Three equidistant vertical rods, each of 20 mm diameter, support a load of 25 kN in the same plane as shown in Fig.1 Initially, all the rods are adjusted to share the load equally. Neglecting any chance of buckling, and taking Esteel = 205 GPa and Ecopper = 100 GPa, determine the initial and final stresses when a further load of 20 kN is added.

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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.