Calculate the mean and alternating values of th Calculate the mean and alternating moments an Calculate the endurance limit Find the factor of safety by using DE-ASME EIli
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- A copper alloy pipe with a yield stress aY= 290 MPa. is to carry an axial tensile load P = 1500 kN (see figure part a). Use a factor of safety of 1.8 against yielding. (a) If the thickness t of the pipe is one-eighth of its outer diameter, what is the minimum required outer diameter dmin? (b) Repeat part (a) if the tube has a hole of diameter dt 10 drilled through the entire tube, as shown in the figure part b.Two sections of steel drill pipe, joined by bolted flange plates at Ä are being tested to assess the adequacy of both the pipes. In the test, the pipe structure is fixed at A, a concentrated torque of 500 kN - m is applied at x = 0.5 m, and uniformly distributed torque intensity t1= 250 kN m/m is applied on pipe BC. Both pipes have the same inner diameter = 200 mm. Pipe AB has thickness tAB=15 mm, while pipe BC has thickness TBC= 12 mm. Find the maximum shear stress and maximum twist of the pipe and their locations along the pipe. Assume G = 75 GPa.A scuba t a n k (see fig ure) i s bci ng d e signed fo r an internal pressure of 2640 psi with a factor of safety of 2,0 with respect to yielding. The yield stress of the steel is 65,000 psi in tension and 32,000 psi in shear, (a) If the diameter of the tank is 7,0 in., what is the minimum required wall thickness? (b) If the wall thickness is 0.25 in., what is the maximum acceptable internal pressure?
- The hollow drill pipe for an oil well (sec figure) is 6,2 in. in outer diameter and 0.75 in. in thickness. Just above the bit, the compressive force in the pipe (due to the weight of the pipe) is 62 kips and the torque (due to drilling) is 185 kip-in. Determine the maximum tensile, compressive, and shear stresses in the drill pipe.A ho]]ow cinu]ar co]d-ro]]ed bronze ]Gi : 6,500 ksi] tube ( 1 ) with an outside diamctc'f of 1 .75 in. and an inside diam- eter of 1.25 in. is securely bonded to a solid 1.25-in.-diameter cold-rolled stainless steel IC! : 12,S00 ksil core (2) as shown in Figure . The allowable sham stress of tube ( 1 ) is 27 ksi. and the allowable shear stress of core (2) is 60 ksi. Determine (a) the allowable torque T that cm tv applied to the tube-and- corc assembly. (b) the corresponding torqucs produced in tube ( 1 ) and core (2). (c) the ' angle of twist produced in a IO-in. length of the aswmbly by the all(cable torque 71In Figure 2 shown, shaft A, made of AISI 1010 hot-rolled steel, is welded to a fixed support and is subjected to loading by equal and opposite forces F via shaft B. A theoretical stress concentration Kt of 1.6 is induced by the 3-mm fillet. The length of shaft A from the fixed support to the connection at shaft B is 1 m. The load F cycles from 0.5 to 3. a) For shaft A, find the factor of safety for infinite life using the modified Goodman fatigue failure criterion. b) Repeat part (a) using the Gerber fatigue failure criterion.
- Please present FBD/s A tri mettalic bar is uniformly compressed by an axial force P=12kN applied through a rigid end plate. THe bar consists of a circular stell core sorrounded by brass and copper tubes. The steel core has a diamter 10mm, the brass trube has an oute diameter of 15mm and the copper tube has an outer diameter of 20mm. E for steel =210 GPa, E for brass = 100GPa and E for copper is 120GPa. Calculate the compressive stress of each metral due to force P.A cylindrical steel pressure vessel has hemispherical emd caps. The inner radiuos of the vessel is 24 in anf the wall thickness is constant at o.25 in. When the vessel is presseured to 125 psi determine the following. A. The stresses of the cylinder r and hemispgerical caps. B. Based from the allowable working pressure of the blvessel solved in item a, if the pressure is increased to 250 psi what shall be the uniform thickness of the tank3. The hydraulic cylinder shown in the figure has a D = 6.7-cm bore and is to operateat a pressure of 11 MPa. With the clevis mount shown in figure for Q. No. 3, thepiston rod should be sized as a column with both ends rounded for any plane ofbuckling. The rod is to be made of forged AISI 1030 steel without further heattreatment.(a) Use a design factor nd = 2.5 and select a preferred size for the rod diameterif the column length is 2 m.(b) Repeat part (a) but for a column length of 51cm.(c) What factor of safety actually results for each of the cases above?
- Two steels are being considered for manufacture of as-forged connecting rods subjected to bending loads. One is AISI 4340 Cr-Mo-Ni steel capable of being heat-treated to a tensile strength of 260 ksi. The other is a plain carbon steel AISI 1040 with a ultimate strength of 113 ksi. Each rod is to have a size giving an equivalent diameter of 0.75 in. Determine the endurance limit for each material. Is there any advantage to using the alloy steel for this fatigue application?An AISI 1035 CD steel tube has an OD = 45 mm and a wall thickness of 5 mm. What maximum external pressure can this tube withstand if the largest principal normal stress is not to exceed 80 % of the minimum yield strength of the material? Assume ?? = 0.The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are F1 = 1600 lbf and F2 = 640 lbf. A steady torque of 1600 lbf·in is being transmitted through the shaft between the points of application of the forces. ——————————————- Determine the endurance limit for this material as well as the value after correction for surface finish, sizing, and loading. (You must provide an answer before moving to the next part.) The endurance limit for this material is kpsi. The value after correction for surface finish, sizing, and loading is kpsi.