- Livraria Air Books
- Handbook Of Metal Fatigue & Fracture In Engineering Material
In materials science, fatigue is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. The nominal maximum stress values are less than the ultimate tensile stress limit, and may be below the yield stress limit of the material. Fatigue occurs when a material is subjected to repeat loading and unloading. If the loads are above a certain threshold, microscopic cracks will begin to form at the surface. Eventually a crack will reach a critical size, and the structure will suddenly fracture. The shape of the structure will significantly affect the fatigue life; square holes or sharp corners will lead to elevated local stresses where fatigue cracks can initiate. Round holes and smooth transitions or fillets are therefore important to increase the fatigue strength of the structure. This Handbook will cover from the earlier stages till present developments. At about the beginning of the 20th century, it was found that initiation of fatigue from a smooth surface was preceded by plastic slip and later by reversals of this slip at the surface to form an intrusion leading to a crack growing failure. It was thereafter frequently concluded that below a certain stress level-the so called “endurance limit”-this reversing slip and/or crack initiation would not occur and fatigue failure could be avoided.
AUTOR: Gevins Zeitlin
EDITORA: Auris Reference
DISPONIBILIDADE DO PRODUTO: Sob Encomenda - Até 40 dias ( Importação )