I was told to do a torsion test in the lab, but without using the machine, I was given a chalk(specimen), a thread, some loads, and a G-clamp. I'm not supposed to use any other scientific apparatus. but I can use things we can found in our daily life, for example, pen, pencil, eraser, etc... but i don't think those things help much.
I thought of doing it this way. fix one end of the chalk on the table with the G-clamp so that the chalk looks horizontal, then put some load at the other end with the loads connected to the chalk by the thread. Then, I will add the load until the chalk breaks. However, i think that is more like a bending test than a torsion test for me. It didn't give the effect of twisting for this case... What should I do?