To understand the bending stress in an arbitrary loaded beam, consider a small element cut from the beam as shown in the diagram at the left. The beam type or actual loads does not effect the derivation of bending strain equation. Recall, the basic definition of normal strain is.implifying and rearranging gives, This equation gives the bending normal stress, and is also commonly called the flexure formula. The y term is the distance from the neutral axis (up is positive). The I term is the moment of inertia about the neutral axis.
John Paul Jones was a hero of the colonial navy during the American Revolution. He defeated a British ship in one of the most famous sea battles in history. (1747-92). The first great American naval hero was Captain John Paul Jones.
Navy.mil Home Page. John Paul Jones. A founder of the U.S. Navy. John Paul was born at Arbigland, Kirkbean, Kirkcudbright, Scotland, 6 July 1747. Apprenticed to a merchant at age 13, he went to sea in the brig Friendship to learn the art of seamanship. At 21, he received his first command, the brig John.