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A metal matrix composite (MMC) is made of a 2024 Al alloy matrix and continuous boron fibers. The boron fibers are produced with a 12.5 μm diameter tungsten-wire core which is coated with boron to make a final 100 μm diameter fiber. A unidirectional composite is made of 54 vol % of the boron fibers in the Al 2024 matrix. Assuming the law of mixtures applies to isostrain conditions; calculate the tensile modulus of the composite in the direction of the fibers. [ E(B) = 379 GPa, E (W) = 410 GPa, E (Al) = 72.4 GPa]
The link BD is a single solid bar with a width x thickness measuring 1.000 in. x 0.50 in. If the pins at A, B and D have a diameter of 0.375 in, determine the average normal stress in link BD when:(b) Fx = 0 and Fy =4.00 kips.
The hydrogen spectrum has a red line at 656 nm and a blue line at 434 nm. What is the first order angular separations between these two spectral lines obtained with a diffraction grating that has 4500 lines per centimeter?
Determine the natural frequencies of the system. For the baseline system I get natural frequencies at the following engine speeds: 435, 2026, 2818, 5225, 7093, 10245, and 12153 rpm.
At the end of the isothermalexpansion, the pressure is 600 kPa and the volume is 0.4 m3. Assuming the ideal gas model for air, determine the thermal efficiency.
solution of oblique-angled triangle all threesides known two side at 7.5 in. and base at .3437 in. what are the angles ?
a 2.5 lbf block b is moving with a velocity vo of magnitude vo 6fts as it hits the 1.5 lbf sphere a which is at rest
Whit is the critical crack length in iron according to the Griffith-Orowan equation if surface energy=10^3J/m^2?
The total time it takes to fall is 37 seconds. Find the horizontal lead to hit the target.
propane gas enters a continuous adiabatic heat exchanger at 40degc and 250 kpa and exits at 240degc superheated steam
A heat pump with a COP (coefficient of performance) of 2.8 is used to heat an air-tight house. When running, the heat pump consumes 5 kW of power
What tightening torque should be used if the connection is permanent and the fasteners are lubricated? What portion of the external load is taken by the bolts? By the members?
the cylinder is made from steel where yield stress= 240 MPa and v=0.3. Subsequently sketch the hoop and radial stresses in the wall of the cylinder.
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