Tutorial ANSYS

...alberta.ca/tutorials/ansys/AU/ProE/ProE.htmlCopyright 2001 University of AlbertaAfter a few seconds, you will be informed that the solution is complete. Step 8. Viewing the results There are myriad possibilities for viewing FEM results. A common one is the following: General Postproc Plot Results Contour Plot Nodal Solu Pick the Von Mises stress values, and select Apply. You should now have a color fringe plot of the Von Mises stress displayed on the model. Updated: 8 November 2002 using Pro/ENGINEER 2001 RWT Please report errors or omissions to Roger Toogood University of Alberta ANSYS Tutorials www.mece.ualberta.ca/tutorials/ansys/AU/ProE/ProE.htmlCopyright 2001 University of AlbertaTwo Dimensional Truss Introduction This tutorial was created using ANSYS 7.0 to solve a simple 2D Truss problem. This is the first of four introductory ANSYS tutorials. Problem Description Determine the nodal deflections, reaction forces, and stress for the truss system shown below (E 200GPa, A 3250mm2). (Modified from Chandrupatla & Belegunda, Introduction to Finite Elements in Engineering, p.123)Preprocessing: Defining the Problem 1. Give the Simplified Version a Title (such as Bridge Truss Tutorial). In the Utility menu bar select File Change Title: The following window will appear: Enter the title and click OK. This title will appear in the bottom left corner of the Graphics Window once you begin. Note: to get the title to appear immediately, select Utility Menu Plot Replot 2. Enter Keypoints The overall geometry is defined in ANSYS using keypoints which specify various principal coordinates University of Alberta ANSYS Tutorials www.mece.ualberta.ca/tutorials/ansys/BT/Truss/Truss.htmlCopyright 2002 University of Albertato define the body. For this example, these keypoints are the ends of each truss. We are going to define 7 keypoints for the simplified structure as given in the following table (these keypoints are depicted by numbers in the above figure) From the ANSYS Main Menu select: Preprocessor Modeling Create Keypoints In Active CS The following window will then appear: To define the first keypoint which has the coordinates x 0 and y 0: keypointcoordinatex y1 0 0 2 1800 31183 3600 04 5400 31185 7200 06 9000 31187 10800 0University of Alberta ANSYS Tutorials www.mece.ualberta.ca/tutorials/ansys/BT/Truss/Truss.htmlCopyright 2002 University of AlbertaEnter keypoint number 1 in the appropriate box, and enter the x,y coordinates: 0, 0 in their appropriate boxes (as shown above). Click Apply to accept what you have typed. Enter the remaining keypoints using the same method. Note: When entering the final data point, click on OK to indicate that you are finished entering keypoints. If you first press Apply and then OK for the final keypoint, you will have defined it twice! If you did press Apply for the final point, simply press Cancel to close this dialog box. Units Note the units of measure (ie mm) were not specified. It is the responsibility of the user to ensure that a consistent set of units are used for the problem thus making any conversions where necessary. Correcting Mistakes When defining keypoints, lines, areas, volumes, elements, constraints and loads you are bound to make mistakes. Fortunately these are easily corrected so that you dont need to begin from scratch every time an error is made! Every Create menu for generating these various entities also has a corresponding Delete menu for fixing things up. 3. Form Lines The keypoints must now be connected We will use the mouse to select the keypoints to form the lines. In the main menu select: Preprocessor Modeling Create Lines Lines In Active Coord. The following window will then appear: Use the mouse to pick keypoint #1 (i.e. click on it). It will now be marked by a small yellow box. University of Alberta ANSYS Tutorials www.mece.ualberta.ca/tutorials/ansys/BT/Truss/Truss.htmlCopyright 2002 University of Alberta Now move the mouse toward keypoint #2. A line will now show on the screen joining these two points. Left click and a permanent line will appear. Connect the remaining keypoints using the same method. When youre done, click on OK in the Lines in Active Coord window, minimize the Lines menu and the Create menu. Your ANSYS Graphics window should look similar to the following figure. Disappearing Lines Please note that any lines you have created may disappear throughout your analysis. However, they have most likely NOT been deleted. If this occurs at any time from the Utility Menu select: Plot Lines 4. Define the Type of Element It is now necessary to create elements. This is called meshing. ANSYS first needs to know what kind of elements to use for our problem: From the Preprocessor Menu, select: Element Type Add/Edit/Delete. The following window will then appear: University of Alberta ANSYS Tutorials www.mece.ualberta.ca/tutorials/ansys/BT/Truss/Truss.htmlCopyright 2002 University of Alberta Click on the Add. button. The following window will appear: For t...

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