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MMPDS Room Temperature

MMPDS Room Temperature

MMPDS Room Temperature

(OP)
Anyone know, or have better eyes than I do, as to whether the MMPDS uses a standard value for room temperature?
- I can't find it defined anywhere in the opening chapters,
- nor is it defined per material,
- nor does it appear to be ISA value of 15°C (eg. Figure 3.2.4.0(a) showing temperature depended data for Al2024 seems to indicate a transition point at 90°F / 32°C, but doesn't specify it explicitly, while Figure 3.2.4.1.1(a) seems to indicate 80°F / 27°C).

It seems like a stupid question, but I can't for the life of me find a definition anywhere...
Would definitely appreciate anyone's insights.

RE: MMPDS Room Temperature

AAE... MMPDS Chapter 9 is very important and nerdy-technical. See Table 9.2.3 "Summary of Required Testing..."

Testing for all material values [mechanical, environmental, etc] is accomplished [mostly] per ASTM methods. I am dead certain... without looking... that ASTM has the definitions You are looking for.

NOTE. Values between 60-to-80F... which most of us in the US would use as 'typical RT rule-of-thumb'... are typically uniform/flat... with insignificant variations in metals for at least another +/-30F. probably more differences in the test equipment set-up and calibrations [for variations due to expansion/contraction/calibration of mechanical and electronic gages].

Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

RE: MMPDS Room Temperature

Excellent question. Section 9.8.5.1 is the only place I could find that specifies a temp - 80F.

Doug

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