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The state of plain strain on an element is ?x = 400(10-6 ), ?y = 200(10-6 ), and γxy = -300(10-6 ). Determine the equivalent state of strain, which represents
(a) the principal strains, and
(b) the maximum in-plane shear strain and the associated average normal strain. Specify the orientation of the corresponding element at the point with respect to the original element. Sketch the results on the element.
A barge is 60ft long, 20ft wide, and 8ft deep. When empty, it weighs 210,000lb, and its center of gravity is 1.5ft above the bottom. Is it stable when floating in water?
A bar with a circular cross-sectional area is made of SAE 1045 carbon steel having a yield stress of sY = 1000 MPa. The bar is subjected to a torque T=3.75 kNm and a bending moment M=7 kNm. Using a factor of safety FS=2 with respect to yielding
An external moment of magnitude 110 N-m is applied in the counter clockwise direction as shown. A frictional moment of magnitude 10 N-m resists the rotation. The specific weight of the material is 250 lbs / ft3.
Prove that Ev=kP for an isentropic fluid process given that constant=P/p^k, where p is the density (roe), P is the pressure, k is the ratio of specific heats.
At the end of 15 years, the first motor will have a salvage value of $50 and the second motor will have a salvage value of $100. consider the MARR to be 8%. (note : 1HP=0.7457 kw). Determine which motor should be installed based on the PW criterio..
A square yellow-brass bar must not stretch more than 2.5 mm when it is subjected to a tensile load. Knowing that E = 1.5 GPa and that the allowable tensile strength is 150 MPa
The rain¬fall amounts at three adjacent stations A, B, and C were 4.2, 3.7, and 4.9 in., respectively. The average annual precipitation amounts for the gauges are X = 36.5, A = 42.1, B = 37.1, and C = 39.8 inches.
Nitrate concentrations are often recorded in units of NO3--N/L to be compared with other nitrogen constituents. Near three rural wells nitrate concentrations were reported as 0.25 mg
Using the modulus of elasticity as determined from the graph, calculate the center deflections of the wood for a load of 400 Ibs., and for the load at the last reading taken before rupture occurred. How do these compare with the observed deflecti..
What is the difference between the component pressure and the partial pressure?
In order to comply with regulations, an iron/steel sinter plant installs an electrostatic precipitator (ESP) to collect 98% of the 10 ?m particles from an air stream flowing at 2 m3/s
A key part of the FEM and any FEA model are the appropriate assignment of boundary conditions. Explain why it is necessary to set the appropriate boundary conditions in FEA simulations. What happens if you don't assign boundary conditions or assig..
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