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1.10 Figure 1.24 shows a special spanner used to tighten screwed components. A torque is applied at the tommy- bar and is transmitted to the pins which engage into holes located into the end of a screwed component. (a) Using the data given in Fig. 1.24 calculate: (i) the diameter D of the shank if the shear stress is not to exceed 50 N/mm², (ii) the stress due to bending in the tommy-bar, (iii) the shear stress in the pins. (b) Why is the tommy-bar a preferred method of applying the torque? 26 [C.G.] [9.14 mm; 254.6 MN/m²; 39.8 MN/m².] Mechanics of Materials 50N force applied at a distance of 25 mm from both ends of tommy bar Fig. 1.24. 5

1.10 Figure 1.24 shows a special spanner used to tighten screwed components. A torque is applied at the tommy- bar and is transmitted to the pins which engage into holes located into the end of a screwed component. (a) Using the data given in Fig. 1.24 calculate: (i) the diameter D of the shank if the shear stress is not to exceed 50 N/mm², (ii) the stress due to bending in the tommy-bar, (iii) the shear stress in the pins. (b) Why is the tommy-bar a preferred method of applying the torque? 26 [C.G.] [9.14 mm; 254.6 MN/m²; 39.8 MN/m².] Mechanics of Materials 50N force applied at a distance of 25 mm from both ends of tommy bar Fig. 1.24. 5

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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1.10 Figure 1.24 shows a special spanner used to tighten screwed components. A torque is applied at the tommy- bar and is transmitted to the pins which engage into holes located into the end of a screwed component. (a) Using the data given in Fig. 1.24 calculate: (i) the diameter D of the shank if the shear stress is not to exceed 50 N/mm², (ii) the stress due to bending in the tommy-bar, (iii) the shear stress in the pins. (b) Why is the tommy-bar a preferred method of applying the torque? 26 26 5 [C.G.] [9.14 mm; 254.6 MN/m²; 39.8 MN/m².] Mechanics of Materials 50N force applied at a distance of 25 mm from both ends of tommy bar Q Fig. 1.24. 05 100
Transcribed Image Text:1.10 Figure 1.24 shows a special spanner used to tighten screwed components. A torque is applied at the tommy- bar and is transmitted to the pins which engage into holes located into the end of a screwed component. (a) Using the data given in Fig. 1.24 calculate: (i) the diameter D of the shank if the shear stress is not to exceed 50 N/mm², (ii) the stress due to bending in the tommy-bar, (iii) the shear stress in the pins. (b) Why is the tommy-bar a preferred method of applying the torque? 26 26 5 [C.G.] [9.14 mm; 254.6 MN/m²; 39.8 MN/m².] Mechanics of Materials 50N force applied at a distance of 25 mm from both ends of tommy bar Q Fig. 1.24. 05 100
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