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Discuss the cyclic deformation of a material in terms of the two-element Masing model, assuming elastic-perfectly plastic response.
(a) Construct the hysteresis loops for a small amplitude at which only the softer elements yield plastically and for a larger amplitude at which both elements yield plastically.
(b) Show that the so-called 'permanent softening' is expected only in one of the two cases and that the amount of permanent softening is equal to twice the internal back stress in the soft elements.
(c) Considering both cases, can permanent softening be considered an unambiguous measure of the back stress?
(d) Describe the occurrence of the Bauschinger effect in terms of deformation-induced internal
A trapezoidal canal 6m wide at the bottom and having a side slope of 1V:2H carries water with a mean velocity of 1.0m/s to a depth of 60cm. What length of contracted rectangular weir 1.0m high should be placed at the middle of the canal to make th..
A waste heat source is available at 400°C. A heat engine operates using heat from this source. It rejects heat to the surroundings at 38°C. The power from the engine runs an air conditioner to keep the air inside a building at 25°C
Instruments in airplane A indicate that with respect to the air the plane is headed 30 degrees north of east with an air speed of 480 km/hr. At the same time, radar on ship B indicates that the relative velocity of the plane with respect to the ship ..
The concentration of BOD (an indicator of organic pollution) in a river just downstream of a sewage treatment plant's effluent pipe is 75 mg/L. If the BOD is destroyed by a first order reaction with rate constant equal to 0.05/day
A particle moves along a horizontal straight line with a constant acceleration of 5 meters per second squared to the left. The particle starts with a velocity of 10 meters per second to the right.
A toothpaste factory situated on a large river disposes of a waste water containing villiamite (NaF) to the river on a continuous basis. The minimum flow in the river is 210 m3/s, and the discharge rate from the treatment plant is 12.5 m3/s.
A long trough is supported by a hinge along its lower edge and a series of horizontal cables attached to its upper edge. Determine the tension in each of the cables, at a time when the trough is full of water.
Two level sections of an east-west highway (G = 0) are to be connected. Currently, the two sections of highway are separated by a 4000-ft (horizontal distance), 2 % grade.
A light spring of a constant k=90.0 N/m is attached vertically to atable. A 2.00g balloon is filled with helium (density 0.180 kg/m^3)to a volume of 5.00m^3 and is then connected to the spring, causingit to stretch. Determine the extension distance L..
A 12in diameter water main in your city has become very rough due to rust and corrosion, it has been suggested that the flowrate through the this pipe can be increased by inserting a smooth plastic liner into the pipe.
A golfer is out of bounds and in a gulley. For the initial conditions shown, determine the coordinates of the point of first impact of the golf ball. The camera platform B is in the plane of the trajectory.
Find the magnitude and depth of the point of application of the force on the circular gate shown (circular gate at an angle of 60 deg.) if h(distance from top of gate to top of water)=5ft. and D(length of the gate)=4 ft.
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