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A column with one end pinned and another end fixed is made of carbon steel AISI 1020. The column is hollow round bar with internal radius of 20.0 mm, thickness of 3.0 mm and length of 2000.0 mm. Determine a) whether the columns will buckle inelasticity or elastically. (4 marks) b) the buckling stress if the column is subjected with 80N of axial force (8 marks) c) the critical buckling load for the column. (8 marks)
A 3.0 m long spreader, solid cross section with both ends pinned connection to wire rope carry a load of 10000kg. The material is AISI 1060 carbon steel. With factor of safety, 12 determine the following: a) Minimum dimensions of a square, solid cross section is permitted without having failure? (10 marks) b) Minimum dimensions of a square, hollow cross section with thickness of 5.0 mm without having failure?
An Autonomous Landmine Sweeper is required to search and detect 8 landmines each of area 30 cm² placed in a circular surface area as shown in picture below. The circular test area is 165 cm diameter. While the Vehicle dimensions are 16 cm width and 22 cm length
A certain ideal gas has a constant R = 38.9 ft-lf f/lb m-R with k = 1.4. a) If 3 lb m of this gas undergoes a reversible nonflow constant volume process from 120 psia,740 oF to 140 oF find P2, ∆U, ∆H, Q, Work. b) If the process in “a” had been steady flow find work and ∆S.
In the spring system as shown in the figure below, each spring constant is ki=k2=1000 N/mm, k3=500 N/mm, k4=200 N/mm, and the applied load is F2=500 N, F300 N. (1) Find the stiffness equation of the spring system (KU=F). (2) Find the displacement of node 2 and node 3
The armor of a tank can be simulated by a slab of thickness L= 152mm (6in) that is insulated on the right hand side as shown in the Figure A below. The slab is infinite in the y-direction. The left hand side is exposed to enemy fire, that is, an explosion at the surface of the slab. The explosion can be simulated by a surface temperature that varies as shown in Figure B. For the time t>2b the left hand side can be considered as insulated. You are asked to find a) the temperature distribution in the slab, that is T(x,t) for the small time, that is t<2b. b) the temperature in the slab, T(x,t) for large time that is t>>2b c) Determine the length L of the slab such that the temperature does not exceed 150 F after 100 seconds Use a) carbon steel and b) Ni-Cr alloyed steel Tmax= 1500 F; b=1sec; The initial temperature of the slab is 80F a) kst= 43 W/m.K (high k) ρ=7801 kg/m3 cp=473 J/kg.K b) kNi-Cr= 19 W/m.K (low k) ρ=7865 kg/m3 cp=460 J/kg.K L Figure 1 B,Tmax (b,0) 0 T t (2b,0
Steam enters the adiabatic turbine at a temperature of 500C, a pressure of 10 MPa and exits at a pressure of
8 MPa. Determine the work product per unit mass of steam if the process can be reversed.
One kg of air at 40oC dry bulb temperature and 50% relative humidity is mixed with 2 kg of air at 20oC dry bulb temperature and 20oC dew point temperature. Calculate the dry bulb temperature and specific humidity of the mixture. What is the relative humidity and dew point temperature of the mixture?
in the turbine of a gas turbine unit, the gases flow through the turbine at v17 kg/s and the power developedb by the turbine is 14000 kW
What does M stands for in the calculation of deflection of beams.
