Accurate numerical solutions for elastic-plastic models. [LMFBR]

Technical Report · Sat Mar 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5335488· OSTI ID:5335488

Schreyer, H. L.; Kulak, R. F.; Kramer, J. M.

The accuracy of two integration algorithms is studied for the common engineering condition of a von Mises, isotropic hardening model under plane stress. Errors in stress predictions for given total strain increments are expressed with contour plots of two parameters: an angle in the pi plane and the difference between the exact and computed yield-surface radii. The two methods are the tangent-predictor/radial-return approach and the elastic-predictor/radial-corrector algorithm originally developed by Mendelson. The accuracy of a combined tangent-predictor/radial-corrector algorithm is also investigated.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5335488
• Report Number(s): ANL-80-31; TRN: 80-009364
• Country of Publication: United States
• Language: English

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