Properties of Materials · SHS2 Manufacturing…

Lesson notes

Learning Objectives

Indicator: 2.1.2.LI.1 - Explain loading, stress and strain of materials for manufacturing.

By the end of the lesson, learners can:

Identify and describe the four types of loading (axial, bending, torsional, and shear) using examples from everyday manufacturing and construction settings.
Define loading, stress, and strain in their own words and distinguish between compressive and tensile forces.
Perform simple axial loading tests on readily available materials (e.g., rubber bands, mild steel wire, chalk) and observe the resulting deformation.
Calculate stress (force ÷ area) and strain (change in length ÷ original length) for a given material sample using measured values.
Explain how stress and strain measurements from loading tests help manufacturers deduce the properties of materials before, during, and after production.

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

Curriculum details

Strand: Manufacturing Materials and Technologies (Strand 1)
Sub-strand: Properties of Materials (1.2)
Content standard: 2.1.2.CS.1 - Demonstrate knowledge and understanding of loading, stress and strain of materials. 2.1.2.LO.1 Explain and measure the tensile properties of materials.
Indicator: 2.1.2.LI.1 - Explain loading, stress and strain of materials for manufacturing.
Suggested placement: Semester 1, Week 9 (Week 9 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 57

Exemplars (from the NaCCA curriculum)

Experiential Learning: Place learners into mixed-ability groups and let each group perform axial loading (compression and tension), bending loading, torsional loading and shear loading using readily available materials.
Talk for Learning: Learners explain loading, stress and strain from the loading tests performed earlier. Guide learners to understand that stress and strain are used to deduce the properties of materials during or after manufacturing.
Teaching and Learning Materials:
- * Textbooks * Laboratory
- * Strain gauge * Laboratory equipment for performing stress-strain tests
Assessment (2.1.2.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.