A steel bar with dimensions and cross section shown is suspended vertically. Three concentric downward loads are applied to the bar: 22 250N at the lower end; 13 500 N at 0.35m above the lower end, and 9000N at 1m above the lower end. The modulus of elasticity of the steel is 210GPa. What is the total change in length of the bar?

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Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.