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Basic Electronics – Battery Notes If you have ever looked at a battery, you will find that there are usually two metal contacts. One is called the positive (+) side, and the other is called the negative side (-). If you connect a wire directly between these two poles, an electrical current will flow through … Read more
Solid Mechanics : Stress Notes The concept of stress originated from the study of strength and failure of solids. The stress field is the distribution of internal “tractions” that balance a given set of external tractions and body forces. First, we look at the external traction T that represents the force per unit area acting at a given location … Read more
Stress Intensity Factor Notes Stress Intensity Factor, K, is used in fracture mechanics to more accurately predict the stress state (“stress intensity”) near the tip of a crack caused by a remote load or residual stresses. When this stress state becomes critical a small crack grows (“extends”) and the material fails. The load at which … Read more