Page 535 - Shigley's Mechanical Engineering Design

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Welding, Bonding, and the Design of Permanent Joints 509

F
h
Problems 9–17 to 9–20
d
b
c

9–21 to The figure shows a weldment just like that for Probs. 9–17 to 9–20 except there are four welds
9–24 instead of two. Find the safe bending force F if the allowable shear stress in the welds is τ allow .

Problem
Number b c d h allow

9–21 50 mm 150 mm 50 mm 5 mm 140 MPa
9–22 2 in 6 in 2 in 5 in 25 kpsi
16
9–23 50 mm 150 mm 30 mm 5 mm 140 MPa
9–24 4 in 6 in 2 in 5 in 25 kpsi
16

F
h
Problems 9–21 to 9–24
d
b
c

9–25 to The weldment shown in the figure is subjected to an alternating force F. The hot-rolled steel bar
9–28 has a thickness h and is of AISI 1010 steel. The vertical support is likewise AISI 1010 HR steel.
The electrode is given in the table below. Estimate the fatigue load F the bar will carry if three
fillet welds are used.

Problem
Number b d h Electrode
9–25 50 mm 50 mm 5 mm E6010
9–26 2 in 2 in 5 in E6010
16
9–27 50 mm 30 mm 5 mm E7010
9–28 4 in 2 in 5 in E7010
16

h
h

Problems 9–25 to 9–28 d
F
b