REDUCED INTEGRATION - HOURGLASS CONTROL for 3D HEXAHEDRAL ELEMENTS

[ikoutrom]

Hello,

I wanted to ask whether FEAP has the capability for 1-point quadrature and hourglass control in hexahedral, 3D solid elements.
If so, would it be possible to explain how I can define the properties of a solid, linear elastic material with one-point quadrature and
the hourglass stiffness values?

Thank you very much,

Yannis Koutromanos

[FEAP_Admin]

You can define the quadrature order but there is no hourglass control.
Quadrature order is set by material set with the line
QUADrature order q-int q-print
q-int is used for integration and q-print for output purposes.  See the user
manual for further details.  If you want stabilization you will have to add it
to the element.

[Prof. R.L. Taylor]

Version 8.4 should have the mean jacobian element of Bonet and Bhargava.  The element is accessed using:

     solid
        elastic  ---- models you want
        disp stab alpha

Default for alpha is 0.0001 -- this is the parameter to stabilize the modes.

Earlier versions do not have the element.