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- A cylinder head of a steam engine is held on by 14 bolts. The effective diameter of the cylinder is 35 cm and the steam pressure is 8.5 kg/cm2. Assuming that the bolts are not initially stressed, find the diameter of each of the bolts if the tensile stress is not to exceed 200 kg/cm2.Passing an exploratory section through the body and exposing the internal forces acting on the exploratory section, Pxx produces elongation or contraction in members. T or FA 500 kg box is suspended with a rope and pulley arrangement. Indicate the required intensity and direction for the "T" force. (Use the sine and cosine theorems to solve the problem.)
- A steel railroad rails 10m long are laid with end-to-end clearance of 3mm at a temperature of 15C. (a) At what temperature will the rails just come in contact? (b) What stress would be induced in the rails at that temperature if there were no initial clearance? Use a=11.7x10^-6C and E=200GPa -Draw and label the diagram correctly, No diagram in the solution will be marked wrong. -Shortcut solution will be marked wrong.- Direction of the assumption of the equilibrium equation must be shown, no direction will be marked wrong. -Show complete solution and explanation for the answersPage422, Concept Problem 6.1. Solve this problem completely,butwith the following changes. (1) Continue toassume that the upper plank is 100 mm wide. (2) Assumenowthat the lower plank isreduced to80 mm wide. (3)Assume that each nail shouldwithstand ashearingforce of no more than 100 N.The questions are: (a) What is therequired spacing of the nails in the upper plank? (b) What is the required spacing of the nails in the lower plank?Please keep in mind that thesechangeswill result in many other changes across the board. Discuss all practicalissues in your findings.A steel bolt 8mm diameter fits loosely inside aluminum tube 8mm diameter and 16mm outside diameter.A knot is fitted onto the bolt and tighten against the tube until the stress in the bolt is 40N/m^2.Calculatebthe stress in the bolt.If the temperature of the assembly is now increased by 100°C,what will be the new value of stress in each components. E=200kN/mm^2 for the steel E=70kN/mm^2 for aluminium And coefficient of linear expansion per degree celcius of both steel and aluminum is 10×10^-6/°C and 20×10^-6/°C
- A cylinder head of a steam engine is held on by 14bolts. The effective diameter of the cylinder is 35cm and the steam pressure is 85N/mm².Assuming that the bolts are not initially stressed; find the size of bolts if the tensile stress is not to exceed 20N/mm²A 12-mm thick steel tire has a width of 110 mm and internal diameter of 800 mm. It is heated and trunk onto a steel will 800.50 mm in diameter. The modulus of elasticity of steel is 200 GPa. 1) Which of the following most nearly gives the tensile stress in the tire. a. 145 MPa b. 130 MPa c. 110 MPa d. 125 MPa 2) Which of the following most nearly gives the compressive pressure between the tire and the wheel. a.) 4.35 MPa b.) 3.30 MPa c.) 3.90 MPa d.) 3.75 MPa 3) If the tire has an allowable tensile stress of 124 MPa and is to resist a pressure of 1.50 MPa, which of the following most nearly gives its thickness. a.) 4.84 mm b.) 2.42 mm c.) 2.58 mm d.) 5. 16 mmThe central bar CD of the assembly is heated from 30 ° C to 180 ° C by means of an electrical resistance. Also the two bars AB and EF are heated from 30 ° C to 50 ° C. At the lower temperature of 30 ° C, the space between C and the rigid bar is 0.7 mm. Determine the force in bars AB and EF caused by the increase in temperature. Bars AB and EF are made of steel and each has a cross-sectional area of 125 mm ^ 2; CD is aluminum with a cross-sectional area of 375 mm ^ 2. Steel = 200GP; Ealuminum = 70 GPa; alpha steel = 12 X10 ^ -6 (1 / ºC); alpha aluminum = 23 X10 ^ -6 (1 / ° C).
- Two circular plates with (2d) and (d) as outer and inner diameters respectively, are clamped together by means of a bolt as shown in figure. The bolt is made of plain carbon steel (Sy= 380 MPa and E = 207 GPa), while the plates are made of aluminium (E = 71 GPa) The initial pre-load in the bolt is 3 kN and the external force acting on the bolted joint is 7.5 kN. Determine the size of the bolt from the given table, if the factor of safety is 2.5 and assume coarse threads required.I need to draw a free body diagram and the solution m2=88kgYou are in charge of designing a new fixture for a “universal testing machine” that will attach a tensile specimen to the machine using a clevis—a U-shaped piece with holes drilled through the two arms—and a cylindrical pin that passes through the clevis and the specimen. If the maximum load exerted by the machine is 30 kN and the pin is to be made of some sort of steel, what is the minimum pin diameter needed to ensure that the shear stress in the pin does not exceed 600 MPa? Assume that the steel has similar elastic properties to pure Fe.