Question

A hole is to be drilled in the plate at A. The diameters of the bits available to drill the hole range from 1212 to 112112 in. in 1414 -in. increments. The allowable stress in the plate is 21 ksi. Use Figure 2.52 (a) and Figure 2.52 (b).

d ty=in. 4분 in. A in P

Determine the diameter d of the largest bit that can be used if the allowable load P at the hole is to exceed that at the fillets.

The diameter d of the largest bit that can be used is ____ in.

Answer 1

= D d => 1.5 4.6875 3-125 0.375 0.12 3.125 R=2010 Apin =) (3.125 0.5) = 1.5625 ina 6 max ) K Pall - sall Ann Pall = 1.5625821 2-10 (150625 try At hole Anot =) (0-2 rot 6 marc = Rp call Anet pall =) Anot call D = 4.6875 inch, t=0.5 inch, roll-alks i I Hole Damata r Loosinch 0.25 10.75 inch 100375 1 inch 005 1.25ind 0625 sin oon d = 8-21 4.1875 3.9375 3.6875 3.4375 3.1875 2110 IR Ant 0.107 288 2.0938. 0016 2.88 1-968 0.213 2.49 1.843 ) 0.267 2041 7075 1 0.32 2341 1.543

For 16.40 kipy. oor Pall & Apat call = k 0.75 pall a 16.024. Fol - For Itach Largest Tall s hole 1805. for hall 718.625 ол 2 и