7.(A). A steel bar ABCD consists of three sections: AB is of 20mm diameter and 200mm long, BC is 25 mm square and 400 mm long, and CD is of 12 mm diameter and200mm long. The bar is subjected to an axial compressive load which induces a stressof 30 MN/m on the largest cross-section. Determine the total decrease in the length ofthe bar when the load is applied. For steel E = 210GN/m?.[0.272 mm.]8. Figure (19) shows a special spanner used to tighten screwed components. A torque isapplied at the tommy -bar and is transmitted to the pins which engage into holeslocated into the end of a screwed component.(a) Using the data given in Figure (19) calculate:(i) the diameter D of the shank if the shear stress is not to exceed 50N/mm',(ii) the stress due to bending in the tommy-bar,(iii) the shear stress in the pins.[9.14mm; 254.6 MN/m², 39.8 MN/m²]SON force opplied ot a dstonceof 25 mm trom both ends oftommy bor

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7.(A). A steel bar ABCD consists of three sections: AB is of 20mm diameter and 200 mm long, BC is 25 mm square and 400 mm long, and CD is of 12 mm diameter and 200mm long. The bar is subjected to an axial compressive load which induces a stress of 30 MN/m on the largest cross-section. Determine the total decrease in the length of the bar when the load is applied. For steel E = 210GN/m². %3! [0.272 mm.]

7.(A). A steel bar ABCD consists of three sections: AB is of 20mm diameter and 200 mm long, BC is 25 mm square and 400 mm long, and CD is of 12 mm diameter and 200mm long. The bar is subjected to an axial compressive load which induces a stress of 30 MN/m on the largest cross-section. Determine the total decrease in the length of the bar when the load is applied. For steel E = 210GN/m². %3! [0.272 mm.]

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.3.21P: A slightly tapered bar AB of solid circular crass section and length L is supported at end B and...

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A slightly tapered bar AB of solid circular crass section and length L is supported at end B and subjected to a tensile load P at the free end A. The diameters of the bar at ends A and B are dAand dB. respectively. Determine the length of the bar if the elongation of the bar due to the load P = 45 kips is 0.02 in. Assume that E = 10,400 ksi.
. (A). A bar ABCD consists of three sections: AB is 25 mm square and 50 mm long, BC is of 20 mm diameter and 40 mm long and CD is of 12 mm diameter and 50 mm long. Determine the stress set up in each section of the bar when it is subjected to an axial the bar material, E = 210GN/m?. tensile load of 20 kN. What will be the total extension of the bar under this load? For [32.63.7, 176.8 MN/m2, 0.062mm]
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