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No rating yet Subject: Re: [Other] GKH modulus Author: Chris Masterson Date: 2008-05-06 21:38:14Wow! 30% is more than I had imagined. If you had said 5 or 10% I wouldn't have been too surprised, despite my earlier emails but 30% might as well be an entirely different material. I worked in the fatigue group at deHavilland in Toronto for a while and spot checking fatigue properties for materials was part of the testing we did so I was well aware of the large scatter in fatigue data. But 30% variation of the modulus....yeesh!
Regards, Chris Masterson Toyota Racing Development
"McGlaun, Monte" Sent by: xansys-bounces_at_xansys.org 05/06/2008 01:24 PM Please respond to ANSYS User Discussion List
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Subject Re: [Xansys] [XANSYS][Other] GKH modulus
Another observation related to scatter. Every material I have had tested to obtain stress strain data has had variations from test to test in Young's modulus. This occurred at different labs and with different materials. Up to 30% variation! So much for constants.
What this means for a critical, dynamically tuned structure is that it is possible to see big differences between our calculations and the performance of the production assembly. Or we may see differences from one assembly to the other if they are made from different material lots.
Monte A. McGlaun, Staff Engineer Bell Helicopter Textron, Inc., Fort Worth, TX
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