Truss Example

# Truss Example - EXAMPLE CREATING A MODEL OF AN OVERHEAD...

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EXAMPLE: CREATING A MODEL OF AN OVERHEAD HOIST WITH ABAQUS/CAE The instructions for the examples discussed in this manual will focus on using the Model Tree to access the functionality of ABAQUS/CAE. Menu bar actions will be considered only when necessary (e.g., when creating a Fnite element mesh or postprocessing results). 2.3 Example: creating a model of an overhead hoist with ABAQUS/CAE This example of an overhead hoist, shown in ±igure 2–5, leads you through the ABAQUS/CAE modeling process by using the Model Tree and showing you the basic steps used to create and analyze a simple model. The hoist is a simple, pin-jointed framework that is constrained at the left end and mounted on rollers at the right end. The members can rotate freely at the joints. The frame is prevented from moving out of plane. A simulation is Frst performed in ABAQUS/Standard to determine the structure’s static deﬂection and the peak stress in its members when a 10 kN load is applied as shown in ±igure 2–5. The simulation is performed a second time in ABAQUS/Explicit under the assumption that the load is applied suddenly to study the dynamic response of the frame. 1 m 1 m 1 m 1 m 1 m 10,000 N All members are circular steel rods, 5 mm in diameter. Material properties General properties: Elastic properties: ρ 7800 kg/m 3 = E 200 10 9 Pa × = ν 0.3 = Figure 2–5 Schematic of an overhead hoist. 2–12

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EXAMPLE: CREATING A MODEL OF AN OVERHEAD HOIST WITH ABAQUS/CAE For the overhead hoist example, you will perform the following tasks: Sketch the two-dimensional geometry and create a part representing the frame. De±ne the material properties and section properties of the frame. Assemble the model. Con±gure the analysis procedure and output requests. Apply loads and boundary conditions to the frame. Mesh the frame. Create a job and submit it for analysis. View the results of the analysis. A Python script for this example is provided in “Overhead hoist frame,” Section A.1, in the online version of this manual. When this script is run in ABAQUS/CAE, it creates the complete analysis model for this problem. Run the script if you encounter dif±culties following the instructions given below or if you wish to check your work. Instructions on how to fetch and run the script are given in Appendix A, “Example Files.” As noted earlier, it is assumed that you will be using ABAQUS/CAE to generate the model. However, if you do not have access to ABAQUS/CAE or another preprocessor, the input ±le that de±nes this problem can be created manually, as discussed in “Creating an input ±le,” Section 2.3 of Getting Started with ABAQUS/Standard: Keywords Version. 2.3.1 Units Before starting to de±ne this or any model, you need to decide which system of units you will use.
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Truss Example - EXAMPLE CREATING A MODEL OF AN OVERHEAD...

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