VM141
VM141
Diametral Compression of a Disk
Test Case
Two equal and opposite forces act along the vertical diameter
of a disk as shown. Determine the compressive stress at the center
of the disk and on the major horizontal diameter at 0.1 in. from the
center.
Analysis Assumptions and Modeling Notes
The problem is solved first using plane stress elements (PLANE82 and
PLANE183), then using shell elements (SHELL281)
with the substructure analysis and expansion pass. In the second case, the model is created as a
superelement only to illustrate the procedure for substructure capability. Third and fourth
solution is done using finite-strain shell elements SHELL181 and
SHELL281.
A one-fourth symmetry model is used. Three element types and
the corresponding element type modifications are used only for various
printout control purposes. One half of the load is applied because
of symmetry. POST1 is used to extract results from the solution phase.
Since the midside nodal stresses are not available in POST1, path
operations are performed to get the compressive stress at 0.1 in.
from the center of the disk.
