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Two engineering materials are subjected to fully-reversed, strain-controlled, cyclic deformation at room temperature. The first, a substitutional solid soution alloy, exhibits an isotropic hardening response. The second is a composite whose matrix is identical to the first alloy; spherical ceramic particles, 25% by volume, are uniformly dispersed in this matrix.
(a) Speculate on the dislocation-particle interactions in the second material during cyclic plastic deformation.
(b) Schematically sketch the shape of the cyclic stress-strain curve during repeated tension-compression loading.
(c) Discuss the type of hardening rule you would use to model the cyclic constitutive behavior of the composite.
A simply supported beam 100 feet in length is pinned at its left end and supported on a roller at its right end. There is a uniformly distributed load of 10 kips/ft along the entire length of the beam. There is also a concentrated load of 20 kips dow..
A driver with his passenger vehicle is driving at 35 mph, when the traffic signal in front of him changes to yellow. He is 100 feet from the intersection when he applies the brakes after a 1-second reaction time.
1. why the prediction are less than the observed result of connection in tension experiment?2. what difference does the
knowing that both members are in compression and that the force is 15 KN in member A and 10 KN in member B, determine by trigonmetry the magnitude and direction of the resultant of the force applied to the bracket by member A and B.
These concentrations were measured when the trailers were 2 years old and the emission rate had significantly decreased by that time. New material rates as high as 290 mg/hr have been reported. Calculate the steady state HCHO concentration (ug/m3) re..
Input parameters for the function should be the lower and upper bounds of the root. Obtain reasonable values for the lower and upper bounds by graphing the function in Excel. Turn in your code for the VBA function.
using the principles to developed in chapter 3 on equilibrium, one can determine that the tension in cable AB is 143.4 N. Determine the moment about the x-axis of this tension force acting on point A.
Determine the number of man-hours required to form the structure using data from R. S. Means or other appropriate reference. What is the difference between labor cost and labor pro-ductivity?
Drawdown data from an observation piezometer near a well used for a pumping test with constant pumping rate is plotted on a semilog plot vs. time (the time axis, on the horizontal, is on a log scale).
Calculate and compare the ozone concentration in ug/m^3 for a polluted day in Mexico City (210 ppbv ozone, 30 C, 0.77 atmospheres pressure) and the ozone concentration in the stratosphere (8 ppmv ozone at 30 km). Use the Standard Atmosphere to get pr..
compressed nitrogen (140 lbm) is stored in a spherical tank of diameter D = 2.5 ft @ temp. of 77 degrees Fahrenheit . what is the pressure inside the tank? if the max allowable stress is 30 ksi, find the minimum theoretical wall thickness.
vehicle A enters the interstate and travel at 60 mph for 1/2 hour, stops for 30 mins then continues at 70 mph. If a vehicle B enters the interstate at the same location as A,
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