Stress resultant plasticity for shells revisited
ID Dujc, Jaka (Author), ID Brank, Boštjan (Author)

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PID: 20.500.12556/rul/74b460ac-8072-4c01-911c-9cfce638073c

In this work, we revisit the stress resultant elastoplastic geometrically exact shell finite element formulation that is based on the Ilyushin–Shapiro two-surface yield function with isotropic and kinematic hardening. The main focus is on implicit projection algorithms for computation of updated values of internal variables for stress resultant shell elastoplasticity. Four different algorithms are derived and compared. Three of them yield practically identical final results, yet they differ considerably in computational efficiency and implementation complexity, since they solve different sets of equations and they use different procedures that choose active yield surfaces. One algorithm does not provide acceptable accuracy. It turns out that the most simple and straightforward algorithm performs surprisingly well and efficiently. Several numerical examples are presented to illustrate the Ilyushin–Shapiro stress resultant shell formulation and the numerical performance of the presented integration algorithms.

Keywords:večploskovna plastičnost, lupine, integracijski algoritmi, multi-surface plasticity, shells, integration algorithms
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Number of pages:Str. 146-165
Numbering:Letn. 247/248, Letn. 247/248
PID:20.500.12556/RUL-32203 This link opens in a new window
ISSN on article:0045-7825
DOI:10.1016/j.cma.2012.07.012 This link opens in a new window
COBISS.SI-ID:5921121 This link opens in a new window
Publication date in RUL:10.07.2015
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Title:Computer methods in applied mechanics and engineering
Shortened title:Comput. methods appl. mech. eng.
COBISS.SI-ID:6695685 This link opens in a new window

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