Automesh for quadratic tetrahedron

Dear sir,

I can handle Automesh for linear tetrahedron, and try Automesh for quadratic tetrahedron,but can not make sense the correct way. the menu say approach from \"Modification\" ,and add nodes ...,it make me confused.

Do you mean I need to generate linear tetrahedron by automesh first ? and then modify them to quadratic tetrahedron ?

Do you have tutorial about Automesh for quadratic tetrahedron ?

Last time, I learned to generate 3 dimensional elements for Code-Aster, it should absolutely keep all elements as the extra-elements (faces for ex.) are used to define boundary conditions.

Can or should I apply pressure to Solid element through face element ?

But, in case my FE model is all formed by solid elements, and keep face or shell elements in my model for above-mentioned purpose, does it change [K],stiffness matrix due to extra face elements included ?

Thanks

Evan

Hi sirs,

It seems to find out the solution by myself.

The procedures:

1. after linear tetrahedral elements are generated by automesh.

2. pull down upper menu \" modification \", and click \"
convert to/from quadratic\" ,the answer is there.

It is first time to try this stuff, maybe wrong,hopefully,

who can show the correct way ?

Regards

Evan