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HyperPhysics - Elasticity

University of Winnipeg - Deformation of Solids
General definitions of stress and strain.

University of Winnipeg - Changes in Length (one dimensional)
Summary of tensile stress, tensile strain and Young's modulus.

University of Winnipeg - Changes in Shape
Summary of shear stress, shear strain, and shear modulus.

University of Winnipeg - Changes in Volume
Summary of volume stress, volume strain, and bulk modulus.

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Special points of emphasis

Newton's Laws

Elastic Properties of Solids

In earlier mechanics we were concerned with the effects on the state of motion of a body caused by the forces upon it. Now we are concerned with the effects of force on the shape of the body itself. A solid body under load experiences a deformation. A deformation is considered elastic if, when the load is removed, the object returns to its original shape.

Elasticity appears fairly regularly on the MCAT, and the basics of this discipline, which is often neglected in lecture course, are pretty easy to master. On the exam, you may be expected to distinguish the three common types of deformation, elongation, shearing and compression, and their corresponding moduli, for example, or you may be asked to distinguish an elastic from a non-elastic deformation.

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