d) A cylindrical rod 100 mm long and having a diameter of 10 mm is to be defomed using a tensile load of 27,500 N. It must not experience either plastic defomation or a diameter reduction of more than 7.5 x 103 mm. Identify the suitable materials which is found in table Q1(d). Table Q1(d) Material Modulus of Elasticity Yield Strength Poisson's Ratio (MPa) (GPa) Aluminum Alloy 70 200 0.33 Brass Alloy 101 300 0.34 Steel Alloy 207 400 0.30 Titanium alloy 107 650 0.34
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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