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The Virtual Crack Closure Technique: History, Approach and Applications
An overview of the virtual crack closure technique is presented. The approach used is discussed, the history summarized, and insight into its applications provided. Equations for two-dimensional quadrilateral elements with linear and quadratic shape functions are given. Formula for applying the technique in conjuction with three-dimensional solid elements as well as plate/shell elements are also provided. Necessary modifications for the use of the method with geometrically nonlinear finite element analysis and corrections required for elements at the crack tip with different lengths and widths are discussed. The problems associated with cracks or delaminations propagating between different materials are mentioned briefly, as well as a strategy to minimize these problems. Due to an increased interest in using a fracture mechanics based approach to assess the damage tolerance of composite structures in the design phase and during certification, the engineering problems selected as examples and given as references focus on the application of the technique to components made of composite materials.
Delaware Composites Design Encyclopedia
The six-volume Delaware composites design encyclopedia provides basic knowledge about the design and analysis of composite materials and structures. It is intended for use by engineers, material scientists, designers, and other technical personnel involved in the applications of composite materials to industrial products. Volume 6, Test methods, contains a review of test methods (ASTM standards and guides) for characterizing constituent properties, composite thermomechanical properties, and physical properties. Annotation copyrighted by Book News, Inc., Portland, OR
Animal production and animal science worldwide
"In this third volume of the successful Book of the Year series, produced by the World Association for Animal Production (WAAP) specialists in animal science inform you about the developments in the past year in livestock systems worldwide. The best authors available are chosen to express their competence and expertise on all the aspects considered relevant in each specific field of animal science. This volume, like its predecessors, is based on four sections. The first describes livestock industry and relative research developments in the geographical continents. The second includes efforts to describe the development of research in every discipline within the large ambit of animal science....
NASA Technical Paper
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NASA Technical Paper
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Applied Parallel Computing: Advanced Scientific Computing
This book constitutes the refereed proceedings of the 6th International Conference on Applied Parallel Computing, PARA 2002, held in Espoo, Finland, in June 2002. The 50 revised full papers presented together with nine keynote lectures were carefully reviewed and selected for inclusion in the proceedings. The papers are organized in topical sections on data mining and knowledge discovery, parallel program development, practical experience in parallel computing, computer science, numerical algorithms with hierarchical memory optimization, numerical methods and algorithms, cluster computing, grid and network technologies, and physics and applications.
Sandwich Structures 7: Advancing with Sandwich Structures and Materials
Sandwich structures represent a special form of a laminated composite material or structural elements, where a relatively thick, lightweight and compliant core material separates thin stiff and strong face sheets. The faces are usually made of laminated polymeric based composite materials, and typically, the core can be a honeycomb type material, a polymeric foam or balsa wood. The faces and the core are joined by adhesive bonding, which ensures the load transfer between the sandwich constituent parts. The result is a special laminate with very high bending stiffness and strength to weight ratios. Sandwich structures are being used successfully for a variety of applications such as spacecraft, aircraft, train and car structures, wind turbine blades, boat/ship superstructures, boat/ship hulls and many others. The overall objective of the 7th International Conference on Sandwich Structures (ICSS-7) is to provide a forum for the presentation and discussion of the latest research and technology on all aspects of sandwich structures and materials, spanning the entire spectrum of research to applications in all the fields listed above.
