Technical Help: Questions About TABLEST Card Configuration in Thermo-Elasto-Plastic Analysis

YunMiao_1997

Hello everyone,

I’m currently working on a thermo-elasto-plastic analysis and have run into two questions regarding the creation and configuration of the TABLEST card. I would really appreciate it if colleagues with relevant experience could help clarify these doubts.

Question 1: Do I need to add a TEMPD=25 card for the room-temperature fastening case?

When accounting for thermo-elasto-plasticity, I need to create a TABLEST card. My analysis involves two main loading cases:

1. The first case is fastening at room temperature (25°C);
2. The second case is high-temperature analysis after the fastening process.

To ensure that the analysis can correctly reference the 25°C TABLES1 curve in the TABLEST card during the first case, do I need to include a TEMPD=25 card in the room-temperature fastening case?

Question 2: Why is a temperature-dependent yield strength curve not required for defining ?

I noticed that when setting up the thermo-elasto-plastic analysis, we typically need to reference a temperature-dependent elastic modulus curve in MATT1. However, it seems unnecessary to include a temperature-dependent yield strength curve. Could someone explain the reason behind this?

Thank you in advance for your help and insights!

Sriramanuj_16

Hi @YunMiao_1997 ,

Please find my answer to Question 1:
Yes, it’s good practice to include a TEMPD=25 card for the room-temperature fastening case.

• Without it, the solver assumes 0 C as the reference temperature by default.
• If your fastening process is explicitly at 25 C, defining TEMPD=25  ensures that the correct material data (from the 25 C curve in the TABLEST) is used consistently.