Stressstrain Field

YANG Dan ,
KOU Shuqing

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(1. College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China;2. Roll Forging Research Institute, Jilin University, Changchun 130022, China)

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Abstract

The core of fracture splitting process was building the gap artificially. The stress concentration formed in the gap and then the initial crack generated, extended and finally ended with the fracture splitting. Taking a car crankshaft bearing block as research object, the stressstrain field of crack tip before fracturing was analyzed under different gap parameters with Abaqus software based on the criterion of cleavage fracture normal stress. The results showed that the gap was insensitive because QT500 cylinder block behaved brittle at normal temperature. Considering the problems of crack nucleation, extending, splitting groove machining and splitting load,the optimum parameters of cracking groove were determined. The experiment proved that the optimized parameters had a good effect of fracturing.

Key words： crankshaft; bearing block; fracture splitting; process parameter

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YANG Dan , KOU Shuqing . Influence of Cracking Groove Parameter of Crankshaft Bearing Block on Crack Tip Stressstrain Field[J]. Vehicle Engine, 2017 , 0(4) : 22 -25 . DOI: 10.3969/j.issn.10012222.2017.04.005

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