Reference no: EM133125829
ME5525 Biomechanics and Biomaterials - Brunel University
Assessment - Finite Element Analysis
Learning outcome 1: Principles and applications of Finite Element Analysis.
Learning outcome 2: FEA in modelling trauma treatment devices.
Learning outcome 3: Employment, interpretation and appraisal of problem solutions from the evaluation and simplification of the actual problem to the definition of the model and the validation of the results.
Learning outcome 4: Technical report writing, time management and effective use of resources, hands-on experience with the use of engineering software.
Learning outcome 5: Technical presentation skills
Students will be required to:
a) Attend FEA laboratory sessions to understand how to apply boundary conditions, mesh a model using custom defined meshing parameters, investigate mesh convergence and stress concentrations.
b) Submit a report, which meets objectives, format and deadline as specified in this pro- forma, the attached sheet and the template.
c) Work must be conducted using Ansys FEA package.
A full outline of the grade boundaries is presented on the next page.
The student will be assessed through submission of a five-page technical report.
Introduction
To introduce the problem and explain why FEA can be used for analysis of medical devices.
Methodology
To outline the steps undertaken when conducting the FEA analysis. To describe and justify the boundary conditions, choice of mesh and modelling methodology.
Results and Discussion (this may be written as a single section or you may separate Results and
Discussion)
To show results from the expected FEA package, Ansys Workbench. To undertake a critical analysis of the presented results. To give the results engineering context by referring back to literature discussed earlier in the document.
Materials and Redesign
To show an understanding of the materials used in prosthetic fabrication and discuss whether the current material optimal. To show redesign of the part if it were to be used in a real-life situation.
Conclusion
To outline the main findings from the work.
Presentation
The ability to summarise work will be evaluated via a short report; the clarity of presentation, writing, figures and tables will be important. All graphs, figures and tables must be labelled appropriately and referred to within the text. Any numerical figure discussed in the text must be supplied with the appropriate unit.
Report Structure -
Introduction (10%) ½ page
Methodology (25%) 1 pages
Results and Discussion (30%) 3 pages
Materials and Redesign (20%) 2 pages
Conclusion (10%) ½ page
Formatting/references/grammar (5%)
Total 7 Pages
References
References are expected and must be inserted in the appropriate manner.
Overview
The aim of the assignment is to show an understanding of 3D finite element analysis (FEA). You will undertake FEA on a prosthetic foot Fig. 1. A simple model replicating the prosthetic foot is supplied for you as a file that can be downloaded from BlackBoard (prosthetic.scdoc), dimensions are shown in the Appendix. The foot should be able to withstand a load of 1500 N if a person is in a standing position. You should specify how the part is restrained in the model. You may model the part using 3D elements or as a surface.
Figure 1: Prosthetic foot
The material to be used for this study is an aluminium alloy, this has a Young's modulus of 71 GPa, Poisson's ratio of 0.33, density of 2770 kg/m3 tensile and compressive yield strength of 280 MPa.
1. Plot the results of deformation and stress on two separate convergence graphs.
a. No more than three element types should be shown.
2. Find the optimal element and discuss.
3. Find the computed factor of safety and undertake a life cycle analysis on the part.
4. If this prosthesis were to be used in a real-life situation, are there any design alterations you would make to the part?
Attachment:- Biomechanics and Biomaterials.rar