Formulation of stiffness equation for a three-dimensional isoparametric element with elastic-plastic material and large deformation
The formulation of the stiffness equation for an 8 to 21 node isoparametric element with elastic-plastic material and large deformation is presented. The formulation has been implemented in a nonlinear finite element program for the analysis of three-dimensional continuums. To demonstrate the utility of the formulation, a thick-walled cylinder was analyzed and the results are compared favorably with a known solution. The element type presented can be applied not only to 3-D continuums, but also to plate or shell structures, for which degenerated isoparametric elements may be used. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y. (USA)
- NSA Number:
- NSA-33-014609
- OSTI ID:
- 4091809
- Report Number(s):
- BNL--20684
- Country of Publication:
- United States
- Language:
- English
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