STRESS AND STRAIN

Specific Objectives
By the end of the sub-module unit, the trainee should be able to:
 * 1) define terms used in properties of materials
 * 2) calculation of stress and strain
 * 3) state Hooke’s law
 * 4) describe the stress – strain relationship

Content
-	plasticity
 * Definitions

-	elasticity

-	stress

-	modulus of elasticity

-	bulk modulus

-	yield modulus

-	stress
 * Calculations

-	strain


 * Stating Hooke’s law
 * Describing the stress-strain relationship
 * Sketching the stress-strain graph
 * Modulus of rigidity
 * Working stress and ultimate stress
 * Factor of safety

Specific Objectives
By the end of the sub-module unit, the trainee should be able to:
 * 1) Set the apparatus for stress, strain experiment
 * 2) Carry our experiment for stress and strain
 * 3) Carry out tensile test for ferrous metals
 * 4) Plot the stress strain graph
 * 5) Calculate stress and strain

Content

 * Apparatus
 * Experiment for stress/strain
 * Tabulate data
 * Stress/strain graph

Competences
Ability to:
 * 1) Carry our laboratory test on metals
 * 2) Compute stress/strain results
 * 3) Plot stress/strain graph
 * 4) Interpret the test results
 * 5) Calculate the stress/strain problems
 * 6) Sketch and table the stress strain graphs

Suggested Teaching/Learning activities

 * Demonstration
 * Class exercises

Suggested Learning Resources

 * Laboratory
 * Text books
 * Actual metals

Suggested Assessment Methods

 * Practical exercise
 * Written
 * Assignments