Forum: Reliability & Maintainability Questions and Answers

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Posted by: Daniel Mahoney
Date posted: Tue Feb 15 16:38:00 US/Eastern 2000
Subject: Filament Reliability
Message:
Hi all,
Does anyone have any reliability data for filaments? Is there an equivalent 217 type I could use? Thanks in advance

Replies:
Filaments
Bruce Dudley Mon Feb 21 9:51:48 US/Eastern 2000

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Posted by: Xiangping,Wu (wuxiangping@huawei.com.cn )
Organization:HUAWEI TECH.LTD.
Date posted: Tue Feb 15 3:39:26 US/Eastern 2000
Subject: ASQC Reliability Engineer Certification
Message:
Does anyone can tell me what the ASQC Reliability Engineer Certification is? I'm a China reliability engineer. How can I get the ASQC? Any information will be welcome.Thanks.

Replies:
ASQ CRE
Patrick Hetherington Tue Feb 15 5:44:40 US/Eastern 2000

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Posted by: Bob Valerius (robert_m_valerius@md.northgrum.com )
Organization:Northrop-Grumman Oceanic & Naval Sys
Date posted: Mon Feb 14 15:15:24 US/Eastern 2000
Subject: Failure model for a metal bellows
Message:
Hi
I am trying to find a failure rate model similar to other mechanical models in the Carderock mechanical reliability handbook. I realize that NPRD-95 has a couple of data points for bellows but they are GF environment (ours is naval unsheltered) and the failure rate is given independent of number of cycles, material, etc. I would expect those parameters to play a large part in the failure of a bellows. Thanks for your time. Bob Valerius 410-260-5247 410-694-2387 fax

Replies:
Reliability Conversion
Bruce Dudley Thu Feb 17 15:02:34 US/Eastern 2000

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Posted by: Stev Myers (sdmyers&collins.rockwell.com )
Date posted: Sat Feb 12 22:25:16 US/Eastern 2000
Subject: Failure Rate Conversion
Message:
I have an MTBF figure for an LRU operating in A(IC) Airborne Inhabited Cargo enviroment of 6,000 hrs. I am going to operate it in the G(M) Ground Mobile enviroment. Does anyone know the conversion factor I use to translate A(IC) to G(M)?

Replies: (list all replies)
Failure Rate Conversion
Steve Myers Sun Feb 13 1:30:30 US/Eastern 2000
Reliability Conversion Factors
Jon K. Ilseng Tue Feb 15 17:55:11 US/Eastern 2000
installer
. Sat Apr 6 8:05:38 US/Eastern 2002

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Posted by: Clay Davis
Date posted: Fri Feb 11 19:08:45 US/Eastern 2000
Subject: Reliability of Fans
Message:
Does anyone know where I can find reliability data for DC Fan Motors. The fan is used inside a computer and its a 40x40x28mm with ball-bearing construction.
I referenced the NPRD data for a Fan, Axial, Tube but the failure rate for 46.8 to 1123.4 for ground benigh. I am esp interested in MTBF vs Temp and Fan Speed. Also, what are the failure modes (lock-up, electrical stress, etc) and % of occurence would be great. Thank you.

Replies:
Fan Reliability
Bruce Dudley Thu Feb 17 16:03:06 US/Eastern 2000

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