A course pitch metric grade 9.8 bolt with a hexagonal nut assembly is used to keep twomachined parts of a machine together as shown in the figure below with a maximum external loadbolt and bottom member are made of steel, while the top plate is made of wrought aluminum alloyper bolt and portion of member, P = 20 kN. The major diameter of the bolt is 14 mm. Both the(Al 2024-0). Assume the bolts are reusable. Use Est=200 GPa and EAL = 62 GPaa) Determine the stiffnesses of the bolt and members and fraction of load acting on the bolt. C.b) All the static and fatigue factors of safety using Gerber theory?Aluminum30Carbon steel25

Step 1: Step 2: Step 3: Step 4:

Answered: A course pitch metric grade 9.8 bolt…

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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A factor of safety of 2.5 is used for the bolts in the assembly below. The ultimate shear stress of the magnesium alloy bolts is 20.0ksi. What should be the diameter of the bolts? 10 kip 5 kip 5 kip Diameter = in
Q1 A single-square thread power screw is to raise a load of 100KN. The screw has a major diameter of 42 mm and a pitch of 6 mm. The nut for the screw transfers the load as shown in the F/2 F/2 figure right. The power screw is made of carbon steel having Sy=350MPA and Sut= 500MPa. The nut is to be made of ASTM 25 gray cast iron having S,=220MPA and Suc=670MPA. The friction on the screw threads is 0.15 and the friction on the nut is ignored. Calculate; i) ii) iii) iv) Raising and lowering torques Efficiency for raising the load Check for the self-locking condition Nut height (h) when considering the failures due to direct shear at the root of the thread and bearing stress failure on nut. Take the factor of safety as 3. Critical load when the power screw is at maximum height of 850mm. v)
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Qestion-1: A 9/16 in UNF bolt is subjected to a load P = 60 kip in a tension joint as shown in Figure. The bolt is SAE grade 5 and lubricated. The initial bolt tension (F) = 35 kip. The bolt and joint stiffnesses are k, = 6.5 and km 10.8 Mlbf/in Note: Use the related tables, formulas and concepts to answer following question (a) Formulate to determine the preload and service load stresses in the bolt. (b) Solve to find the torque necessary to develop the preload. (c) Identify if the bolt will fail or no under preload and service load stresses (Calculated in part a) by comparing with the SAE minimum proof strength of the bolt. (d) Can you identify; with given input data, tables and formulas that bolt is self-locking? Table 8-9 SAE Specifications for Steel Bolts Size SAE Range Grade Inclusive, No. in +14 1 2 4 5 5.2 7 8 TI I LI I I I +-14 8.2 -1 Minimum Proof Strength," kpsi 33 55 33 65 85 74 85 105 120 120 Table 8-2 Diameters and Area of Unified Screw Threads Size Designation 0 1 2 3 4…
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For the frame shown in Fig. 6-24a, draw the free-body diagrams of (a) the entire frame including the pulleys and cords, (b) the frame without the pulleys and cords, and (c) each of the pulleys. 3E Fx=0 +9 E fy=o 1. FIMD RXAS AT A$D Fing FoRLE componeAB 2. Ge Pits oF POLLEYS EM=0 Cx C By E Ay T. Ay AauLE OF RESOUTAT AT B, C &A 75 lb SKETCH RESULTALT (a) Fueo Manat AT BASE ア(y 7516 OF CULUneCE radius of the pulley at B linch Yadius of the Pulley at c a7s inch 75 lbs 7516 () Distance BE 7inch Distance EA 4.5 inch Distance AV : 3.sinch Ay 6) 7516 マへ

The bracket shown in the figure is bolted a ceiling beam to support a fluctuating vertical load imposed on it. The bolts are -in coarse-thread SAE grade 8, tightened to recommended preload for nonpermanent assembly. The stiffnesses have already been computed and are kp=4 Mlb/in and km = 16 Mlb/in. Laad line F. Steady stress (a) Assuming that the bolts, rather than the welds, govern the strength of this design, determine the safe repeated load that can be imposed on this assembly using the Goodman criterion with the load line in the Figure and a fatigue design factor of 2. (b) Compute the static load factors based on the load found in part (a). (ie. Yielding factor of safety, Load factor of safety and factor against joint separation)
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Please answer part a and b
Required information For a bolted assembly with six bolts, the stiffness of each bolt is kb 2 Mibf/in and the stiffness of the members is km = 13 Mlbf/in per bolt. An external load of 80 kips is applied to the entire joint. Assume the load is equally distributed to all the bolts. It has been determined to use 1/2 in-13 UNC grade 8 bolts with rolled threads. It is desired to find the range of torque that a mechanic could apply to initially preload the bolts without expecting failure once the joint is loaded. Assume a torque coefficient of K = 0.2. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the maximum bolt preload that can be applied without exceeding the proof strength of the bolts once the load is applied. The maximum bolt preload that can be applied is Ibf.

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