Variable Properties along a Beam

Hello everyone,

I would like to know whether it is possible to have a varying young modulus, and/or shear modulus along a beam. And for a varying cross-section ?
If yes, how does it work ?

Thank you in advance for your consideration,
Regards

Hey,
a varying cross section will be possible in the next release. The Young’s modulus cannot be changed.
You could try if the changing cross section already works in the old release with the additional input text but no guarantee that it will work (correctly):
EL-PROP 1 : BEAM_3D_NURBS_KLRod
MAT= EL-MAT 1
AREA = 0.02
IY = 6.66666666666667E-05
IZ = 1.66666666666667E-05
IT = 4.5775E-05
PRESTRESS = 0
PRESTRESS_BEND_1 = 0
PRESTRESS_BEND_2 = 0
PRESTRESS_TOR = 0
INT_TYPE_BEAM_3D_NURBS_KLRod = FULL
!U n1 n2 n3
AXIS 0 0 0 -1
AXIS 0.25 0 0 -1
USE_VAR_CROSSSECTION = 1
!U r h w
VAR_HEIGHTWIDTH 0 0.2 0.1
VAR_HEIGHTWIDTH 0.25 0.5 0.1
!==================================

The only other way is to split the curve and assign different cross section / E to the subcurves. However, if you split the curve in many small elements, you have to take care of the penalty factor for the coupling as this acts like a spring inbetween the elements. It has to be larger than your beam/cable stiffness.