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Ch. 12

Ch. 12. 3-4 students per table Workbook & Textbook Pencil / Pen Start when quiet. Term # 1. Term # 1 Health and Safety Test Woodshop Mapping Technical Drawing Homework Bonus Noise Maker. Sec. 4 Recupe. Thursday @ 3-4:30 Day 4 @ Lunch. Ch. 12: Materials.

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Ch. 12

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  1. Ch. 12 • 3-4 students per table • Workbook & Textbook • Pencil / Pen • Start when quiet

  2. Term # 1 Term # 1 • Health and Safety Test • Woodshop Mapping • Technical Drawing • Homework Bonus • Noise Maker

  3. Sec. 4 Recupe Thursday @ 3-4:30 Day 4 @ Lunch

  4. Ch. 12: Materials • Constraints & Deformations • Properties • Degradation and Protection

  5. Text / Work Books Text Book - p. 386 Work Book - p. 197 • Copy the following definitions

  6. A CONSTRAINT • Describes the effect of external forces on a material (p. 387)

  7. Compression • A material subjected to forces that tend to crush it is undergoing compression (p. 387)

  8. Example of Compression

  9. Tension • A material subjected to forces that tend to stretch it is undergoing tension.

  10. Example of Tension

  11. Torsion • A material subjected to forces that tend to twist it in undergoing torsion.

  12. Deflection (bending) • A material subjected to forces that tend to bend it is undergoing deflection.

  13. Examples of Bending

  14. Shearing • A material subjected to forces that tend to cut it is undergoing shearing.

  15. Multiple Constraints

  16. Deformations

  17. 3 Types of Deformation

  18. Elastic - p. 387 • The constraint leads to temporary change in the shape or dimensions of the material. • When the constraint is removed, the material returns to its original form.

  19. Plastic • The constraint leads to a permanent change in the shape or dimensions of the material. Even when the constraint is removed, the material remains deformed.

  20. Fracture • The constraint is so intense that the material breaks.

  21. Homework • Work Book - p.197-198

  22. Earphone: Part 1 Earphone Deconstruction Links I.D

  23. Earphone Deconstruction Find Partner Get Earphone, Screw Driver & Ruler Deconstruct & Measure ALL parts Document dimensions on hand-out

  24. Links I.D. Read instructions Turn to pg. in Text book Complete hand-out Hand-in once complete

  25. Noise Maker Bonus Term 2

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