Are 2D solid elements AxisSymmetric Ready?

[Rodgers]

I was looking at the code for FourNodeQuad, it appears to me that this element is not ready for axisSymmetric materials.

AxisSymmetric materials takes a strain vector of four components, but FourNodeQuad is only giving three as in the member function "update".

Besides, when calculating element tangent stiffness matrix, the integrand should be multiplied by "r" (or x in the code), but this isn't done.

Am I missing something? How do you guys actually use those axisSymmetric materials like J2AxisSym and MultiaxialCyclicPlasticAxiSymm?

Thanks!

[fmk]

you are missing something .. the FourNodeQuad only deals with PlaneStrain or PlaneStress material types .. have a look at the constructor .. if you want to play with axisymmetric material you have to use the COnstantPressureVolumeQuad or the NineNodeMixedQuad.

[Rodgers]

Thanks Frank! That sure clear things up.

Next time I will first go into the constructor and there I will find which types of materials are supported.