Hello Dear Friends,
I want to ask a question about results of rubber tests. I have some results for uniaxial tension test. And .txt file includes displacement,force,time and ext.1 values. Firstly,
- I can calculate engineering stress because I have initial conditions. But how can I calculate true stress and strain values? Can you help me about this issue?
- In test results, what is mean that ext.1.
Thank you so much for your answers