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Pressure Load Created Edited

# Assign Pressure Loads

## Function

• Apply pressure loads to the faces or edges of plate, plane stress, plane strain, axisymmetric or solid elements. Modify or delete previously entered loads.
• The pressure loads are entered as either a uniform pressure or a linearly distributed pressure. The pressure is then converted into equivalent nodal forces in the program.
• In plate elements and plane stress elements, the pressure load is inputted on a face or edge with respect to both the global coordinate system and the element coordinate system. If the load is applied on a face, the load direction is aligned with the axis directions of the given coordinate system. If the load is applied on an edge, it is applied perpendicular to the edge (in-plane direction). In this case, the direction from the element's exterior to the edge is considered the positive (+) direction. To input the load in the opposite direction, the load value should be entered with a negative (-) sign. When applying pressure load on an edge, the load value should be entered per unit area.
• The pressure loads acting on the edges of plane strain and axisymmetric elements are entered perpendicular to the edges. The positive direction (+) refers to loadings applied towards the element edges. In addition, the pressure area is obtained by multiplying the element length by the thickness. Again, the loading is applied per unit length.
• The direction of pressure loads applied to solid elements is perpendicular to the faces. The positive direction (+) refers to loadings applied towards the element faces. The loading direction away from the faces retains the negative sign (-).
• Pressure loads applied on each element :

 (a) Pressure loads applied normally to the edges of plate, plane stress, plane strain and axisymmetric elements (b) Pressure loads acting on a face of a plate and plane stress elements (c) Pressure loads applied normally to the faces of a solid element

## Call

From the main menu, select [Load] tab > [Type : Static Loads] > [Pressure Loads] group > [Pressure Loads] > [Assign Pressure Loads]

## Input

Pressure Loads dialog box

### Load Case Name

Assign the load case name. Click the ... button to the right to enter, additional load cases and modify or delete existing load cases.

### Load Group Name

Select the desire Load Group Name. Click the ... button to the right to enter additional load group names and modify or delete existing load group names.

### Options

Add : To enter new or additional pressure loads

Replace : To replace previously entered pressure loads

Delete : To delete previously entered pressure loads

### Element Type

Select the type of elements to be subjected to pressure loads. Refer to the figure displayed to assign the loading direction and the loaded side(s).

Plate/Plane stress : Plate & plane element

Face : Out-of-plane

Edge : In-plane

Solid(Face) : Solid element

Plane Strain : Plane strain element

Axisymmetric : Axisymmetric element

### Pressure on Plate (Plane Strain, Axisymmetric, Solid) Faces

Specify the locations and directions of the pressure loads by different element types.

Selection
Specify the method of assign the locations of pressure loads

Node : Specify nodes (when loads are applied to edges or if solid elements)

Element : Specify elements

Pressure Edge
Specify the edges, which pressure loads are to be applied. The specified edge is displayed by a dotted line.

Pressure Face
In the case of solid elements, specify the face to apply pressure loads. The specified face is displyed by dotted lines.

Direction

Normal : Pressure loads applied normally to the face of solid elements

Local x : ECS x-direction of plate or plane stress elements

Local y : ECS y-direction of plate or plane stress elements

Local z : ECS z-direction of plate or plane stress elements

Global X : Pressure loads applied in GCS X-direction

Global Y : Pressure loads applied in GCS Y-direction

Global Z : Pressure loads applied in GCS Z-direction

Vector : Pressure loads are applied in the direction defined by a vector.

Projection

When the pressure loads are applied to plate or solid elements in the direction of 'Global X, Y or Z', select whether or not to project the loads on a plane perpendicular to the loading direction.

Yes : Project the pressure loads

No : Pressure loads are applied along the entire face

### Loads

Select if the loads are uniformly distributed or linearly varying. Enter the pressure load values.

Uniform : When the pressure loads are uniformly distributed

Linear : When the pressure loads vary linearly

P1, P2, P3, P4 : Pressure load values at faces or edges

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