Quiz+2+Solution - stress and strain(which is the slope of...

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DMC Quiz 2 Solution M.A.Bitetto The following definitions come from your current textbook, and the Mechanics of Materials text from last term. Either is acceptable. Turning in Quiz 2 automatically garners 25 points. Each definition is worth 25 points. From R.C. Juvinall and K.M. Marshek, “Materials: 3.2 The Static Tensile Test ‘Engineering’ Stress -Strain Relationships,” in Fundamentals of Machine Component Design , Fourth Ed., John Wiley & Sons, 2006, p. 81. The yield strength is the value of stress at which significant plastic yielding first occurs. The elastic limit is the highest stress the material can withstand and still return exactly to its original length when unloaded. The modulus of elasticity , or Young’s modulus, E, is the constant of proportionality between
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Unformatted text preview: stress and strain (which is the slope of the curve between the origin and the proportional limit). From T.A. Philpot, “Mechanical Properties of Materials: 3.2 The Stress-Strain Diagram,” in Mechanics of Materials: An Integrated Learning System , John Wiley & Sons, 2008, pp. 46-49. The yield strength is defined as the stress that will induce a specified permanent set (i.e. plastic deformation) in the material, usually 0.05% or 0.2%. The elastic limit is the largest stress that a material can withstand without any measurable permanent strain remaining after complete release of the stress. The modulus of elasticity is the ratio between normal stress and normal strain, which is the slope of the initial, straight-line portion of the stress-strain diagram....
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