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A 12.75 inch outer diameter single walled pipe bending test was executed and theoretical and FE analysis of this test was performed as preparation for 12.75 inch outer diameter TFP bending tests. The main objective of the TFP bending tests was to determine the initiation and degree of liner wrinkling occurring during the TFP spooling-on phase when simulating the reeling pipelay installation method. Due to lack of a definition of liner wrinkling initiation, the crossing of a certain threshold of the liner wrinkle height was defined as liner wrinkling initiation. The bending tests results indicated that (1) the extent of liner wrinkling decreased if TFP with a high mechanical bonding strength was used. (2) The presence of a circumferential weld in the highly bonded TFPs initiated higher liner wrinkles at lower curvatures than in case no circumferential weld was present. (3) The ERW outer pipe longitudinal weld did not result in higher liner wrinkles. API residual compressive stress tests showed that the initial mechanical bonding strength in the 12.75 inch TFP used in this research was significantly reduced, irrespective of whether a high or a low initial mechanical bonding strength had been used prior to spooling-on. These findings justify further research into this phenomenon as the eventual mechanical bonding strength after reeling installation may be vital for its anticipated application during operation.

A parametric element is formulated which enables the economic modelling of 'infinite domain' type problems. A typical problem is an opening in a stress field in an infinite medium, either in two or three dimensions. The strategy is to model around the opening with two or three layers of conventional isoparametric finite elements and surround these with a single layer of 'infinite domain' elements.Several sample problems have been analysed for circular, square and spherical openings in infinite media, and the results compared with either theoretical or boundary element solutions which include the 'infinite' boundary in their solution technique.

Finite Element Multidisciplinary Analysis, second edition, by Kajal K. Gupta and John L. Meek, brings together several diverse disciplines used in the design of aircraft and space vehicles in which the powerful concept of finite elements is utilized. This second edition of the book fills a gap within the finite element literature by addressing the challenges and developments in structural mechanics, heat transfer, fluid mechanics, controls engineering, and propulsion technology and their interaction as encountered in many practical problems in aeronautical, mechanical, and aerospace engineering. The synergism of writing this text by the leading NASA expert in the development of finite element codes and by a university professor and author of one of the earliest textbooks on finite elements in structural mechanics has produced an outstanding textbook as well as a rich source of reference materials for practicing engineers. Kajal Gupta is well known for his development of NASA STARS (Structural Analysis Routines), a multidisciplinary, finite element based, graphics oriented, linear and nonlinear software that includes such disciplines as structural mechanics, heat transfer, linear aerodynamics, computational fluid dynamics (CFD), and controls engineering. A version of this program is available from the first author. John Meek is particularly known for his book, Matrix Structural Analysis, published in 1971, which was a comprehensive exposition of the state-of-the art of finite element methods of analysis for structural systems.The present text covers several fields of engineering disciplines that can be separately analyzed using finite element techniques and leads to the concept of interdisciplinary analysis in which two or more disciplines are interdependent. This includes interactions of structures, materials, heat transfer, aerodynamics, propulsion, controls, and servomechanisms. A particularly welcome addition is the inclusion of numerical solutions to several examples for each chapter. This greatly helps the reader in understanding the practical applications of finite element techniques used in these examples. The second edition covers additional topics on CFD, aeroelasticity, aeroservoelasticity, optimization, and sparse matrix storage and decomposition using current frontal techniques.This text is recommended for senior level undergraduate or graduate level courses in aeronautical engineering and related disciplines. It also can be used for practicing engineers by providing them with an overview of the multidisciplinary analysis based on finite element concepts, including solutions to practical problems.The AIAA Education Series of textbooks and monographs embraces a broad spectrum of theory and application of different disciplines in aeronautics and astronautics, including aerospace design practice. The series also includes texts on defense science, engineering, and management. The books serve as teaching texts Purchased from American Institute of Aeronautics and Astronautics Downloaded by University Librar...