SRC Forum - Message Replies
Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and Answers
Topic Posted by: Reliability & Maintainability Forum
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Posted by: RS Moore
Date posted: Thu Sep 9 11:24:09 US/Eastern 1999
Subject: Life assessment for thermally shocked product
My company has recently undertaken thermal shocking of a small (0.6" x 0.6") hybrid-like device. This involved 450 thermal cycles from -50C to +90C in 60 seconds with 30 minute temperature dwells at each extreme. The product was unpowered.
Am I able to determine an estimate for the product's life based on the testing described above and if so how do I go about it?
Subject: Product Life Assesment
Reply Posted by: Dave White
Organization: Spectral Solutions, Inc.
Date Posted: Wed Sep 15 12:08:48 US/Eastern 1999
I'm afraid that you will need more information before you can make an estimate of product life. What are the failure modes of the product? Did the testing you described help to accelerate any failures? Were the failures noted with respect to when they occured? Are there any other failure modes not effected by this test? What is the actual environment that the product will be exposed to?
As a start I would recomend reading Wayne Nelsons book on Accelerated Testing. It has a lot of useful information.