Oasys LS-DYNA Environment 8.1 VOLUME 3 ... - Oasys Software

Oasys LS-DYNA Environment: User Guide (Version 8.1)
LS-DYNA Manual Section: *CONTROL_SHELL
Example of: Hemispherical Load
Example Filenames: hemi_load.key
Description:
A spherical shell is subjected to two outward point loads on the x-axis and two inward point loads
on the y-axis.
Model:
The 1/8 symmetry model of a sphere measures 10 inches in radius with a thickness of 0.04 inches.
The model contains 48 shell elements. A force of one pound is applied in the positive x-direction
to the node on the x-axis. A force of one pound is applied in the negative y-direction to the node
on the y-axis. The calculation terminates at 0.018 seconds.
Input:
The element formulation used is the Hughes-Liu shell. If the Belytschko Tsay shell was used
the Belytschko-Wang-Chiang warpage stiffness option (*CONTROL_SHELL) would also have to
be use. The concentrated loads are applied to two nodes (*DEFINE_CURVE,
*LOAD_NODE_POINT).
Results:
The oscillation of the node on the z-axis shows a regular oscillatory behavior.
Reference:
Belytschko, T., Wang and Chiang.
Page A.67