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Objectives

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Objectives

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    2. Stress Intensity of Force Stress = ____ /____

    3. Types of Stress Normal : load perpendicular to area

    7. Types of Strain Normal : deformation in the the direction of length

    8. Transverse Strain Materials tend to expand/contract in the directions perpendicular to the load application. Poisson�s Ratio ? = - _____________ axial strain

    9. Why Poisson�s Ratio ?

    13. Relating Stress and Strain Called a �Constitutive Model� Simple Linear Model: �Hooke�s Law�

    17. Real Material Behavior -Hookean to a limiting strain -Proportional limit : Deviation from linear -After PL *Linear *Flat *Non linear

    18. Tensile Test

    21. Slope of Recovery Line

    22. Unload/Reload

    23. Yield Strength from S-e Curve

    24. Everything Together

    25. What is Viscoelastic Deformation?

    26. Creep Test Viscoelasticity

    27. Deformation Types Name Math Model Time Dependency Type Elastic Linear/Nonlinear None Recoverable Plastic Linear/Nonlinear None Nonrecoverable Viscoelastic Linear/Nonlinear Strong Recoverable Viscoplastic Nonlinear Strong Nonrecoverable

    28. Representative Modulii

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