Stress and Strain Fundamentals - Mr David Jackson - Engineering Studies Teacher - 321 V1
Engineering Studies – P3 Braking Systems – Mechanical Analysis
This topic covers the definition and relevance of the engineering terms ‘stress’ and ‘strain’.
Methods of determining stress and strain values are described and the interpretation of the data explained.
Key Concepts
- Tension and compression forces
- Types of stress
- Defining strain
- Load /extension and stress/strain graphs
Discussion Questions
- Define stress and list the common types of stress.
- Explain the units used in stress values.
- Explain the difference between a load/extension graph and a stress/strain graph.
- Describe the procedure of the test being performed that creates a load/extension diagram.
- Outline how material properties can be identified on the graph produced by a tensometer – strength, elasticity, ductility, toughness and stiffness.
- Outline how a stress/strain graph varies for a range of engineering materials – ceramics, metals or polymers.
Downloads
321 Stress Strain Fundamentals -DRv1.0
Stress and Stain Discussion question responses - contributed by John Gibson
Solving Mechanical Calculations
Resources contributes by Steve Cavanagh
Head Teacher Technological and Applied Studies (TAS)
EAST HILLS BOYS HIGH SCHOOL
Videos
Stress and Strain Fundamentals - Mr David Jackson - Engineering Studies Teacher - 321 V1
Stress Stain Introduction - Mr David Jackson - Engineering Studies Teacher - 321 V3
Force Extension Introduction - Mr David Jackson - Engineering Studies Teacher - 321 V2
Reading a Force Extension Diagram -Example Question. Mr David Jackson - Engineering Studies Teacher - 321 V4
Stress and Strain - The Efficient Engineer - YouTube
Moment of Inertia - EXTENSION content. All students would benefit from the first chapter of this video. The ES syllabus states that the value of the second moment of area will be provided, not calculated.
The Efficient Engineer
True Stress - the Efficient Engineer series
Links
Elasticity of Solids
Describe the importance of understanding solid mechanics during device design.
Calculate stress, strain and modulus of elasticity.
Explain how engineers measure and calculate elastic material properties such as elastic modulus.
Explain a typical engineering stress-strain diagram of an elastic material and its important features.
