Assignment 2Finite Element Method in Computer Simulation

Introduction

Many computer-aided engineering packages use finite element techniques in order to simulate engineering problems. Particularly common are stress analysis, thermal analysis and Computational Fluid Dynamics solvers. This assignment requires an investigation to be carried out into the method using common Finite Element Analysis software.

Tasks

1. Describe, in detail, the basic principle of finite element analysis (15 marks)

2. Describe how FEM software might be used in industry. Include some of the issues regarding the use of FEA,in particular consider the issue of appropriate modelling and analysis solver ‘run time’. (15 marks)

3. Use Ansys Workbench or (APDL) to analyse a problem. (60 marks)

• Model a component of your choice – The component should be something that exists. As an example, the component could be a car suspension member, a bicycle handlebar stem or a wall shelf bracket. Make the initial component simple (remove any fillet radii, lightening pockets etc.).
• Determine realistic loadings and constraints for the component and use Cosmos to analyse the performance of the component.
• Use validation methods to show your confidence in your results
• Show mesh considerations
• Use FEA to improve the performance of the component. You should look to reduce stress concentrations, improve stiffness and strength to weight ratio.
• Identify the improvements made to the component using graphical and numerical evidence produced with the post-processor.

4. Critically appraise Ansys as a piece of FEA software. Identify strengths and weaknesses of the software. Describe your experiences with the software. (10 marks)

Total 100 marks. This assignment contributes 40% of the total marks for module MP3680

 
Assignment 2 Mark Sheet

Finite Element Methods in Computer Simulation

Part 1

FE principles described clearly covering meshing, application of boundary conditions, solver and post-processing
/15

 
Part 2

Examples given of how FEA might be used in industry. Issues covered such as ‘run time’ considerations, application of realistic boundary conditions etc.
/15

Part 3

Suitable choice and appropriate modelling of components for analysis
/10

Application of realistic boundary conditions (loads and restraints)
/20

Development of component to improve its performance based upon analysis results
/30

Part 4

Critical appraisal including strengths and weaknesses of Ansys software
/10

 
Total
/100