Two improvements in formulation of nine-node element MITC9

SUMMARY The paper concerns a well‐known two‐dimensional nine‐node quadrilateral element MITC9, which is based on two‐level approximations of strains (assumed strain method). The element has good accuracy, but does not pass the patch test. As the first improvement, we propose a modification of the el...

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Veröffentlicht in:	International journal for numerical methods in engineering 2013-02, Vol.93 (6), p.612-634
Hauptverfasser:	Wisniewski, K., Panasz, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Accuracy assumed strain method coarse mesh accuracy Distortion Mathematical analysis Mathematical models nine-node element Numerical analysis patch test Patch tests sensitivity to shape distortions Strain Transformations two-dimensional MITC9 two-level approximation of strains
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