OS-V: 0050 Skew Plate Normal Pressure

Test No. LE6 OptiStruct examines the maximum principal stress on the lower surface at the plate center point E for linear static analysis.



Figure 1.

Benchmark Model

Quad4 and Quad8 elements are used to create a uniform mesh on the skew plate with 4 elements as coarse mesh and 16 elements as fine mesh. The plate is simply supported at all the four edges. A Normal pressure of -0.7 KPa is applied on the face of the plate in the vertical z-direction.

The material properties are:
Young's Modulus
210 x 103 MPa
Poisson's Ratio
0.3

Linear Static Analysis Results

All results are normalized with the target value (0.802 MPa).
Quadrilateral Shell Maximum principal stress on the lower surface at the plate center point E (MPa) Normalized with the Target Value
Quad8 coarse 0.8294 0.96696407
Quad8 fine 0.7869 1.019189224

Model Files

The model files used in this example include:

<install_directory>/demos/hwsolvers/optistruct/verification
  • /le6quad8c.fem
  • /le6quad8f.fem

Reference

NAFEMS Ltd, The Standard NAFEMS BENCHMARKS TNSB Rev. 3, NAFEMS Ltd, Scottish Enterprise Technology Park, Whitworth Building, East Kilbride, Glasgow, United Kingdom, 1990.