Ti-3ALv2.5 - stress strain TABLES1 for MATS1 material definition (20 deg C)

[Aerodesign]

I am working on a landing gear design/stress which is using T1-3ALv2.5 tubing. Linear static analysis indicates higher than yield stresses in various places. I have refined the model to enable believable stresses to be recovered (FE is mixed 1d, 2d and 3d elements) and now need to define the Ti material using MATS1 and a corresponding TABLES1 entry.

Does anybody have a traceable MATS1 NASTRAN bulk data card for this grade of Ti?

The structure will be welded, post weld heat treatment will be accounted for by factoring baseline results.

Regards
JW

 

[WKTaylor]

Aerodesign...

" ...working on a landing gear design/stress which is using T1-3ALv2.5 tubing...'.

WHAT is the Ti-3AL-2.5V tubing specification your parts are MF...?
AMS4945?
AMS4946?
AMS4944?
AMS4941?
AMS4942?

CAUTION
As I understand it, Ti-3AL-2.5V tubing is exclusively used for high pressure hydraulic system use... annealed and strain-cold-worked... and usually after being proof-pressure-tested and/or autofrettaged. The advantage of this tubing is the ability to be formed to tight radii for tube-routing. Use of this tubing in a 'mechanical/structural sense'... is a highly non-standard application.

I have used 21-6-9 CRES thick-wall tubing 'straight sections', for certain mechanical/structural applications... but not without significant reservations [angst!].

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]

 

[Aerodesign]

ASTM Grade 9

 

[WKTaylor]

Aerodesign... OKayyyy...

'ASTM-what' grade 9... ???

Please be specific... just-so-that-we-know-that-you-know... Examples of what I mean are...

ASTM B338 Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers
[Grade 1 thru Grade 39]
1.1.5 Grade 9—UNS R56320. Titanium alloy (3% aluminum, 2.5% vanadium)

ASTM F2146 Standard Specification for Wrought Titanium-3Aluminum-2.5Vanadium Alloy Seamless Tubing for Surgical Implant Applications (UNS R56320)
[NO GRADE 9 LISTED]

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]