Transcription of General Engineering Principles I.
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General Engineering Principles I.
General Engineering Principles ISealed Source & Device WorkshopGeneral Engineering Principles I: 1 General Engineering Principles IForces:Tensile and Compressive: Tensile (Tension) - pulling apart Compressive (Compression) - pushing together Forces may be direct, or may be caused by changes in pressure, temperature, or combined : Force perpendicular to the primary Source & Device WorkshopGeneral Engineering Principles I: 2 General Engineering Principles IStrength: Stress = Force/Area (psi or Pa) Strain = Elongation under stress =change in length/original length (in /in )length/original length ( ) Ultimate Strength: maximum stress sustained without breaking - exceed this limit and the material will break. Yield Strength: maximum stress sustained without permanent deformation - the material will stretch and come back to its original Source & Device WorkshopGeneral Engineering Principles I: 3 General Engineering Principles IStress vs.
• Plate - is a rolled product more than 3 0 mmis a rolled product more than 3.0 mm thick, supplied flat as in the case of a sheet. It may be hot rolled only, but in a thinner gauge it can also be offered cold-rolled, when it will have better finish and closer tolerance than hot-rolled equivalent.
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