Young's modulus - change with temp variations?

Question

Young's modulus - change with temp variations?

JourneymanEng (Mechanical)

(OP)

19 Jun 03 12:24

I am trying to conduct a simple FEA on a Stainless component that will experience temperatures in excess of 650 degrees C.

Problem:
I would like to change the material properties of the Steel i am using to establish the maximum deflection under load.

While my FEA package (ALGOR) will allow for temperature input, i find that achieving a uniform temperature in the model creates a large unworkable mesh.

I am innexperienced with Algor, but have used material property changes with other packages to good effect.

Is there a reference for changes in E or G for Stainless 316/321/304? The usual sources reveal nowt.

Peter

ajose (Structural) · Answer 1 · 2003-06-30 11:46:20

Hi,

Yes there is a change on the properties of the materials under temperature variations.

For your temperature the value of Modulus of elasticity is about 60% of the original.

The behavior is not linear

For the allowable stresses there is a change too, and for 650C is about 25% of the original

For more onformation try to get a book of materials engineer

JourneymanEng (Mechanical) · Answer 2 · 2003-07-01 04:55:52

Thanks for that ajose.

It would be good to have a look at a curve - do you have a good reference with a graph of the non linear properties?

Strangely the majority of books i have sourced on Steel properties do not provide much on teh changes in Young's Modulus.

JM

ajose (Structural) · Answer 3 · 2003-07-01 08:20:34

I'm far from my place (references) so i perform a search on www.altavista.com, key words "young modulus temperature"
I found:

+ There some interesting programs
              If you are gonig to use frecuently this could be an answerr

+ There is some forum in here called:
>------------>Ansys, young,s modulus in function of the temperature
Where you can find some data

>------------>Help¡¡¡¡ young,s modulus in function of the temperature
Where gunnarhole wrote:
The TEMA Handbook include a table (D-10) which lists Young's Modulus for a variety of material over a wide range of temperatures.  For example for plain C-Mn steels:

T, F    E, lbf/in^2
100    29,000,000
200    28.5
300    28
400    27.4
500    27
600    26.4
700    25.3
800    23.9
900    22.2
1000    20.1

Try the best for your job.

Theanalyst (Automotive) · Answer 4 · 2003-09-05 13:29:16

Hello, in relation to the change in the Young's modulus, would the posson's ratio also change with temperature??? Thanks.

musikus (Mechanical) · Answer 5 · 2003-10-01 08:41:24

I'm looking for a Sigma/Epsilon-Diagram (Tension) for steel and how it varies on different temperatures.
I need it for an FE-analysis in ABAQUS

Where can I get this?

eureka (Structural) · Answer 6 · 2003-10-23 09:48:56

JourneymanEng, if you will post a fax number, I will fax to you a copy of a table with the properties of E for stainless steel from -425 F to 1500 F.

musikus (Mechanical) · Answer 7 · 2003-10-24 05:08:37

my fax number for sending the requested information is +43/7748 6586 26

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Young's modulus - change with temp variations?