Depending on the composite modeling, the following properties are supplied in RADIOSS for composite.

For Shell element

/PROP/PCOMPP is used to stack sequence of the elements through the /STACK and /PLY option.

 

N, Thick, and ti

In the /PROP/TYPE9 property only, N means the number of integration points through the thickness. In the other properties, it means the number of layers. Thick means the shell thickness in all the above properties. The thickness of each layer is Thick / N in the above properties, except for /PROP/TYPE9. The layer thicknesses in these properties are equal, but with /PROP/TYPE11, /PROP/TYPE16, /PROP/TYPE17, /PROP/TYPE19, and /PROP/TYPE51 different layer thickness can be defined with an additional flag ti. In this case should be equal to Thick.

Reference vector V and Angle

Reference vector V can be defined with VX, VY, and VZ coordinates or with skew as alternative in properties TYPE11, TYPE16, TYPE17, TYPE19 and TYPE51. If the reference vector is defined with skew, then its X-axis replaces the global vector V. VX, VY, and VZ coordinates are ignored.

Material direction 1 can be defined with the reference vector V and angle . The reference vector V. The reference vector V project to shell element and turn ϕ degree is the material direction 1 (figure below). The material direction 1 of the local element reference is the orthotropy or fiber direction. With these parameters the material character (E-Module, yield stress, and so on) of direction 1 which defined in material law can then be applied in the correct direction on local element reference.

Layer (ply) and stack

In /PROP/TYPE10, /PROP/TYPE11, /PROP/TYPE16, /PROP/TYPE17, /PROP/TYPE19 and /PROP/TYPE51 more than one layer can be defined. The layer character is defined with Angle , layer thickness ti, layer position Zi and layer material Mat_IDi. In /PROP/TYPE10 only different material direction 1 can be defined with , which means the same material, same thickness and same layer position are used with this property. In /PROP/TYPE11, /PROP/TYPE16, /PROP/TYPE17, /PROP/TYPE19, and /PROP/TYPE51 different layers with different material direction 1 (), different material, different thickness and different layer position can be defined.

/PROP/TYPE19 is used in combination with /PROP/TYPE17 (or /PROP/TYPE51) to create ply-based sandwich composite properties. Only one layer can be defined in one /PROP/TYPE19 card. Layers can be combined directly to stack in /PROP/TYPE17 (or /PROP/TYPE51) or layers can first be combined as substacks, then several substacks combined to stack.

The new composite technology allows you to make parts production more and thicker, as modeling those parts with shell elements is not enough. Thick shell can solve this problem.

For Solid element, use the following thick shell properties:

Reference vector V and Angle

Similar to shell property /PROP/TYPE11, reference vector V and angle are used to define the material direction 1. The reference vector V project to the middle surface of solid element and turn degree is the material direction 1 (figure below).

With /PROP/TYPE21, only one layer can be defined. With /PROP/TYPE22, more than one layer can be defined, different material direction 1 (use ), different thickness and different material can be specified for each layer. In /PROP/TYPE22 thickness ratio (layer thickness/solid thickness) is used to define layer thickness.

See Also:

/DRAPE

Layer thickness and layer position in /PROP/TYPE11 and /PROP/TYPE16 in FAQs