Introduction

*CONTROL_ENERGY
Bar Impact
LS-DYNA Manual Section: *CONTROL_ENERGY

Example: Bar Impact

Filename: control_energy.bar-impact.k

Description:
A copper bar strikes a wall.

Model:
A 1/4 symmetry bar measures 0.32 cm in radius and 3.24 cm in length and
contains 972 hexahedron element. The bar starts at 0.0227 cm/ usec and stops at
0 cm/ usec. Th e calculation illustrates the energy balance where
E = KE + IE + HGE.

Input:
The hour glass en ergy is computed at a ne gligible cost. (*CONTRO L_ENERGY)
The initial velocity for every node is set to -0.0227 except the nodes at z = 0.

Results:
The undeformed and de formed shape of the b ar are shown. The total, kinetic,
internal and hourglass energies are also shown.