ZL.m An M8x1 bolt joins to members of 40 mm total thickness. The bolt and members are made of the same material (o, = 300 MPa, E = 120 GPa), Fi=3KN, Pw=4KN. Check join failure.
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- A 0.5-in.-diameter steel [E= 30,000 ksi] bolt (1) is placed in a copper tube (2). The copper [E= 16,000 ksi] tube has an outside diameter of 1.00 in., a wall thickness of 0.125 in., and a length of L= 8.0 in. Rigid washers, each with a thickness of t= 0.125 in., cap the ends of the copper tube. The bolt has 20 threads per inch. This means that each time the nut is turned one complete revolution, the nut advances 0.05 in. (i.e., 1/20 in.). The nut is hand-tightened on the bolt until the bolt, nut, washers, and tube are just snug, meaning that all slack has been removed from the assembly but no stress has yet been induced. What stresses are produced in the bolt and in the tube if the nut is tightened an additional quarter turn past the snug-tight condition?a)Describe 4 assumptions in the Euler theory of buckling.b)Euler theory does not take into consideration the direct compressive stress; therefore,it is obvious that Euler’s formula holds good only for(i) short column(ii) intermediate column(iii)long column2. What is the tensile load of a 1/2 in x 4 in x 12ft steel tie rod experiences an 80°F temperature decrease from the no - stress temperature? E=30x10^6 psi, a=6.5x10^-5/°F
- What is the Weibull modulus of this material? Would you advise the use of a similar material with a Weibull Modulus of 16.3 and a mean failure stress of 485 MPa, if you anticipate that the peak stress on the material could be 430 MPa? a. 15.7 b. Yes c. 18.6 d. 13.4 e. No f. 17.1A right angled bell crank lever is to be designed to raise a load of 5 kN at the short arm end. The lengths of short and long arms are 100 and 450 mm respectively. The lever and the pins are made of steel 30C8 (S = 400 N/mm2). And the factor of safety is 5.the permissible bearing pressure on the pin is 10 N/mm². The lever has a rectangular cross section and the ratio of width to thickness is 3:1. The length to diameter ratio of the fulcrum pin is 1.25:1. Calculate (i) The diameter and length of the fulcrum pin (ii) The dimensions of the cross section.How many bolts are required for LRFD and ASD for the bearing-type connection shown, if PD = 50 k and PL = 100 k? A325 3/4 in bolts, threads excluded from shear plane.
- A 2.5 cm x 7.5 cm steel beam with a length of 61 cm is subjected to a reversed load of 17.8 kN at midpoint. If yield stress and endurance stress are 410 MPa and 155 MPa respectively, what should be the minimum factor of safety? A helical spring has a free length of 203 mm, outside diameter of 115 mm and a wire diameter of 13 mm. It consist of 9.5 coils squared and grounded at the ends. If it is compressed to its solid length, what is the stress in the spring? Let G = 80 GPa.For the lap connection shown, the rivets are 19-mm diameter and the plates are 8 mm thick. The rivets used are A502, Grade 1 and the plates are ASTM A36 with Fu = 400 MPa. Determine the value of Pin all possible modes of failure and the safe value of P that the connection can resist. Fv = 120 MPa, Fp = 1.2 Fu. Add 1.6 mm for the hole diameter. Ans. 297.6 KNWhich of the following is the design stress for a piston rod where the axial load is completely reversed if the surface of the rod is ground and the surface finish factor is 0.9? Assume no stress concentration. Use a factor of safety of 2 and an endurance limit of 250 MPa. The load factor for completely reversed axial load is 0.85.
- 22. Series of steel wires support a large tower. It is estimated that the load on each wire will be 2500 lbf. Determine the minimum required wire diameter (in inches). Assuming factor of safety of 2 and a yield strength of 1030MPa. Round of to nearest tenths.A semi-elliptic spring used for automobile suspension, consists of two extra full-length leaves and eight graduated-length leaves, including the master leaf. The centre-to centre distance between the two eyes is 1 m. The leaves are made of steel 55Si2Mo90 (Syt = 1500 N/mm2and E = 207000 N/mm2) and the factor of safety is 2. The maximum spring load is 30 kN. The leaves are pre- stressed so as to equalize stresses in all leaves under maximum load. Determine the dimensions of the cross-section of the leaves and the deflection at the end of the spring.Draw FBD and determine Stress and Safety Factor of Bicycle Axle (Thru Axel) Specification Weight of cyclist = 120 kg. Materials: Aluminum alloy (AL 6061-T6) Dimension: Length = 122 mm, Diameter = 12 mm, Thread pitch = 1.75 mm, Thread Length = 16 mm.