Stress Computations for Nearly Incompressible Materials

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by Barna A. Szabó, Washington Univ, United States,

Document Type: Proceeding Paper

Part of: Computer Utilization in Structural Engineering:

Abstract: Computation of stresses by the finite element method (FEM) in the case of nearly incompressible isotropic elastic materials is discussed. It is shown that for moderately high Poisson's ratios (up to about 0.49) no special procedures are required when the p- or hp-versions of the FEM is used. For higher Poisson ratios the differences of normal stresses and the shear stresses can be computed accurately but computation of the sum of normal stresses requires special procedures. An example, suitable for benchmark computations, is presented.

Subject Headings: Finite element method | Shear stress | Computing in civil engineering | Elastic analysis | Poisson ratio | Isotropy | Construction materials | Case studies |

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