3M03 – Mechanical Behaviour of Materials

Course Information 2016-2017

Instructor:
Oleg Rubel
Room: JHE 359
Tel: +1-905-525-9140, ext. 24094
E-Mail: rubelo@mcmaster.ca
URL: http://olegrubel.mcmaster.ca

 

Teaching Assistants:

Name
Demo Labs Supervised
Email
TBD
TBD
TBD
TBD

Course description
This course will examine how the microstructure of a material determines its mechanical
behaviour. The topics covered will include elastic and plastic deformation, creep, fatigue
and fracture of engineering materials. Materials selection will also be discussed.

Learning Outcomes
– Gain practical experience in measurement and quantification of mechanical properties.
– Understand the physical and microstructure basis of mechanical properties.
– Become familiar with failure mechanisms of structural materials.
– Ability to predict the useful lifetime of a material under specific load conditions.
– Knowledge of how to incorporate material strength limitations into engineering design.
Course structure
12 weeks: lectures 3 hrs/week, 4 lab demonstration sessions

Module 1 (week 1-3): Elasticity
– stress and strain
– Hooke’s law
– nature and types of chemical bonding
– atomic structure of solids
– microscopic insight to elasticity
– modulus limited design
– Demonstration 1: Elastic modulus of composite materials

Module 2 (week 4-6): Plasticity

– tensile testing
– perfect strength, dislocations, yielding
– mechanics of plastic flow
– strengthening mechanisms
– yielding under combined stress
– yield-limited design
– Demonstration 2: Effect of microstructure on the strength of an aluminum alloy

Module 3 (week 7-8): Fracture mechanics

– energetics of fracture growth
– plasticity at the fracture tip
– measurement of fracture toughness
– damage tolerance design
– elements of fractography
– Demonstration 3: Measuring the toughness of low carbon steels

Module 4 (week 9-10): Fatigue

– low- and high-cycle fatigue
– laboratory testing in fatigue
– residual stress, surface and environmental effects
– fatigue of cracked components
– designing out fatigue failure

Module 5 (week 11-12): Creep
– stress-strain-time relationship
– creep testing
– physical mechanism of creep
– diffusion
– creep-resistant materials
– Demonstration 4: Creep and high temperature deformation of aluminium

Evaluation:

Assignments 15%
Lab Demonstrations 20%
Midterm Exam 25%
Final Exam 40%

Prerequisites and relevance to other courses:
MATLS 1M03 “Structure and Properties of Materials” AND (ENGINEER 2P04 “Engineering Mechanics A” OR registration in level 4 or above CIVENG OR registration in level 3 or above mechanical engineering).

Recommended texts:
– Thomas H. Courtney, Mechanical Behavior of Materials, 2nd Edition (Waveland Press, 2000). ISBN: 978-1-57766-425-3