Sorry, actual diameter as in the actual diameter of the specimen that I measured before starting the mechanical testing on the Instron. We take images of the specimen then use image j to work out the original diameter later on. Then this value is taken as the actual value whereas the program has...
Thanks again Studiot. It's not possible for me to calculate the area at the maximum load so I guess we have to accept it as engineering stress although true stress actually occurs. I re-plot the graph as force (N) vs extension (mm) directly from the raw data. I think I understand which equation...
Hi Studiot! Thanks for your reply! We use the program and machine in the lab to determine the mechanical properties of biological materials. Then we use the mechanical data to look for patterns and research the cellular basis of the material's strength. UTS should be in Pa and that is force over...
Hey guys!
I'm really stuck and would be grateful for any help. I'm a postgraduate researcher, though not a physicist so this may be a relatively simple problem for some of you (I hope!).
I use a program called Bluehill which is coupled with an Instron machine. The instron is a mechanical...