TABLE OF CONTENTS The subject of stress analysis is usually studied in courses titled "Mechanics of Materials" or "Strength of Materials", and is applied in problems of machine design to determine whether or not the device will withstand the loads to which it may be subjected. Stress analysis is actually an expansion of the more general subject of mechanics and includes the study of the effects of the elastic properties and strengths of the structural materials being considered.
Problems of stress analysis include both static and dynamic loading conditions. They may also include environmental conditions such as temperature, corrosion, radiation, and other factors which can influence material properties in the short or long term.
The simplest type of a stress problem is a pair of static forces acting in opposite directions at the longitudinal axis at the ends of a straight bar of constant cross-section. In that case the stress equals the force divided by the cross-sectional area of the bar.
Q:
A mass of 100 kg is suspended vertically on the end of a 5.00 mm diameter wire. What is the stress in the wire?
Answers
Q:
A one-hundred kg mass exerts a gravitational force of 100 g = 980.66 N. The cross-sectional area of a 5.00 mm diameter wire equals 19.64 10 -6 m 2 the stress in the wire equals- (980.66/19.64) 10 6 = 49.93 MPa
