Question (2) Three M30X3.5 ISO grade 8.8 bolts are used in a joint. The joint is being subjected to a maximum load of 210 kN. The joint constant C = 0.35. The bolt has A = 561 mm2, Sp = 600 MPa, Sy = 660 MPa, and Sut=830 MPa. The joint members are made of steel having stiffness parameters A = 0.78715 and B=0.62873. The bolts are tightened to 75% of the proof load. Fill your answers in spaces provided: %3D %3D a) Bolt initial load, Fi= kN %3D b) Bolt tightening torque, T= N.m c) Members' stiffness, Km MN/m %3D MN/m

Question (2) Three M30X3.5 ISO grade 8.8 bolts are used in a joint. The joint is being subjected to a maximum load of 210 kN. The joint constant C = 0.35. The bolt has A = 561 mm2, Sp = 600 MPa, Sy = 660 MPa, and Sut=830 MPa. The joint members are made of steel having stiffness parameters A = 0.78715 and B=0.62873. The bolts are tightened to 75% of the proof load. Fill your answers in spaces provided: %3D %3D a) Bolt initial load, Fi= kN %3D b) Bolt tightening torque, T= N.m c) Members' stiffness, Km MN/m %3D MN/m

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Three M30X3.5 ISO grade 8.8 bolts are used in a joint. The joint is being subjected to a maximum load of 210 kN. The joint constant C = 0.35. The bolt has At=561 mm², Sp=600 MPa, Sy=660 MPa, and Sut = 830 MPa, Se=162 MPa. The joint members are made of steel having stiffness parameters A = 0.78715 and B = 0.62873. The bolts are tightened to 75% of the proof load. Fill your answers in spaces provided and show your calculations on the sheets provided. a) Bolt initial load, F₁ = b) Bolt tightening torque, T = = c) Members' stiffness, Km= d) Bolt stiffness, Kb = e) Bolt resultant load, Fb = KN N.m KN MN/m MN/m
• The connection shown in the figure if the screw is type 9 8 and the two plates are A'SI 1040 CD steel, the highest tensile strength that can be shed longtunally so that the safety factor is nct less than 25 The following possiblities of failure E- Shearing the bolts b-Loading the bolts • Loading into the member. item I tensile in the element M24x3 40 sO 40 -100- 25
Assuming a welded rail line, 1km long, that is unconstrained except at the ends. The rail has a cross sectional profile as given. If the rail was installed at a temperature of 20°C, at what temperature would the rail buckle? How much pre-stress would need to be applied to the rail in order to prevent buckling up to a maximum operating temperature of 40°C? Rail profile 46E1 Equivalent profile name SBBI Section weight kg/m 46.17 Rail height mm (H) 145.00 X Y Y Head width mm (C) 65.00 A H Web thickness mm (A) 14.00 Foot width mm (P) 125.00 Moment of inertia, Ixx cm* 1641.10 Moment of inertia, lyy cm* 298.20
Two plates each with thickness of 18 mm are bolted together with 6 – 20mm ø bolts forming a lap connection. Bolt spacing are as follows: X1 = 50 mm, X2 = 120 mm and X3 = 100 mm FvRivet = 130 MPa. Calculate the the pemissible tensile load P under the following conditions. a. Based on the effective net area. b. Based on block shear. c. Based on the safe value of P.
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…
A -0.5 m- 400 KN B -0.5 m C 0.4 m D E F Figure 2 (not to scale) The assembly shown in Figure 2 consists of two posts AD and CF made of A-36 steel and having a cross-sectional area of 1000 mm², and a 2014-T6 aluminium post BE having a cross-sectional area of 1500 mm². There is a small gap of 0.1 mm between the post BE and the rigid cap ABC. If a central load of 400 KN is applied to the rigid cap ABC, determine the normal stress in each post.
B5
For a bolted assembly, the stiffness of each bolt is ka = 700 MN/m and the stiffness of the members is km = 2100 MN/m per bolt. The joint is subject to occasional disassembly for maintenance and should be preloaded accordingly. An external load is applied to the entire joint with P = 360 kN. Assume the load is equally distributed to all the bolts. It has been determined to use M12x1.75 grade 8.8 bolts with rolled threads. (a) Determine the minimum number of bolts necessary to avoid yielding of the bolts. (b) Determine the minimum number of bolts necessary to avoid joint separation.
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Required information A short cantilevered round peg made from AISI 1030 cold-drawn steel is 40 mm in diameter and extends 10 mm from the wall. It is loaded, as shown, with a force F= 50 kN applied at the tip in the negative z direction and a torque T=800 N-m. The cross section at the wall is also shown, with points of interest A, B, and C. 10 mm 92 The minimum factor of safety is 2.93 Cross section at the wall Evaluate the state of stress at points A, B, and C, determine the critical case, and evaluate the minimum factor of safety based on the distortion-energy theory.
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