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Singular plastic element: NASTRAN implementation and application (1977)

Lorensen, W. E. ; Hussain, M. A. ; Pu, S. L.

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Publication Date: 2016-06-07

Description: The elastic and plastic singularities near a crack tip are obtained from higher order isoparametric elements. This is simply accomplished by collapsing the quadrilateral element into the triangular element and by judicious choice of adjacent mid-side nodes. Specifically for the cubic element the elastic singularity is obtained by placing the mid-side nodes adjacent to the crack tip at 1/9th and 4/9th locations. The plastic singularity is constructed using the sliding node concept. These elements have been implemented in NASTRAN as user dummy elements.

Keywords: STRUCTURAL MECHANICS

Type: NASA, Washington 6th NASTRAN (R) Users' Colloq.; p 257-273

Format: text

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