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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 photograph is taken of a transverse wave travelling along a length of rope. At this instant the shape of the wave is described by y = (2 m) sin ((0.8 rad.m-1)x+0.8 rad). The speed of the wave is 2 m/s. Calculate the distance between two successi..
What is the concentration of MLVSS in the activated sludge (mg L-1)
During frequent braking under race conditions the disk brake rotors on the car described above reach a temperature of 500C. These disk brakes rely on forced convection to cool them. The dimensions of each disk rotor are: outer radius 130mm
Three cylinders from the same mix were tested for strenght. Cylinders A and B were cast in 4x8 molds while cylinder C was cast in a 6x12 mold. The total loads were as follows; cylinder A= 65,200 lbs., cylinder B= 68,550 lbs., cylinder C= 151,190 l..
List down two methods used in analysis of structures in civil engineering
Compute azimuths of all lines for aclosed traverse ABCDEFGHA that has the following balanced angles tothe right, using Bearing AB = N56º18'42"W.
Determine whether these conditions are true or false.
question 1. the variation of 2sdt q with q of a basin is given by q 0.00152sdt q2nbsp 0.1952sdt q - 0.3833. the
A three-span continuous beam ABCD with three equal spans supports a uniform load with intensity q. Determine all reactions of this beam and draw the shear force and bending moment diagrams labelling all critical ordinates.
of 2640 psi with a factor of safety of 2.0 with respect to yielding. the yield stress of the steel is 65,000 psi in tension and 32,000 psi in shear. the diameter of the tank is 7.0 in. the minimum required wall thickness is 0.289 in.
The dissolved oxygen of sample water is 1.5 mg/L. At 25 C, the dissolved oxygen of the dilution water is 8.25 mg/L. You are told the BOD5 of the sample is 130 mg/L. You have a target final dissolved oxygen of 3.0 mg/L (give yourself some leeway).
A horizontal Curve is designed for a two lane mountainous terrain. The following data are known. intersection angle: 40 degrees tangent length: 436.76 ft Station on PI: 2700+10.65 fs=0.12 e=0.08
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