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Crankshaft Failure Mode Analysis |
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| Dec21-10, 06:45 PM | #1 |
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Crankshaft Failure Mode Analysis
I have a broken crankshaft where I am trying to determine the cause of failure.
here are some pics of the cracked surface.   what is known: 1) the crank shaft was under very light load at time of failure What do you guys think? |
| Dec22-10, 01:55 PM | #2 |
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Fatigue. Crack propogation originating from the oil drilling shown.
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| Dec22-10, 02:07 PM | #3 |
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Thanks for the reply, could you explain how you are able to tell this?
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| Dec22-10, 02:12 PM | #4 |
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Crankshaft Failure Mode Analysis
1) Beach marks clearly visible showing nucleation site is likely somewhere around the fracture face on the drilling.
2) 90% of the time they fail like that. |
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