# Engineering

## ECMM107 - Mechanics of Materials (2010)

MODULE TITLE CREDIT VALUE Mechanics of Materials 15 ECMM107 Prof Christopher Smith (Coordinator), Dr Khurram Wadee
DURATION: TERM 1 2 3
DURATION: WEEKS
DESCRIPTION - summary of the module content
AIMS - intentions of the module
This module introduces more advanced aspects of theory of elasticity as applied to solid mechanics, providing a basis for study in Solid Mechanics, Computational Engineering and Materials. It then introduces and develops experimental stress analysis, techniques for global and localised strain and stress measurement, and data analysis. It applies these to study of fracture and failure behaviour of materials and in the application of analytical techniques to problems of fracture mechanics.
INTENDED LEARNING OUTCOMES (ILOs) (see assessment section below for how ILOs will be assessed)
SYLLABUS PLAN - summary of the structure and academic content of the module
Week 1. Mathematical concepts of Stress and Strain. Stress vector/tensor. Hooke's Law. 2nd rank tensors: representation, mathematical theory, notations. Week 2. Plane stress and plane strain. 2d Cartesian problems. Force balance equations for stress, boundary conditions, compatibility. Airy stress function. Simple solution. Week 3. 2d problems in polar co-ordinates. Solution via analytical and numerical techniques. Evaluation of strain from stress solution. Plane strain, governing equations in 2d including body forces. Week 4. Strain measurement basics. Physical methods and limitations. Electrical resistance strain gauges: fundamental theory, application, data acquisition and data analysis. Weeks 5 & 6. Ceramic and other strain gauges. principles and theory, applications and limitations. Optical methods incl. Photostress, Frozen stress, MoirÃ© interferometry. Correlation methods: theory, demonstration. Week 7. Yield and Strength Failure Criteria. Ductile materials, Tresca, von Mises. Week 8. Brittle materials. Inelastic deformation. Plasticity and hardening. Non hardening multi-axial plasticity. Week 9. Stress concentration factors. Fatigue and fracture. High cycle fatigue. Low cycle fatigue. Week 10. Linear elastic fracture mechanics.
LEARNING AND TEACHING
LEARNING ACTIVITIES AND TEACHING METHODS (given in hours of study time)
DETAILS OF LEARNING ACTIVITIES AND TEACHING METHODS
ASSESSMENT
FORMATIVE ASSESSMENT - for feedback and development purposes; does not count towards module grade
SUMMATIVE ASSESSMENT (% of credit)
 Coursework Written Exams 30 70
DETAILS OF SUMMATIVE ASSESSMENT
DETAILS OF RE-ASSESSMENT (where required by referral or deferral)
RE-ASSESSMENT NOTES
RESOURCES
INDICATIVE LEARNING RESOURCES - The following list is offered as an indication of the type & level of
information that you are expected to consult. Further guidance will be provided by the Module Convener