L 32 mm L Cross-section K, aran : 17 nam + 6 E= 200 kN/mm m = 15 kg KI= lo kN/m Find f
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- A standpipe in a water-supply system (see figure) is 12 ft in diameter and 6 in. thick. Two horizontal pipes carry water out of the standpipe; each is 2 ft in diameter and 1 in. thick. When the system is shut down and water fills the pipes but is not moving, the hoop stress at the bottom of the standpipe is 130 psi, (a) What is the height h of the water in the standpipe? (b) If the bottoms of the pipes are at the same elevation as the bottom of the stand pipe. what is the hoop stress in the pipes?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 plain concrete wall (i.e., a wall with no steel reinforcement) rests on a secure foundation and serves as a small dam on a creek (see figure). The height of the wall is h = 6.0 ft and the thickness of the wall is t = 1.0 ft. Determine the maximum tensile and compressive stresses o*!and trt, respectively, at the base of the wall when the water level reaches the top {d = h). Assume plain concrete has weight density ye= 145 lb/ft . Determine the maximum permissible depth dnuxof the water if there is to be no tension in the concrete.
- A cylindrical brick chimney of height H weighs w = 825 lb/ft of height (see figure). The inner and outer diameters are d1= 3 ft and d2= 4 ft, respectively. The wind pressure against the side of the chimney is p = 10 lb/ft2 of projected area. Determine the maximum height H if there is to be no tension in the brickwork.Solve the preceding problem for a column with e = 0.20 in,, L = 12 ft, I = 2L7in4, and E = 30 × 106psi.Dinding ruang penyimpanan berpendingin adalah panjang 10 m dan tinggi 3 m dan dibangun dengan blok beton 100 mm (k = 0.935 W / [m °C]) dan 12 cm papan isolasi serat (k = 0,048 W). / [m °C]). Suhu ruang pendingin -10 °C dan koefisien perpindahan panas konvektif adalah 40 W / (m² K); suhu udara luar adalah 30 °C dengan koefisien pindahan panas konveksi permukaan dinding luar 10 W / (m² K). Hitung koefisien perpindahan panas keseluruhan. Koefisien pindah panas keseluruhan =AnswerW / (m² K).
- The given plate below with width of 200 mm andthickness of 16 mm is to be connected to two plates ofthe same width with half the thickness by 20 mmdiameter rivets as shown. The rivet hole is 2 mm greaterthan the rivet diameter. Allowable tensile stress on netarea is 0.6Fy. Allowable bearing stress is 1.35Fy. plate: fy = 241 mpa fu = 4141 mpa rivet: fv = 152 mpa Determine maximum load P for block shearHoop stress is limited to (2.4)MPa and density of flywheel material is (7504) Kg/m3The tank shown in the figure is fabricated from 10 mm steel plate. Determine themaximum longitudinal and circumferential stress caused by an internal pressure of 1.2MPa.
- circular cross-section belt pulley system supported by two bearings tensioning forces formed in belts in Shaft power transmission T11 = 8 kN, T12 = 2 kN, T21 = 8 kN and T22 = 2 kN. Pulley weights are 1 no.lu pulley for both pulleys W =6 kN. Each two pulley diameters d = 1,2 m dir. a = 0.2 m ve b = c = 0,4 m. Slip safety stress Jul = 70 MPa a-) Greatest shear stress (TRESCA) b-) The diameter of the shaft (d) according to the largest change in shape (VON MISES) criteriayou can find.Q2. A mild steel shaft transmits ‘P’ kW at ‘N’ r.p.m. It carries a central load of 900 N and is simply supported between the bearings 2.5 metres apart. Determine the size of the shaft, if the allowable shear stress is 42 MPa and the maximum tensile or compressive stress is not to exceed 56 MPa. Power P in KW= 25 , Speed N in rpm=150A flat belt, of density 1000 kg/m3 has a maximum permissible stress of 2·5 MN/m². Thebelt is 200 mm wide and 12 mm thick.(a) Determine the maximum power that can be transmitted if the ratio of tight-side toslack-side tension is 2. The diameter of the driving pulley is 900 mm and the required speed of the output shaft is955 rev/min(b) Taking the belt thickness into account, determine the required diameter of theoutput pulley. (c) What would the required diameter be, assuming a total slip of 4%? (d) If the mass of the belt was neglected, explain the effect (with reasons) this wouldhave on the maximum power calculated in (a)