A rectangular rosette is mounted on a steel plate having a modulus f elasticity E=200GN/m2 and Poission’s ratio =0.3. The strains measured are ε1=500×10-6; ε2=400×10-6; ε3= -100×10-6. Develop a MATLAB code to compute maximum shear stress and the orientation angle for the principle axis of the stress.
In: Mechanical Engineering
Post a one-page essay sharing your position on the following video clip:
Professor' Kaku's talk on The Future of Technology (https://www.youtube.com/watch?v=59Ejxp1tRss)
In: Mechanical Engineering
1.Can i use this material for making wheel(rim) for water hose cart? 2.Which kind of procuction made of this material? 3.What is manifacturing method of produce of them?*polytrimethylene terephthalate(PTT) *PBT * PC+PBT
In: Mechanical Engineering
An air engine is modeled after the ott cycle. Assume ideal gas
and air standard cold valus for properties. Intake air is at 100kPa
and Temperature of 27°C. The compression ration is 8:1. The heat
added during ignition is 1740 kJ/kg
a) Draw and Label the Pv and Ts diagrams for the Otto cycle
b)Find the specific volume at intake state #1
c) Find the temperature at the end of the compression stroke
d) Find the Pressure at the end of the compression stroke
e) Calculate the efficiency for the cycle
f) For the Carnot air heat engine working between the same
temperature resevoirs, what is the Carnot Efficiency
In: Mechanical Engineering
In: Mechanical Engineering
Make a list of the alloying elements used in high-speed steels. Explain what their functions are and why they are so effective in cutting tools.
Please answer me in computer-typing format. Thanks!
In: Mechanical Engineering
true and false questions
a. Any force F acting on a rigid body can be moved to an arbitrary point O provided that a couple is added whose moment is equal to the moment of F about point O.
b. The cross product obeys the commutative law, i.e. A x B = B x A
c. The centroid and center of mass of an object will coincide if we assume that the object is of non-uniform density.
d. In a truss problem that involves a large number of joints, if one is interested to nd the force in only a few members, then the method of joints is a faster approach than the method of sections.
e. In problems that involve shear and bending moment diagrams, if there are no couples applied at the ends of the beam, and if there are no supports imposing moment reactions at the ends, then the bending moment diagram always starts and ends at zero value for the beam's ends.
In: Mechanical Engineering
circle most appropiate choice
1a. Which of the following forces is NOT a conservative force?
a. friction force
b. spring force
c. gravitational force
d. none of the above
1b. In which circumstance is the force of friction between two surfaces at its maximum magnitude?
(Note: subscripts s and k specify the static and dynamic conditions, respectively.)
a. When friction angle satises (Φ < Φs)
b. When friction angle satises (Φ = Φs)
c. When friction angle satises (Φ = Φk)
d. None of the above
1c. Which of the following labels is WRONG?
a. 10e-6 : micro
b. 10e-9 : nano
c. 10e-12 : atto
d. 10e-15 : femto
1d. In curvilinear kinematics, when using the normal and tangential components to express the particle acceleration, the normal acceleration is always _________________.
a. positive
b. negative
c. pointing toward the center of curvature
d. choices a and c
1e. Which one of the following equations are WRONG with respect to cartesian unit vectors i, j, k, along x, y, and z axes, respectively? (Note: (X) indicates the cross product of two vectors)
a. i X j = k
b. k X j = -i
c. k X i = -j
d. j X j = 0
In: Mechanical Engineering
In: Mechanical Engineering
A case study on 'Computational challenges on Elasticity based problems'. (Problems with closed form solution would be preferable).
This topic pertains to Advanced mechanics of material.
In: Mechanical Engineering
I Need the solution of Elasticity Equations for Rectangular Plate Subjected to Bidirectional Sinusoidal load. (A closed form solution would be prefarable).Assume neccesary conditions wherever required.
This question pertains to Advanced mechanics of materials.
In: Mechanical Engineering
How would you measure the hardness of:
a) unmovable part of a large machine which is very heavy to transport?
b) an unknown alloy?
In: Mechanical Engineering
Write Real Life application for Hydraulic Pressure Control Valve using sequence valve in about 300 words?
In: Mechanical Engineering
2 7/8-in., 8.6-lbm/ft tubing, how do we get the inner diamiter from this data? the correct answer is (2.259”) but I don't know how to get it
In: Mechanical Engineering
12. Which component of a vapor-compression refrigeration machine provides for the cooling effect in the conditioned space?
16. Why would one choose a fire tube boiler instead of a water tube boiler?
17. How does one de-humidify an air mass?
18. Define an HVAC zone?
In: Mechanical Engineering