The percentage elongation of the metal-stress , Mechanical Engineering

Question 1

A metal rod has a diameter of 8.74 mm and supports a load of 24.6 kN. Calculate the value of true stress on the rod. The diameter was measured with the load already applied. Information for questions 2 to 5:

1978_load 1.png

Question 2

In relation to the arrowed regions in which of the load-elongation curves above is the region in which work (strain) hardening occurs, most accurately depicted? Answer (1), (2), (3), (4), (5) or 'None of them'.

Question 3

In relation to the arrowed regions in which of the load-elongation curves is the region in which plastic instability or necking occurs, most accurately depicted? Answer (1), (2), (3), (4), (5) or 'None of them'.

Question 4

In relation to the arrowed regions in which of the load-elongation curves is the region where yielding occurs most accurately depicted? Answer (1), (2), (3), (4), (5) or 'None of them'.

Question 5

In relation to the arrowed regions in which of the load-elongation curves is the region where plastic deformation occurs most accurately depicted? Answer (1), (2), (3), (4), (5) or 'None of them'.

Information for questions 6 to 11:

1036_load_elongation.png

A tensile test on a specimen having an initial diameter of 13.11 mm and an initial gauge length of 200.0 mm, gave the following data:

Plot the data in suitable graphical form and determine the values in questions 6 to 11. It is suggested to plot a separate graph to have an exaggerated 'Elongation' axis, so that the first part of the deformation process can be enlarged and accurate values can be obtained.

Also it may not be possible to calculate all of the values requested. If you think a value cannot be calculated, you should answer, 'Not possible to calculate this value'.

Question 6

What is the modulus of elasticity of the material?

Question 7

What is the limit of proportionality for the material?

Question 8

What is the proof strength of the material?

Question 9

What is the percentage reduction of area of the material?

Question 10

What is the tensile strength of the material?

Question 11

What is the true stress at maximum load for the material?

Information for questions 12 and 13:

A tensile test of a metal specimen, with an initial diameter of 9.90 mm and an initial gauge length of 65.0 mm, gave the following data in the initial stages of the test.

Question 12

What is the percentage elongation of the metal?

Question 13

What is the true stress at fracture for the metal?

Posted Date: 3/2/2013 4:46:55 AM | Location : United States







Related Discussions:- The percentage elongation of the metal-stress , Assignment Help, Ask Question on The percentage elongation of the metal-stress , Get Answer, Expert's Help, The percentage elongation of the metal-stress Discussions

Write discussion on The percentage elongation of the metal-stress
Your posts are moderated
Related Questions
Q. What do you mean by extrusion? • Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed or drawn through a die of the desir

One end of a rod, 35 mm in diameter, is diped into a furnace with the other end projecting in the outer air. After the steady state is obtained, the temperature of the rod is evalu

Component s of Steam Power Plant: There are four components of steam power plant: 1. The boiler: Hot-source reservoir in which the combustion gases raise steam. 2. Engi

Q. Illustrate Wood and Silica Flour? Wood Flour : It is ground wood particles or other cellulose materials such as grain hulls. They serve the same purpose as cereals except t


Question: (a) (i) Describe the difference between intrinsic and extrinsic semiconductors. (ii)Is it possible for compound semiconductors to exhibit intrinsic behaviour? Desc

what is importance of process planning?

A copper bar 80 mm by 60 mm in cross-section (k = 370 W/m ºC) is lying in a insulated trough so that the heat transfer from one face both the edges is negligible. It is seen that w

Q. Flange Assembly with Bolt Tensioning? Measure the free length of the bolts ultrasonically. This must be done prior to applying any load to the bolt. Install bolts on the

A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (θ = 60.0°) Suppose the tota