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6 - Plastic change in shape of material is not reversible...

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Two other types of deformation/mechanical behavior Creep- slow deformation that occurs at stresses well below the fracture strength. Deformation can often be quite large. Fatigue-deformation and fracture (failure) due to cyclic deformation at strong levels much less than the fracture stem. Often due to crack growth Elastic- deformation is reversible
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Unformatted text preview: Plastic- change in shape of material is not reversible and remains after deformation Stiffness= load/deformation Stress, strain, stiffness Stress=load/cross sectional area Force= mass x acceleration A Newton is a unit of force and is a kg m/sec squared A pascal is a unit of stress...
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