About the book
Most part failures are generally caused by fatigue phenomena in which fatigue cracks appear due to application of repeated loads. In this sense, fatigue is a phenomena that requires special attention by engineers. This book will attempt to approach some fatigue topics that are generally not a good fit for classical text books.
One of the most important elements that contributes to fatigue failures are the welded joints due to different factors that act over the joint and are producing early failure. Fatigue cracks usually initiate from surface of the component and propagate across the transverse section, perpendicular to the stress direction. Consequently, the crack propagation and fracture mechanics theories should be studied if we want to understand and to find the causes that produce the component failures and to calculate the residual life. Another factor that affects the crack propagation and fatigue is the environment. A comprehensive understanding of the influence of environment over the crack propagation and fatigue has been blocked by the complexity of the problem. The difficulties in understanding the various micromechanisms governing crack initiation and crack propagation are caused by a lack of a truly interdisciplinary approach to the problem.
From another side, currently, numerical models and simulation have become a good alternative to solve problems related to fatigue and crack propagation due the relatively low cost and short time expended in this labor, so the book will try to give an overview of the topic. Generally, the fatigue has been studied through the materials more used in engineering (steel, aluminum, bronze), but in recent years, the use of the non-conventional materials like naturals (bamboo, wood, natural fibers), composite materials and others has taken great relevance in engineering applications.