http://www.teachengineering.org/view_lesson.php?url=collection/cub_/lessons/cub_mechanics/cub_mechanics_lesson07.xmllessontext/xmlIntegrated Teaching and Learning Program, mechanicsareacompressive stresscompressiondeformationelastic deformationfatigue strengthforcematerial propertiesplastic deformationstrength of materialsstressstraintensile stresstensionultimate tensile strengthyield strengthStressCompressive stressTensile stressStrainElastic deformationPlastic deformationYield strengthUltimate tensile strengthFatigue strength

Students are introduced to the concepts of stress and strain with examples that illustrate the characteristics and importance of these forces in our everyday lives. They explore the factors that affect stress, why engineers need to know about it, and the ways engineers describe the strength of materials. In an associated literacy activity, while learning about the stages of group formation, group dynamics and team member roles, students discover how collective action can alleviate personal feelings of stress and tension.

Engineers use their understanding of forces, stress, strain and material properties to create safe designs for structures, equipment and products. Analysis of strength of materials (yield strength, ultimate tensile strength and fatigue strength) figures into the selection of materials used to create items such as chairs, appliances, toys, bicycles, medical joint replacements, rock climbing rope, door handles, roof shingles, water slides, diving boards, bridges and playground equipment, to name a few. Recognize that engineers use their understanding of forces, stress, strain and material properties to create safe designs for structures, equipment and products Understand how force and area affect stress. Distinguish between compression and tension. Understand several properties of materials 50TeachEngineering.orgBen HeavnerChris YakackiMalinda Schaefer ZarskeDenise Carlson Shigley and Mischke. Mechanical Engineering Design. New York, NY: McGraw-Hill, 2001. S11416DDInternational_Technology_Education_Association-ITEA_STL_StandardsTechnologyF. Knowledge gained from other fields of study has a direct effect on the development of technological products and systems.68S11424D2ColoradoSciencea. Predict and evaluate the movement of an object by examining the forces applied to it 88S11425BDColoradoScienceb. Describe methods and equipment used to explore the solar system and beyond 88S11426CFColoradoMathb. Use representations of linear functions to analyze situations and solve problems 88S1142658ColoradoMatha. Add, subtract, multiply and divide rational numbers including integers, positive and negative fractions and decimals 88United StatesCopyright 2012 - Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulderhttp://www.teachengineering.org/policy_ipp.phphttp://www.teachengineering.org/2010-08-238Teacher