Re: Off Topic - Reliability Engineering

From: <alwyn>
Date: Mon Apr 28 2003 - 12:41:00 EDT

fracture mechanics, .........engineers do have uses , this is one of them. TRy to find a good one

• Original Message ----- From: Steve McKenzie To: <a href="/group/PipingDesign/post?postID=91MXt1G0A5P_9XLF4tySEbKirzFvBvsv0dEMeXNJPnkADsiW7H-hwESOsBU25CqVpCJCtDp4aMTrWBjjVbPiv7c4sr0">PipingDesign@yahoogroups.com</a> Sent: Monday, April 28, 2003 5:43 AM Subject: [PipingDesign] Off Topic - Reliability Engineering

   Messieurs & Mesdames

   I have been asked a dumb (I think) question which it is in my better    interest to answer.
   The life of a hydrodynamic bearing.
   The bearing in question is some 40 years old (perhaps) and suffering    from some measurable substrate delamination (30%). Bearing material    is white metal or Babbit, diameter is 1.5m, width is 0.9m, load is    around 200T.
   Lube is 220 cSt temp forecast around 40 deg C. No signs of cracking    on the face.
   According to my research, life is likely to be veeeery long, unless a    crack develops which, if in the wrong spot, will destroy the bearing    in short order. How do I estimate the likelihood of a crack    developing? Perhaps you can tell me.
   I was hoping that someone might refer me to some    historical/statistical data which may put some gloss on an answer to    a (probably) silly question.

   Thanks

   Steve McKenzie

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[Non-text portions of this message have been removed] Received on Mon Apr 28 12:41:00 2003