The discussion revolves around determining the proof stress of heat-treated tool steel, particularly focusing on the challenges faced in understanding and calculating it from load-extension data. The scope includes conceptual clarification and homework-related inquiries.
Participants express varying levels of understanding regarding the proof stress concept and its calculation. There is no consensus on the method to determine proof stress, and some participants indicate confusion about the relationship between load, extension, and the stress/strain curve.
Limitations include potential misunderstandings of the proof stress definition, the need for clarity on the stress/strain curve, and the implications of extension without load increase. The discussion does not resolve these issues.
One has to transform the load to stress, and the extension to strain.aussiebeef said:Proof stress is .2% of the original cross sectional area, then measure line out of the 0.2% strain parallel to the stress/strain line until it hits the stress/strain curve. I think that's what it means but I can't see a curve on the stress/strain line I don't what really to do.
Yeah its homework lol