Stress/vibration analysis of a 3D structure
Part 1: Client (proposal)
You are working for a global design company. Unfortunately, the company does not have any
in‐house analysis expertise. Your supervisor asks your project team to create a 1 -2 page
proposal document to be sent out to a consultancy firm. The consultancy firm will provide
detailed structural analysis of one of your company’s designs.
The consultancy firm requires the following in the proposal document:
1. Description of the 3D structure
2. CAD model of the structure (presented as a figure in the proposal and to be made
available via a STP or IGES file)
3. Complete description of all loads, boundary conditions and constraints
4. Description of the client’s needs regarding the structural analysis (e.g. when will the
structure fail and/or resonate?)
5. All required material properties.
Structure for analysis
Your project team can select any structure to analyse providing it satisfies the following
constraints:
1. Finite element mesh must contain at least one of truss and beam elements (can be
both)
2. Finite element mesh must contain at least one of shell and 3D solid elements (can be
both)
3. The structure must have at least one complex boundary condition or constraint
Part 2: Consultancy firm (analysis of the structure)
Working in an engineering design consultancy, your supervisor asks your project team to run
a static stress-displacement (*STATIC) and normal modes of vibration (*FREQUENCY) analysis
on a 3D structure provided by a client.
Using the proposal document provided by the client (see Part 1), you must do the following:
1. Import the provided geometry into ABAQUS
2. Set up the model for finite element analysis (Part, Property, Assembly, Step,
Interaction, Loads, Mesh etc.)
3. Run a static analysis
4. Run a frequency analysis
5. Perform mesh quality and convergence studies for each analysis
6. Analyse the results based on the client’s needs
Following this, the client has requested you provide a technical report detailing your analyses
and recommendations. The report must be no longer than 20 pages including appendices and
STUDENTS PLEASE NOTE: this is a group assignment. All students are expected to
individually complete the basic FE portion of the assignment. Other tasks may be assigned
to individual members.
STUDENTS PLEASE NOTE: the more complex your structure, the more opportunity you have
to discuss advanced topics. Select the most complex structure that can be completed by
your team on time.
Each student should submit an individual report/video for this
assignment. The report can contain parts of your group members if you decide to
split up the work.
Assessment task 2 is due Thursday 4th of June at 17:00. The assignment report
is to be uploaded onto CloudDeakin. DO NOT LEAVE THIS UNTIL THE LAST
MINUTE.
references. They have also requested that your project team give a short technical
presentation to senior staff.
Requirements for the report
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Submit in the prescribed format for your consultancy firm (provided separately). Executive summary at the beginning of the report (look this up if you are unsure). Introduction to the problem. Summary of the finite element model—element type selection, load types, boundary conditions, material model, etc. Include detailed images of the mesh and discuss mesh quality/density/convergence, etc. Report on stress and displacement results for the *STATIC load case. Include and refer to images of deformation and stress contour plots. Specifically refer to the client’s needs regarding the analysis (e.g. maximum displacement and whether yielding has |
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occurred). Ensure you choose a suitable stress criterion for yield analysis (e.g. von
Mises).
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Report on the first six natural frequencies and the associated shapes(eigenvectors). Discuss the accuracy and implications of your analysis and make recommendations to the client. Hand calculations validating that the FEM results are reasonable. To be completed by the project team manager: Short summary of each team member’s role and your reflection on how the group performed. Maximum number of pages is 20. State all assumptions and use credible references where required (no websites or course notes). Refer to the assignment 1 feedback document and don’t dare make any of those mistakes! |
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Requirements for the presentation
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The length of the video presentation should be no more than 5 minutes. Preferred video format is mp4. You must upload your completed video to CloudDeakin. You video should include: |
| o | Overview of the problem |
o Discussion of the model setup
o Discussion of results
o Recommendations to the client based on your analysis
If you have any questions, please ask sooner rather than later!
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