Force

A force is a push or pull upon an object resulting from the object’s interaction with another object.

F = m x a

Force is measured using Newton.

1 N = 1 kg x m/s²

Force is a vector quantity. It has both magnitude and direction. Because it have direction so we have to apply direction at time of applying load.

Analysis Type – This boundary condition are available in only following ANSYS Analysis type

• Static Structural
• Transient Structural
• Harmonic Response
• Explicit Dynamics

Properties of Boundary Condition

Dimensional Analysis

• 3D Simulation: Supported
• 2D Simulation: Supported, Force load are not supported for 2D axis-symmetric explicit dynamic analysis.

Geometry Type

• Solid: Supported
• Surface/Shell: Supported
• Wire body/ line body / Beam: Supported

Topology

• Body: Not Supported
• Face: Supported

            Force will convert into pressure based on total area of all selected face.  If selected faces are not connected to each other or are from different part then there will be no selection.

• Edge: Supported

             If you select multiple edge, the magnitude of the force is distributed equally over all selected edge. If you select multiple selection without connected to each other, then no selection will occure.

• Vertex: Supported

           If you will select multiple vertices when defining the force, the force magnitude will be distributed evenly across all selected vertices.

• Node: Supported

Deformation

Deformation is change in shape or size due to load or temperature variation. but in ANSYS, Deformation is displacement of a point from its initial position. Deformations are calculated relative to the part or assembly world coordinate system

Deformation have three different component as follows

1. Ux

2. Uy

3. Uz

theses are called Directional Deformation in ANSYS.

After combination of these, that are called Total Deformation

Problem 1: anaysis using APDL : 3D Analysis of beam with Concentrated Load on Corner

Firstly Go to ANSYS>ANSYS APDL Product Launcher. New window will open. Select ANSYS Multiphysiscs  under the License. Now click on Run Tab.

Now New window will open.

Now you Go to Main Menu > Preferences. New dialog box Preferences for GUI Filtering will open. Select structural in Dailog Box. Then click on OK tab.

Now Go to Main Menu > Preprocessor > Element Type > Add/Edit/Delete. Then new dialog box with name of Elements type will open. Now, click on Add…. Then a new dialog box will open Library of Element Types will open. Select solid in first dialog box and 20node 186 in second column. Then click on OK button. Then dialog box will be close. Then click on Close tab in Elements type dialog box.

Now go to Main Menu > Preprocessor > Material Models. New dailog box Define Material Model Behaviour will will open. Select Material Model number 1 From Material Model Defined Column. Then select Structural > Linear > Isotropic from Material Models Available column.

Then new dialog box Linear Isotropic Properties for Material Number 1 will open. Type 200000000000 in Ex and 0.3 in PRXY. Now click on OK Button to close dialog box. Now close Define Material Model Behaviour dialog box.

Now go to Main Menu>Preprocessor > Modeling > Create > Volumes > Block > By Dimensions. Now new dialog Box Create Dialog Box by Dimensions will open.

Insert 0, 2, 0, 0.25, 0, and 0.08 in X1, X2, Y1, Y2, Z1 and Z2 field respectively.

Click on OK to generate the required geometry.

Now go to Main Menu > Preprocessor > Meshing > Size control > Manual Size > Global > Size. New Dialog box Global Element sizes will open. Type 0.01 in Size Element edge length insert field (As per your system resources are available). Click on Ok to close the dialog box.

Now go to Main Menu > Preprocessor > Meshing >Mesh Tool. A new dialog box will come in right side,  named Mesh tool. Click on Mesh Button. Then new dialog box will open. Then you have to select the geometry. Then click on OK button.

Now meshing is started.

When meshing is done, click on Close button to close the Mesh tool dialog box.

Now go to Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Displacement > on Areas.

Then a new dialog box will open. Select face on which you have to apply fixed support. Then click on Ok button in dialog box.

Then a new dialog box will open. Select All DOF in DOFs to be constrained selection field. This will restrict all the degree of freedom at specified Surface. Then click on OK button in Dialog Box to apply the condition and close the dialog Box.

Now go to Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Force/Moment > On Keypoints. Then new dialog box will open. Now select the point where you want to apply load. Click on Ok button to apply & close the dialog box.

Then new dialog box Apply F/M on KPs will open. Select FY from Direction of force/mom selection field. Type -1000 in Force/moment value insert field. Now click on OK button.

Now go to Main Menu > Solution > Current LS. New dialog box will be open. Click on OK button to start analysis.

Now solution is done.

Now go to Main Menu > General PostProc > Plot Results > Contour Plot > Nodal Solu. New dialog box will open. Now go to Nodal Solution > DOF Solution > Displacement vector sum. Click on OK button to apply this.

Then the following Result will come.

Problem 1: anaysis using workbench : 3D Analysis of beam with Concentrated Load on Corner

For the analysis in Workbench, we have to divide the procedure in following step.

• Geometry
• Meshing
• Load and support
• Solve
• Result

In problem,

L = 2m, b = .25m, h = 0.8m, load = 1000N,

ANSYS Workbench

First go All Programs>ANSYS16.0>workbench, for open the workbench for analysis.

Then new window will open as shown below. This is welcome window of ANSYS workbench. In which there is Title bar, menu bar, Standard tool bar, toolbox, Project Schematic and properties of Project Schematic.

Go to Toolbox > Analysis System. Double click on “Static Structural” for structural analysis. Static structural analysis System will come on Project schematic.

Default material is Structural steel. So we do not have to select material. So, we will not go in Engineering Data tab.

Now we have to create the geometry. Double Click on Geometry tab for entering in Geometry workbench.Then there will be open a window & sub window. In Sub window u have to select unit meter. Then following window will open.

Now, Go to Tree outline box, select XYPlane. Now select look At Face/Plane/Sketch  .

Now select sketching tab, there will Tab – Draw, modify, dimensions, constraints, Settings. In Draw tab, select Rectangle tab. Now select origin in drawing space for specifying first point of rectangle. Then click on opposite corner to specify the second corner of rectangle.

Now Go to Dimensions tab select General. Now select horizontal line & place it below the line. Now select Vertical line of rectangle and place it aside of line. Now go to Detail View, type 2.5 and 0.25 for H1 and V2 respectively.

Now go to create menu, select Extrude Commend.

Now select sketch1 from tree outline then go to Detail View, click on apply ahead of Geometry tab & type 0.08 m in Depth Tab. Then click on Generate Tool.   

Now Close the window.

Analysis

Now Double click on Model tab. New window will open.

Go to Outline Tab,  select mesh from tree, and now go to detail box, then  expend sizing. Now type 0.01 in Element size. (It depend on your computer resources.)

Now right click on static structural in outline box. Select Force from expended list Select point cursor from selection toolbar. Select corner of beam created. Now go in Detail Box, type 1000 in Magnitude. Click on direction, when apply button is showing, Select the top face of Beam. Then apply the direction as per need. Then click on apply.

Again right click on Static structural, select Fixed Support , select another face of As shown in figure, on which you have to apply fixed support.

Now right click on Solution, select Deformation > Totaldeformation.  Then right click on total deformation select convergence.  Now click on Solve in Toolbar.

Then you result will be look like this.

Now Again right click on solution, select probe > Deformation Probe. Select point where you want to found the result. Now select total in Result Selection.