OS-V: 0020 Cylinder Shell Patch

Test No. LE2 OptiStruct examines the outer surface tangential stress θ ​ − ​ θ at point E for linear static analysis.



Figure 1. FE Model with Boundary Conditions and Loadcases

Model Files

Before you begin, copy the file(s) used in this problem to your working directory.

Benchmark Model

Quad8 elements are used to create a mesh on the cylindrical patch with 4 elements for the load case 1 and Quad4 elements are used to create a mesh with 16 elements for the load case 2. All the translations and rotations are constrained at edge AB, z-translation and normal rotations are constrained at the edges AD and BC. For Load case 1 a uniform normal edge moment of 1.0 kNm/m is applied on the edge DC and for the Load case 2, uniform outward normal pressure of 0.6 MPa is applied on the mid surface ABCD and a tangential outward normal pressure of 60.0 MPa is applied on edge DC.

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

Linear Static Analysis Results

All results are normalized with the target value (60.0 MPa).
  Surface Tangential Stress θ ​ − ​ θ at Point E (MPa) Normalized with the Target Value
Load Case 1: Quad8 58.03 1.033947958
Load Case 2: Quad4 58.92 1.018329939

Reference

NAFEMS R0015 - Selected benchmarks for natural frequency analysis