# OS-V: 0020 Cylinder Shell Patch

Test No. LE2 OptiStruct examines the outer surface tangential stress $\theta \text{​}-\text{​}\theta$ at point E for linear static analysis.

## 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 $\theta \text{​}-\text{​}\theta$ at Point E (MPa) Normalized with the Target Value