Where is it best to place a strain gauge to measure the twist of a beam? And what type of gauge is best?
In my application, I have a small metal part which experiences a twisting and bending force. The beam part is 8mm wide, 9mm long, and 1.3mm thick. It is fixed at the two screw holes, and a force is applied to the little flat rectangular patch at the end of the cylinder.
As you can see in the image, most of the stress occurs around the root of the beam, but I'm not quite sure which areas on the surface are experiencing compression, and which are experiencing tension.