Explain stress and strain in detail with its different types.

1.	Explain stress and strain in detail with its different types.
Answer» What are types of stress and strain?Stress: The internal resistance which the body offers to meet with the load is called stress .ie., tendency of a body to resist deformation which is caused by load acting on it.units are N/mm^2 or KN/mm^2stress are classified intoSimple or Direct stressTensioncompressionshearsimple tension and simple compression occur when applied force (load) is linear with the axis of member and simple shear occurs when equal, parallel and opposite forces tend to cause a surface slide relative to adjacent surface.2. Indirect stress:BendingTorsionIn certain loading situations, stresses cause the member to bend resulting in deformation of material such stresses are called indirect stresses.3.Combined stress: Any possible combination of direct and indirect stresses.Strain: The strain is deformation produced by stressTensile strain: strain caused by tensional stress ie ratio of increase in length to actual lengthCompressive strain: strain caused due to compressive stress ie ratio of decrease in length to actual lengthShear strain: in case of shearing load shear strain will be produced which is measured by an angle through which the body deformsVolumetric strain: it is ration between change in volume and original volume of the body

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