Register

Homework Help Question and Answers

Submit a new Query

Recent Homework Help Question & Answers


Question 39565

posted 1 years ago

The two-bay portal frame shown can be subjected to either of the following load systems:
OA horizontal load of 2W at B and a vertical load of 3W at the centre of span CD
(b) A horizontal load of 2W at B and a vertical load of 3W at the centre of spanВС.
If the plastic moment of the beams is 1.5 Mp and that of the columns M, calculate the minimum value of W which would cause collapse of the structure.Sketch the bending moment diagram of the structure at collapse indicating significant values.

View answer

Question 36660

posted 1 years ago

1. A steel rotating-beam test specimen has an ultimate strength of 230 kpsi. Estimate the fatigue strength corresponding to a life of 150*103 cycles of stress reversal.

View answer

Question 36661

posted 1 years ago

2. For the interval 10 3 <N< 10° cycles, develop an expression for the axial fatigue strength (S'fJaxial for the polished specimens of 4130 used to obtain the figure below. The ultimate strength is Sut = 125 kpsi and the endurance limit is (S'e)axial = 50 kpsi.

View answer

Question 36659

posted 1 years ago

2. Describe the stages of fatigue failure

View answer

Question 36658

posted 1 years ago

1. Define fatigue strength and endurance limit

View answer

Question 36662

posted 1 years ago

.The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600rpm and is supported in rolling bearings at A and B. The applied forces are F1 = 2500 Ibf andF2 = 1000 lbf. Determine the minimum fatigue factor of safety based on achieving infinite life.If infinite life is not predicted, estimate the number of cycles to failure. Also check for yielding.

View answer

Question 36125

posted 1 years ago

A simply supported W30x116 is subjected to a uniform service dead load of 1.0 kips/ft(does not include the self-weight of the beam), a uniform service live load of 2.5 kips/ft,and a concentrated service dead load of 45 kips. The beam is 40 ft long and has continuous lateral support.
1. If A572 Grade 50 steel is used, will the W30xl16 be adequate by LRFD?
2. Using Table 3-2, select the lightest weight W-section that can safely carry the required strength by LRFD.

View answer

Question 36126

posted 1 years ago

The figure below shows the arrangement of beams and girders that are used to support a5 inch thick normal weight reinforced concrete (150 pcf) floor slab for a small industrial building. Design the beams AND girders assuming that they are simply supported. Assume full lateral support of the compression flange and a live load of 80psf. Note that the floor and arrangement of beams, girders, and columns continues in the same manner shown onall sides of the framing plan.

View answer

Question 36127

posted 1 years ago

Using LRFD, select the lightest A992 steel W section to serve as the floor beam AB in the frame shown below if the frame supports a service dead load of 20psf and service live load of 45psf. Consider the floor beam to have continuous lateral support. The length of the floor beam is 45ft.

View answer

Question 36136

posted 1 years ago

a) The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600rpm and is supported in rolling bearings at A and B. The applied forces are F, = 1200 lbf and F,= 2400 lbf. Determine the minimum fatigue factor of safety based on achieving infinite life. If infinite life is not predicted, estimate the number of cycles to failure. From Fig. A-15-9 with,r/d = 0.0625/1.625 0.04, D/d 1.875/1.625 1.15, K, =1.95
b) Solve the above problem except include a steady torque of 2200 lbf in being transmitted through the shaft between the points of application of the forces. Use the Goodman criterion. From the problem above we find the completely reversed stress at the critical shoulder fillet to be o = 32.8kpsi, producing o, = 32.8 kpsi and on = 0 kpsi

View answer

Questions not Found

Most popular subject

Thermodynamics

Essay/Summary

Mechanics

Complex Analysis

Engineering Economics

Calculus

Modern Physics

General Chemistry

Strength Of Materials

Fluid Mechanics

x