Q1) A Section of railway track consists of a steel bar of length 15m and cross-sectional area 80cm2.It is rigidly clamped at its ends on a day when the temperature is 20oC. If the temperature falls to 0oC, calculate: a)the force the clamps must exert to stop the bar contracting b)the strain energy stored in the bar (given: for steel, the coefficient of linear expansion, α = 12 x 10-6 k-1 and young’s modulus is 2 x 1011 Pa)

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Dependence on mechanical properties

The mechanical properties of materials are those structures that include the reaction to the load used. Metal switching features determine the scope of the usefulness of the content and establish the expected service life. Machine structures are also used to help distinguish and identify material objects. The most common mechanical properties considered are strength, ductility, stiffness, impact resistance, and resilience to fractures.