VIII-2 elastic-plastic sample stress strain data points for verification
VIII-2 elastic-plastic sample stress strain data points for verification
(OP)
Would anyone be willing to post your elastic-plastic stress-strain data points (per Annex 3-D) for a material such as SA-516 so that I can compare it to my MathCAD results?
thanks
thanks





RE: VIII-2 elastic-plastic sample stress strain data points for verification
RE: VIII-2 elastic-plastic sample stress strain data points for verification
RE: VIII-2 elastic-plastic sample stress strain data points for verification
RE: VIII-2 elastic-plastic sample stress strain data points for verification
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RE: VIII-2 elastic-plastic sample stress strain data points for verification
I expected plastic strain = ε_t(σ) - ε_p. Whereas, you calculated plastic strain = ε_t(σ) - σ/E_y.
My version keeps the elastic strain constant (equal to ε_p); however your elastic strain continues past the proportional limit (as σ/E_y).
Is this a result of how your FE software expects the data; or am I misinterpreting something?
I've attached a screenshot of my data. Row "C" is my interpretation of the plastic strain; and row "D" is how I reverse engineered your interpretation (equal to your dataset posted previously).
thanks,
Dave
RE: VIII-2 elastic-plastic sample stress strain data points for verification
I'm not sure how you made your interpretation from Annex 3-D? Your interpretation is incorrect. Refer to equation 3-D.1. gamma_1 + gamma_2 IS the plastic strain, which when added to the elastic strain, gives you the total strain.
RE: VIII-2 elastic-plastic sample stress strain data points for verification
My incorrect interpretation was formed based on how I believed material behaves beyond the proportional limit. I did not think that additional elastic strain (equal to sigma/E) would form in the plastic region. I was under the assumption that elastic strain's upper bound was equal to the strain at the proportional limit.
RE: VIII-2 elastic-plastic sample stress strain data points for verification
Have you considered taking a course on this topic (VIII-2 Part 5)?
RE: VIII-2 elastic-plastic sample stress strain data points for verification