###### Machine Design: An Integrated Approach

108 SOLVED PROBLEMS

Question: 6.CS.6

## Redesign of a Failed Laybar for a Water-Jet Power Loom Problem The laybars in a number of water-jet looms have begun to fail in fatigue. The owner of the weaving works had increased the speed of the looms to boost production. The original design of a painted steel laybar had lasted with no failures ...

See Figures 6-50 to 6-56 and Table 6-13 (p. 398). ...
Question: 15.CS.8D

## Design of the Headbolts for an Air Compressor Problem Design a set of cap screws to attach the head to the cylinder in Figure 9-1 based on the loads defined in Case Study 8A (p. 526). Given The compressor bore is 3.125-in diameter. The dynamic force acting on the head fluctuates from 0 to 1 000 lb ...

See Figures 9-1 and 9-2. 1    Choose a trial diame...
Question: 14.CS.10C

## Design of a Return Spring for a Cam-Follower Arm Problem Design an extension spring for the cam-follower arm in Figure 14-36 based on the loadings defined in Case Study 10A (p. 532). Given The spring rate is 25 lb/in with a preload of 25 lb. The spring’s dynamic deflection is 1.5 in.Assumptions The ...

See Figure 14-36. 1    Assume an 0.177-in trial wi...
Question: 4.CS.2B

## Crimping-Tool Stress and Deflection Analysis Problem Determine the stresses and deflections at critical points in the crimping tool shown in Figures 3-3 (repeated here) and 4-49. Given The geometry and loading are known from Case Study 2A on p. 84. The thickness of link 1 is 0.313 in, of links 2 ...

See Figures 3-3, and 4-49 to 4-51. 1    Link 3 is ...
Question: 3.CS.5A

## Fourbar Linkage Loading Analysis Problem: Determine the theoretical rigid-body forces acting in two dimensions on the fourbar linkage shown in Figure 3-11. Given: The linkage geometry, masses, and mass moments of inertia are known and the linkage is driven at up to 120 rpm by a speed-controlled ...

See Figures 3-11 through 3-13 and Table 3-6. 1    ...
Question: 8.4

## Boundary Conditions Between a Pin and Hole Problem: An overhung beam is supported on two pins in bearings. Determine a suitable boundary condition scenario for its analysis and estimate its maximum deflection, maximum stress, and spring rate at the load point. Given: The beam dimensions in Figure ...

1    First solve the beam by classical closed-form...
Question: 5.CS.2C

## Crimping Tool Failure Analysis Problem Determine the factors of safety at critical points in the crimping tool shown in Figures 3-3 (repeated on next page) and 5-23. Given The stresses are known from Case Study 2B on p. 209. All material is AISI 1095 steel Q & T @ 800 °F with Sy = 112 kpsi ...

See Figures 3-3 and 5-23, and files CASE2C-1 and C...
Question: 14.5

## Design of a Helical Extension Spring for Cyclic Loading Problem Design an extension spring for a dynamic load over a given deflection. Given The spring must give a minimum force of 50 lb and a maximum force of 85 lb over a dynamic deflection of 0.50 in. The forcing frequency is 500 rpm. An infinite ...

See Figure 14-24 (p. 828) and Table 14-14 (pp. 829...
Question: 5.CS.1C