325-lec-5-gear stress (annotated)

325-lec-5-gear stress (annotated) - MECH 325 Gear Stress...

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MECH 325 Gear Stress Need photo MECH 325 2 Objectives By the end of this section, you should be able to: Analyze bending and contact stress failure of spur gears using AGMA standards Describe the operation of power screws and cite typical applications Describe thread geometry for common types of power screws MECH 325 3 Stress in Gears MECH 325 4 Stress Failures in Gears
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MECH 325 5 Lewis Bending Equation 2 6 t Wl Ft σ = Cantilever Beam Model W t t F l t WP FY = 2 3 Yx P = MECH 325 6 AGMA Bending Stress Equations t dm b ovs PKK WKKK F J = tN all F TR SY SKK = F S K K = Bending stress safety factor MECH 325 7 AGMA Contact Stress Equations f t m cP o v s p C K CW K K K dF I = , CN H c all H SZC = H H CT R S K K = Contact stress safety factor MECH 325 8 AGMA Empirical Factors C f = surface condition factor C H = hardness factor C p = elastic coefficient I = geometry factor J = geometry factor K B = rim thickness factor K o = overload factor K m = load distribution factor K R = reliability factor
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325-lec-5-gear stress (annotated) - MECH 325 Gear Stress...

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