- #1
Gunde
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If you look at a engineering stress-strain curve compared to the true* stress-strain curve of a steel for example, they start to differ somewhere after the yield point. Before the yield point they seem to be the same.
If you look at the specimen in the in the elastic region, as it deforms elastic it also becomes a bit thinner. I’m thinking that the true stress-strain curve should differ from the engineering curve, also in the elastic region. But it don’t seem that whey. The true curve should tilt a bit more upward as the specimen gets under strain, still in the elastic region.
Is this deviation to small to be noticed or am whey off in my thinking here?
Thanks!
*(calculated for the actual diameter of the specimen when it deforms under strain)
If you look at the specimen in the in the elastic region, as it deforms elastic it also becomes a bit thinner. I’m thinking that the true stress-strain curve should differ from the engineering curve, also in the elastic region. But it don’t seem that whey. The true curve should tilt a bit more upward as the specimen gets under strain, still in the elastic region.
Is this deviation to small to be noticed or am whey off in my thinking here?
Thanks!
*(calculated for the actual diameter of the specimen when it deforms under strain)