NPTEL :: Mechanical Engineering - Strength of MaterialsIn continuum mechanics , stress is a physical quantity that expresses the internal forces that neighbouring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material which is not a physical quantity. For example, when a solid vertical bar is supporting an overhead weight , each particle in the bar pushes on the particles immediately below it. When a liquid is in a closed container under pressure , each particle gets pushed against by all the surrounding particles. The container walls and the pressure -inducing surface such as a piston push against them in Newtonian reaction. These macroscopic forces are actually the net result of a very large number of intermolecular forces and collisions between the particles in those molecules. Strain inside a material may arise by various mechanisms, such as stress as applied by external forces to the bulk material like gravity or to its surface like contact forces , external pressure, or friction.
Strength of Materials
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Course Name: Statics and Strength of Materials. Credits: 3 3 lecture; 0 lab. Course covers concepts of statics and strength of materials. Content includes forces, force components, trusses, centroids, equilibrium, stress and strain, defection of beams, torsion, and various types of joints. Lecture demonstration of drawing techniques with a hands on focus emphasizing the solution of drawing problems.
Mechanics and Strength of Materials Vitor Dias da Silva Mechanics and Strength of Materials ABC Vitor Dias da Sil Mechanics and Strength of Materials.
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