Blake's Design of Mechanical Joints 2nd. Edition by Harold Josephs., Ronald L. Huston | 9781498766296 | 1498766293 | Holooly

Mechanical Engineering Design

Blake's Design of Mechanical Joints

61 SOLVED PROBLEMS

Question: 4.DS.16

Two different fastener tool manufacturers have submitted their tools to the Dorf fastening tool lab for testing. The tool engineers are interested in evaluating the time required to tighten the bolt on a given test bracket. Data is collected on run-down times (from snug to fully tightened) given in ...

Verified Answer:

Approach: 1.

H_{0} : \sigma ^{2}_{1}=\sigma ...

Question: 6.20

Consider again the dynamically loaded bracket of Example Analyses 18 and 19 and as shown again here in Figure a. As before, let the bracket and wall support by rigid. Let the dimensions of the bracket, the rivets, and the wall thickness be as follows: a = 6 in b = 18 in c = 6 in d = 12 in e = 5 in ...

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From the results of Example Analysis 37 we have th...

Question: 6.19

Review Example Analysis 18. In the Comment at the end of the example we observed that we were able to obtain the rivet stresses without needing to determine the rivet elongations. Instead, in finding the rivet stresses we simply used the results in Example Analysis 11 where the rivet elongations ...

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With the assumptions of bracket and support rigidi...

Question: 6.18

Consider again the bracket of Example Analysis 11 as shown in Figure a. As before, let the bracket be a relatively rigid “L-shape” member supported by rivets on its vertical side, and acting as a shelf on its horizontal portion. Assume further that the vertical support is rigid. Next, suppose a box ...

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Observe in Figure a, and in the problem statement,...

Question: 6.17

Review Example Analysis 16. Consider now a bracket with a supporting web as in Figure a. To explore the usefulness of the web in reducing cantilever support bending stress, let the dimensions of the web be 28 inches long and 12 inches high as in Figure b. Let the web thickness be 1/8 inch. a. ...

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a. Recall from elementary beam theory that the sec...

Question: 6.16

Consider yet again the bracket of the foregoing examples, and as shown again here in Figure a. Let the thickness h of the horizontal portion of the bracket be: 3/16 inch. Let the other dimensions and distances be the same as in Example Analysis 12. That is,a=2 in, b=12 in, c=4 in, d=8 in, e=4 in, ...

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The stress at Q is simply a bending, or flexural, ...

Question: 6.15

Review Example Analyses 12 and 14. Suppose that a maximum allowable shear stress τmax for the bracket rivets is 20,000 psi. Determine the corresponding maximum allowable safe weight load Wmax. ...

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From Example Analysis 14, Eq. (e), the maximum wei...

Question: 6.14

Review again Example Analyses 11 to 13. Let τmax be the maximum allowable shear stress in the rivets. Determine relations between the weight load W and τmax. Let the dimensions and distances be the same as in the foregoing example analyses and as shown again in Figure a. ...

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This problem is statically indeterminate: If we en...

Question: 6.13

Repeat Example Analysis 12 for the following data : a=0.05 m , b=0.3 , c=0.1 m , d=0.2 m e=0.1 m , h=4.75 mm , 2r=6 mm Repeat Example Analysis 12 for the following data : Find Wmax assuming the maximum allowable rivet tensile stress σmax is 170 MPa. ...

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Recall from Example Analysis 12 that the maximum r...

Question: 6.12

Review Example Analysis 11. Consider again the bracket of Figure a and as shown again here in Figure a. Let the dimensions/distances shown have the values: a=2 in, b=12 in, c=4 in, d=8 in e=4 in, h=3/16 in, 2r= 1/4 in Suppose the allowable rivet stress (the tensile stress) is 25,000 psi. ...

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Recall from Eqs. (k) and (Ρ) of the solution for E...

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