Forces Tension, Compression, shear, and Torsion

ForcesTension, Compression, shear, and TorsionMr. RuddleConstruction Technology

1Lesson OverviewIn this lesson, you will analyze the four forces that can potentially act upon structural objects: tension, compression, shear and torsion. The lesson will prepare you to be able to select appropriate materials and designs for different situations based on the types of forces that need to be accounted for.

Beginning course details and/or books/materials needed for a class/project.2ObjectivesAt the conclusion of this lesson, you will be expected to be able to:

1. Identify which forces are acting upon an object2. Identify ways to counteract forces that may potentially affect objects3. Analyze a design and determine a way to improve the way it handles forces.

A schedule design for optional periods of time/objectives. 3TensionPulling or Stretching force.

http://www.cdli.ca/courses/isys1205/unit03_org01_ilo01/images/u3s4l1-04.jpg

Objectives for instruction and expected results and/or skills developed from learning. 4CompressionPushing or Crushing force


Objectives for instruction and expected results and/or skills developed from learning. 5ShearForce applied parallel to the face of a material

http://www.cdli.ca/courses/isys1205/phidgets/unit03_org01_ilo01/images/u3s4l1-06.jpgObjectives for instruction and expected results and/or skills developed from learning. 6TorsionTwisting or Turning force


Relative vocabulary list. 7Forces as a Design ConsiderationWhen designing objects, is important to consider the forces that the object might experience.

Why?http://www.youtube.com/watch?v=j-zczJXSxnwA list of procedures and steps, or a lecture slide with media.8Counteracting Forces

http://media.techeblog.com/images/tunedmassdamper.jpghttp://www.midas.com/Portals/0/AutoEd_Images/16_Steer_Suspension_IMG2.pnghttp://www.giant-bicycles.com/images/technology_maestro.jpgAfter considering potential forces, it is important to counteract those forces within your design.

How are the forces being counteracted in the designs below?Example graph/chart.9VocabularyTension Pulling/stretching forceCompression Pushing/crushing forceTorsion Twisting/turning forceTuned Mass Damper A device mounted to a structure that is used to counteract movement caused by various forcesDesign Consideration Something that needs to be taken into account when designing an object

Conclusion to course, lecture, et al. 10AssessmentOn a sheet of paper, create four columns like you see below. Next, find 15 objects in this room that are experiences one of the four forces we discussed today and list them in the appropriate columns.Be prepared to share your findings!TensionCompressionTorsionShearConclusion to course, lecture, et al. 11Resources and PracticeVisit the following website and be prepared to discuss it tomorrow. http://www.diydoctor.org.uk/projects/forces.htm

Complete the Checking for Understanding sheet for tomorrow

An opportunity for questions and discussions.12

Forces Tension, Compression, shear, and Torsion

Documents

Transcript of Forces Tension, Compression, shear, and Torsion