For lack of a suitable material supply, a thin-walled cylinder is machined from a thick plate of 7178-T651 aluminum alloy such that the cylinder axis is oriented parallel to the rolling direction of the plate. If the cylinder’s diameter and wall thickness are 5 cm and 0.5 cm, respectively, determine whether the cylinder could withstand a pressure of 50 MPa in the presence of a 0.2-cm-deep semicircular surface flaw.
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.
For lack of a suitable material supply, a thin-walled
cylinder is machined from a thick plate of 7178-T651
aluminum alloy such that the cylinder axis is oriented
parallel to the rolling direction of the plate. If the cylinder’s
diameter and wall thickness are 5 cm and 0.5 cm, respectively, determine whether the cylinder could withstand a
pressure of 50 MPa in the presence of a 0.2-cm-deep
semicircular surface flaw.
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