Fatigue Crack Propagation In Several Titanium And Stainless Steel Alloys And One Superalloy

Thematerialsusedinmanufacturingtheaerospace,aircraft,automobile,andnuclear parts have inherent aws that may grow under uctuating load environments during the operational phase of the structural hardware. The design philosophy, material selection, analysis approach, testing, quality control, inspection, and manufacturing are key elements that can contribute to failure prevention and assure a trouble-free structure. To have a robust structure, it must be designed to withstand the envir- mental load throughout its service life, even when the structure has pre-existing aws or when a part of the structure has already failed. If the design philosophy of the structure is based on the fail-safe requirements, or multiple load path design, partial failure of a structural component due to crack propagation is localized and safely contained or arrested. For that reason, proper inspection technique must be scheduled for reusable parts to detect the amount and rate of crack growth, and the possible need for repairing or replacement of the part. An example of a fail-sa- designed structure with crack-arrest feature, common to all aircraft structural parts, is the skin-stiffened design con guration. However, in other cases, the design p- losophy has safe-life or single load path feature, where analysts must demonstrate that parts have adequate life during their service operation and the possibility of catastrophic failure is remote. For example, all pressurized vessels that have single load path feature are classi ed as high-risk parts. During their service operation, these tanks may develop cracks, which will grow gradually in a stable manner.

Bibliography on the Fatigue of Materials, Components and Structures, Volume 3 addresses the problems associated with fatigue loadings as evident in branches of engineering and technology. Such debilitating factor also affects the human skeletal system. The book provides several references that show an increasing focus being given to the problem of fatigue in materials, components, and structures. The journals and lists of references used in the book, which discuss the subject of fatigue, are chosen to give an initial identification of citations. These sources are accompanied by computer-based documentation systems. The bibliographical data for each citation are thoroughly reviewed by checking the original bases of publication. The references in the book are arranged chronologically according to its year of publication. Major use has been made of abbreviations for the titles of journals and publications. The book can serve as a valuable tool for doctors, therapists, students, and researchers in the field of medicine.