Biomedical Advanced and Computational Stress Analysis (UG)

Module aims

To explore advanced topics in mechanical drawing, stress analysis, and finite element simulation including nonlinear material models appropriate for biomedical applications in order for the student to obtain the ability to design and analyse for manufacture of biomedical and other devices.

In the end the student should have all the necessary tools and methods to be a stress analysis engineer in the biomedical / mechanical engineering industry

Learning outcomes

 Learning Outcomes - Knowledge and Understanding

  • define measures of stress and strain appropriate for a specific stress analysis problem.
  • describe and perform the appropriate failure analysis for a given problem
  • recognise the difference between small and large strain analysis and therefore use appropriately engineering or true stresses and strains.
  • recognise and apply appropriate material models (nonlinear over linear); recognise the implications.

Learning Outcomes - Intellectual Skills

  • analyse, evaluate and compare 2D & 3D stress and strain states in mechanical parts.
  • interpret 2D mechanical drawings and visualise into 3D objects.
  • formulate a simple, well-posed stress analysis problem using finite element analysis

Learning Outcomes - Practical Skills

  • Design mechanical parts for manufacturing.
  • Use of Finite Element Analysis to conduct stress analysis of parts.
  • Clear pathway on how to optimise the design in order to meet the design specification from a strength viewpoint.

Learning Outcomes - Transferable Skills

  • report writing; independent thinking and working
  • strong analytical, problem solving skills
  • evaluate and interpret data

Module syllabus

  • Mechanical drawing - cuts, views, dimensioning, drawing for manufacturing.
  • Recap on Solid Mechanics topics
  • Stress analysis of complex structures and machine elements (eg bolts).
  • Introduction to finite element analysis
  • Nonlinear material models (true stress and strain, plasticity, viscoelasticity, strain energy functions; plastics, rubbers, soft tissues)

The first two weeks will be on technical drawing.

The rest of the course will be primarily on finite element analysis, through which we will recap topics in solid mechanics and learn how to conduct stress analysis for any mechanical part, including machine elements (eg bolts)
From week 4 onwards we will drop the 2nd lecture and we will have a 2h slot in the computer room where we will do hands on finite element modelling.

Pre-requisites

BE2-HSDM: Solid Mechanics BE2-HEDP: Engineering Design Project BE2-HMATH2: Maths II

Teaching methods

Lectures: 10 hours
Study groups: 5 hours

Assessments

Written exam: 80% weighing, 4 questions, all compulsory. Formula sheet will be provided.

No type of previous exam answers or solutions will be available


Coursework:
●  Item 1:Problem sheet  (technical drawing) Weighting: 10 %
●  Item 2:Written report  Weighting: 10 %


Feedback : Feedback within 3 weeks for both the problem sheet and the written report. Immediate feedback in study groups, especially in technical drawing and in the computer room when doing finite element modelling.

Reading list

Module leaders

Dr Spyros Masouros