How does automation harm and benefit humanity?

-----Demonstrate both sides of the ethical dilemma-----

a.What is the difference between endurance limit materials and others?

b.What is an S-N curve? And explain this based on the wing of an aircraft in flight.

c.Why do fatigue cracks only grow during tension and not compression?

d.Tensile stress levels affect the life expectancy of a part - why?

Explain the significance of, and the mechanisms behind, slip in metals. What is a slip system? In a pure material, what governs the ease of slip? Why are some crystal structures easier to slip than others? Why are ceramic materials normally very resistant to slip?

Use Matlab and write entier script

Problem 2.

Generate the estimate (linear estimate) for y_est, and plot(x , y_est).

Use “hold on” and plot(x,y) and plot(x,y_est), so that you can see the result of the line and how it fits the data.   Does it look like it did a pretty good job?

An estimate of the “residual error” is the sum of the squares of the difference between y and y_est.

This is often denoted as r2.

r2 = sum( (y – y_est) .^2)

or equivalently

r2 = sum( (y – y_est)’ * (y – y_est)’)

What is the residual error for the above problem?

Use Matlab and write entier script

Problem 1.

Using the information above, find y(n) for all n between 1:N.

y(tn)=mx(tn)+b+r(tn)

y=mx+b

Plot the points on a graph, without connecting them with a line.   Use a command like:

plot( x, y, ‘.r’ )

Now we want to find the “best fit” solution.   As was mentioned before, this was defined in the prior exercise. (You may wish to read this to understand how the algorithm works.)   Use the MATLAB code below.

You have the vectors x and y already. You need a vector I, which is a column which each element equal to 1.

Programming Steps:

I = ones(length(x),1);

u = [ x , I ];

w = (u’ * u) \ ( u’ * y) ;

The result is an estimate of the values of m and b.   The estimate for m is w(1) and the estimate for b is w(2). The resulting estimate for y is:

                y_est = u * w;

use newton raphson method to solve the following system of nonlinear equations

x1^2+x2^2=50 ; x1*x2=25

stop after three iterations. initial guess : (x1,x2) = (2,1)

How does Pearlite form (start from the Austenite phase) and why do the layers within an etched Pearlitic microstructure often appear to be of variable separation?

A Projectile is shot at a moving target with initial velocity Vo=2000ft/s. The target is moving at 500ft/s and its initial start was (Xo, Yo)= 200',300' at angle phi=15. the weight of the target is 5lbf. Gravity is 32.3 ft/s^2. Find angle theta the projectile would need to be shot to hit the target. No drag. There is the high angle case and low angle

Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric flow rate of 3 m3/s and expands adiabatically to an exit state of 1 bar, 200°C. Kinetic and potential energy effects are negligible. Determine for the turbine: (a) the power developed, in kW. (b) the rate of entropy production, in kW/K. (c) the percent isentropic turbine efficiency.

Why does a eutectic or eutectoid microstructure take the form that it does?

How does shot peening introduce residual stresses over a material surface?

Explain its mechanism by drawing the material surface plastically deformed as a result of the impact of the shot.     

To become familiar with the general equations of plane strain used for determining in-plane principal strain, maximum in-plane shear strain, and average normal strain.

The state of strain at a point has components of ϵx=350.0×(10−6) , ϵy=−200.0×(10−6), and γxy=150.0×(10−6).

Part A - Equivalent in-plane strains on the oriented element. Determine the equivalent in-plane strains on an element rotated counterclockwise at an angle of θ = 30.0 ∘

Part B - In-plane principal strains on the oriented element. Determine the in-plane principal strains on the oriented element.

Part C - Maximum in-plane shear strain and average normal strain on the oriented element. Determine the maximum in-plane shear strain and the average normal strain on the oriented element.

NOTE: This is my last attempt please I need a correct answer. Thank you in advance.

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1. One example of the Limits of the material being processed in fused deposition modeling is that the material has to be a Thermoplastics. Provide some other examples of the limits of material in FDM.

2. One example of the Limits of the equipment being used in fused deposition modeling is that the machine can only produce small parts. Provide some other examples of the limits of equipmentin FDM.