Engineering, 07.11.2019 04:31 melissarodrigue7
An airy stress function is proposed to be: phi = ax^3 + bx^2 y + cxy^2 + dy^3, where sigma_x = partial differential^2 phi /partial differential y^2 = 2cx + 6dy, sigma_y = partial differential^2 phi/partial differential x^2 = 6ax + 2by, tau_xy = -partial differential^2 phi/partial differential x partial differential y = -(2 bx + 2cy) assume a, b, c, d are constants and positive; draw a stress element showing boundary stresses for the following cases: with b=c=d=0 and x-y origin at the left edge of the element and x-y origin at the center of the element with a=d=0 and x-y origin at the center of the element. with the same case as in (2) and c=b=1, determine the boundary forces (that is, normal and shearing forces) on all the edges of a plate measuring 2 m long, 0.5 m wide and 50 mm thick.
Answers: 2
Engineering, 04.07.2019 18:10
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when
Answers: 1
Engineering, 04.07.2019 18:10
True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure
Answers: 2
Engineering, 04.07.2019 18:20
Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um
Answers: 2
Engineering, 04.07.2019 19:20
To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.
Answers: 1
An airy stress function is proposed to be: phi = ax^3 + bx^2 y + cxy^2 + dy^3, where sigma_x = part...
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