material data base "Error"

hi engineers,

We are using material A928 UNS S31803 CL.1 in caeserII for stress analysis but material input data base not having the A928 UNS S31803 CL.1 material .Now we are using A790 UNS s31803 Cl-1 instead of A928 UNS S31803 CL.1, but the CAESAR II shows some error, which is the allowable temperature of the material is out of range. And also we had been try to load the material properties from the ASME B31.3, then again it shows the same error.

plz advise us to do the stress analysis with these materials.

by
vijayabaskaran

Hi Vijay,

CAESAR material database have material properties upto a certain temperature. As soon as your material temperature is out of the range of material database you got an error.

FIX: You have to find the properties of the material from material engineer or googling. Then open the material editor in CAESAR & input manually the values of expansion & other properties for the temperature you want. Save it & you will not get any error message. Further, if any material is not in the database you can add the material in the database.

Cheers!

Abhishek

We had the same problem with Duplex and Titanium on a project that we just finished using CAESAR 5.00.

Our problem was not the upper temperature limit, but the lower. For these materials, the CAESAR data base did not have expansion coefficients below 70 deg. F. (21.1111 def. C.) This may be your problem too.

We solved this by creating our own material data bases to cover the range of temperatures that we needed. Unfortunately, this information is not readily available. We used educated guessing and extrapolation to get the numbers.

Good luck.

Until I read your last paragraph, I was about to ask where you found the date below 70 (actually 77) for Duplex. I haven't been able to find this.