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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.
Given that the average power plant produces 667 MW of electricity per year, there are 492 coal plants in the US, and a solar constant of 1.361 KW/m^2, how large of an area would one need to cover with solar cells
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Two level sections of an east highway (G=0) are to be connected. Currently, the two sections of highway are seperated by a 4000-ft (horizontal distance), 2% grade. The westernmost section of highway is the higher of the two and is at elevation 100 ft..
A river with 400 ppm of salts (a conservative substance) and an upstream flow of 25 m^3/s receives an agricultural discharge of 5.0 m^3/s carrying 2000 mg/L of salts. The salts quickly become uniformly distributed in the river
Derive a relation for the COP of the two-stage refrigeration system with a flash chamber as shown in Fig. 11-12 in terms of the enthalpies and the quality at state 6. Consider a unit mass in the condenser.
A section of a road has a superelevation of .6% and a curve of 600ft radius. What speed limit will you recommend at this section of the highway
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