Note: Element type numbering is a hangover from the Ideas Master Series universal file numbering system, if your wondering.

## MASS ELEMENT TYPE 161

Used to add point masses to a node only has value when adding acceleration body loads.

3 dof 1,2,3 per node

stiffness matrix 3*3 all zero

3 dof 1,2,3 per node

stiffness matrix 3*3 all zero

## translational spring TYPE 136

General translational spring element used for connecting parts etc. Generally this element should have coincident nodes and therefore has no orientation. The orientation will be taken as global unless a coordinate system is attached.

It can also be used as a conductive link in thermal analysis.

Stiffness value are supplied on the property card as kx,ky,kz These values are in the global coordinate system if no coordinate system has been applied else the stiffnesses are in the supplied system..

3 dof 1,2,3 per node

stiffness matrix 6*6

It can also be used as a conductive link in thermal analysis.

Stiffness value are supplied on the property card as kx,ky,kz These values are in the global coordinate system if no coordinate system has been applied else the stiffnesses are in the supplied system..

3 dof 1,2,3 per node

stiffness matrix 6*6

## Rotational SPRING TYPE 137

Essentially the same format as the translational spring.

Stiffness value are supplied on the property card as krx,kry,krz These values are in the global coordinate system if no coordinate system has been applied else the stiffnesses are in the supplied system.

No mass contribution to body loads for this element.

3 dof 4,5,6 per node

stiffness matrix 6*6

Stiffness value are supplied on the property card as krx,kry,krz These values are in the global coordinate system if no coordinate system has been applied else the stiffnesses are in the supplied system.

No mass contribution to body loads for this element.

3 dof 4,5,6 per node

stiffness matrix 6*6

## ROD TYPE 11

Pin jointed ROD element with only axial stiffnes EA/L

Axial stiffiness calculated as EA/l

Area and material ID specified on the ROD property card.

It's nodal mass is calculated if body accelerations are applied, 1/2 the mass at each node.

3 dof 1,2,3 per node

stiffness matrix 6*6

Area and material ID specified on the ROD property card.

It's nodal mass is calculated if body accelerations are applied, 1/2 the mass at each node.

3 dof 1,2,3 per node

stiffness matrix 6*6

## BEAM ELEMENT TYPE 21

General purpose beam element - current key in sections available:-

The height direction specified when entering the property values for the section is in the y direction. The beam up vector specifies the Y direction.

FOR BEAM ELEMENTS THE UP VECTOR MUST BE SET TO DEFINE THE SECTION Y DIRECTION.

- ROD
- BAR
- TUBE
- BOX - J property (torsion) currently incorrect (WIP)

The height direction specified when entering the property values for the section is in the y direction. The beam up vector specifies the Y direction.

FOR BEAM ELEMENTS THE UP VECTOR MUST BE SET TO DEFINE THE SECTION Y DIRECTION.

It's nodal mass contributions are calculated if body accelerations are applied, 1/2 the mass at each node.

6 dof 1,2,3,4,5,6 per node

stiffness matrix 12*12

Note : Beam offset are not supported in M3d's solver at present they are included for import and export to Nastran.

6 dof 1,2,3,4,5,6 per node

stiffness matrix 12*12

Note : Beam offset are not supported in M3d's solver at present they are included for import and export to Nastran.

## TRI ELEMENT TYPE 91

Mindlin–Reissner shell element

It's nodal mass contributions are calculated if body accelerations are applied by shape function integration.

6 dof 1,2,3,4,5,6 per node

stiffness matrix 18*18

THIS ELEMENT IS NOT RECOMMENDED AND SHOULD ONLY BE USED FOR TRANSITIONS (WIP)

Note : Shell offset are not supported in M3d's solver at present they are included for import and export to Nastran.

6 dof 1,2,3,4,5,6 per node

stiffness matrix 18*18

THIS ELEMENT IS NOT RECOMMENDED AND SHOULD ONLY BE USED FOR TRANSITIONS (WIP)

Note : Shell offset are not supported in M3d's solver at present they are included for import and export to Nastran.

## QUAD TYPE 94

Mindlin–Reissner shell element

It's nodal mass contributions are calculated if body accelerations are applied by shape function integration.

6 dof 1,2,3,4,5,6 per node

stiffness matrix 24*24

Note : Shell offset are not supported in M3d's solver at present they are included for import and export to Nastran.

6 dof 1,2,3,4,5,6 per node

stiffness matrix 24*24

Note : Shell offset are not supported in M3d's solver at present they are included for import and export to Nastran.

## LINEAR TET TYPE 111

Linear serendipity tetrahedron element.

It's nodal mass contribution are calculated if body accelerations are applied by shape function integration.

3 dof 1,2,3 per node

stiffness matrix 12*12

3 dof 1,2,3 per node

stiffness matrix 12*12

## LINEAR WEDGE TYPE 112

Linear serendipity wedge element.

It's nodal mass contribution are calculated if body accelerations are applied by shape function integration.

3 dof 1,2,3 per node

stiffness matrix 18*18

3 dof 1,2,3 per node

stiffness matrix 18*18

## linear Hexahedral type 115

Linear hexahedral element.

It's nodal mass contribution are calculated if body accelerations are applied by shape function integration.

3 dof 1,2,3 per node

stiffness matrix 24*24

3 dof 1,2,3 per node

stiffness matrix 24*24