Spurious modes in two-dimensional isoparametric elements

✍ Scribed by N. Bićcanić; E. Hinton

• Publisher: John Wiley and Sons
• Year: 1979
• Tongue: English
• Weight: 555 KB
• Volume: 14
• Category: Article
• ISSN: 0029-5981
• DOI: 10.1002/nme.1620141009

✦ Synopsis

The reasons for the presence of spurious modes in plane isoparametric elements are examined. Eigenvalue and eigenvector analyses of stiffness matrices for single elements and unconstrained and constrained meshes reveal the types of mechanisms and near-mechanisms that can be expected when reduced or selective integration techniques are used with quadrilateral isoparametric elements in the analysis of plane strain problems.