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Evolution of the Method of Optimum DesignSome Industrial
Some Approximations for Explicit Design
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actual load angular velocity approximation assume axes axial beam calculated Chapter characteristic impedance consider curvature curve defined depicted in figure derived design problems determined developed P.D.E. diameter dmax elastic error example exists factor of safety failure phenomenon fatigue failure feasible designs finite differences free body diagram functional requirements gear helical Hence ideal problem independent geometrical parameters limit equation load capability log-log log-log graph manufacturing material parameters maximum shearing stress mechanical element mechanical system method of optimum obtained optimum design study optimum material optimum value permissible values pinion pitch Poisson's ratio primary design equation principal normal stresses range ratio redundant specifications respect shearing stress theory shown in figure socket specified value spring steel strength of materials stress concentration factor stress increase factor subsidiary design equations surface Table tensile bar theory of elasticity Tmax tooth torque torsion bar torsion shaft typical variable variation versus yield strength