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temperature dependant material characteristics

Creator
Creator
Hi,

in a material file, I have defined Young's Modulus as temperature dependent so that I (wish I) could use it for different solutions (SOL101 or SOL106).



What is the best option to specify the temperature of my solution? (for exemple I need Young's modulus value @ 150°C)
I have tried to edit solution parameters: I put 150°C in "Initial Temperature Default (TEMPD)" but in the .dat file the Young's Modulus at 20°C is used (this is the TREF in the material description).

Is the edition of the material data (change the TREF) a good solution? :confused:
It works allright but his solution seems risky to me (you have to change material data, which are not related to your solution).

Should I create an initial temperature simulation object? It doesn't seem to have an effect on Young's Modulus.


exemple:
the info in material definition:
°C MPa
-200 216000
-125 212000
-75 209000
25 202000
100 198000
150 195000
200 192000
250 189000
300 185000
350 179000
400 171000
450 162000
500 151000
550 137000

in the .dat, after using "TEMPD 200150.0000" in solution controls:
MAT1 12.0235+8 0.300000 7750.00 20.0000
MATT1 1 1
TABLEM1 1 +
+ -200.0002.1600+8-125.0002.1200+8 -75.0002.0900+8 25.00002.0200+8+
+ 100.00001.9800+8150.00001.9500+8200.00001.9200+8250.00001.8900+8+
+ 300.00001.8500+8350.00001.7900+8400.00001.7100+8450.00001.6200+8+
+ 500.00001.5100+8550.00001.3700+8 ENDT

in the .dat, after using TREF 150°C:
MAT1 21.9500+8 0.300000 7750.00 150.0000
MATT1 2 1
TABLEM1 1 +
+ -200.0002.1600+8-125.0002.1200+8 -75.0002.0900+8 25.00002.0200+8+
+ 100.00001.9800+8150.00001.9500+8200.00001.9200+8250.00001.8900+8+
+ 300.00001.8500+8350.00001.7900+8400.00001.7100+8450.00001.6200+8+
+ 500.00001.5100+8550.00001.3700+8 ENDT
Cyril SAINTIGNY
1 REPLY

Re: temperature dependant material characteristics

Creator
Creator
I will try to reactivate my post!

What is the best method to make a solve at a specific temperature?

Shall I enter the caracteristics (such as modulus of elasticity, stress-strain values) at the solve temperature and solve?

Or can I create a "complete" material definitions with temperature dependent caracteristics; in such case, where should I "change the temperature" for the solve?

yours sincerely,
Cyril SAINTIGNY