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Author: A. Holston (Jr.) Publisher: ISBN: Category : Bending Languages : en Pages : 164
Book Description
A combined analytical and experimental investigation of the stability of composite cylindrical shells is presented. Forty-five fiber-glass filament wound cylinders were fabricated, buckled, and analyzed. The number 45 stems from considering three diameters (6 in, 12 in, 24 in), three filament configurations, and five loadings. All cylinders had essentially the same wall thickness, .035 in, and each cylinder length was nearly equal to its diameter. The five loadings were: (1) uniform axial compression, (2) torsion, (3) bending, (4)combined torsion and uniform axial compression, (5) combined bending and uniform axial compression. The analysis was based on linear anisotropic shell theory and the effects of boundary conditions were not considered. Preliminary tests were conducted to determine the in-plane stiffnesses and individual layer elastic properties. The experimental buckling loads were from 67 to 90% of predicted values for loading without torsion. The bending buckling stress was, for all practical purposes, equal to the axial buckling stress and the combined bending with uniform axial load interaction was essentially linear. The experimental torsion buckling loads were greater than the predicted values but the boundary conditions were not considered in the analysis. Buckling loads were computed for boron filament wound cylinders of the same size and winding configurations. These computations show that the buckling loads of boron and aluminum cylinders, of the same size, are nearly equal. A similar comparison on a weight basis would produce the same result since their densities are essentially equal.
Author: A. Holston (Jr.) Publisher: ISBN: Category : Bending Languages : en Pages : 164
Book Description
A combined analytical and experimental investigation of the stability of composite cylindrical shells is presented. Forty-five fiber-glass filament wound cylinders were fabricated, buckled, and analyzed. The number 45 stems from considering three diameters (6 in, 12 in, 24 in), three filament configurations, and five loadings. All cylinders had essentially the same wall thickness, .035 in, and each cylinder length was nearly equal to its diameter. The five loadings were: (1) uniform axial compression, (2) torsion, (3) bending, (4)combined torsion and uniform axial compression, (5) combined bending and uniform axial compression. The analysis was based on linear anisotropic shell theory and the effects of boundary conditions were not considered. Preliminary tests were conducted to determine the in-plane stiffnesses and individual layer elastic properties. The experimental buckling loads were from 67 to 90% of predicted values for loading without torsion. The bending buckling stress was, for all practical purposes, equal to the axial buckling stress and the combined bending with uniform axial load interaction was essentially linear. The experimental torsion buckling loads were greater than the predicted values but the boundary conditions were not considered in the analysis. Buckling loads were computed for boron filament wound cylinders of the same size and winding configurations. These computations show that the buckling loads of boron and aluminum cylinders, of the same size, are nearly equal. A similar comparison on a weight basis would produce the same result since their densities are essentially equal.
Author: Frederick I. Ordway Publisher: Academic Press ISBN: 1483224694 Category : Technology & Engineering Languages : en Pages : 413
Book Description
Advances in Space Science and Technology, Volume 8 presents the possibility that what is recognized as lunar cratering was caused by endogenous, volcanic activity rather than by the more widely accepted meteoritic impact mechanism. This book provides an introduction to the technology of rocketry. Organized into four chapters, this volume begins with an overview of lunar volcanism and the interpretation of the widespread phenomenon of cratering. This text then provides a comprehensive examination of one of the major components of the solid propellant rocket. Other chapters consider the many problems associated with design, construction, and testing of motor cases of the solid propellant rocket. This book presents as well a thorough examination of interplanetary mission planning covering such vital elements as the process of mission decision making based on model theory. The final chapter deals with the exploration of the planet Mars. This book is a valuable resource for geoscientists, astronomers, and geologists.
Author: L. David Wall (Jr.) Publisher: ISBN: Category : Fibrous composites Languages : en Pages : 52
Book Description
Results are presented from torsion tests conducted on 36 multilayered, filament-wound, glass-epoxy tubes. Configurations with helical windings and with alternating helical and circumferential windings were investigated for various winding angles. Under small loadings, shear moduli deduced from linear shear stress-strain curves were found to be in reasonable agreement with analytical predictions. Under larger loadings, various degrees of nonlinearity in shear stress-strain curves were encountered, depending on the helical winding angle. Experimental torsional strengths were defined by a 0.2 -percent offset yield stress or by maximum stress when large nonlinearities did not exist. These strengths were compared with torsional buckling predictions for orthotropic cylinders, and with material strength predictions based on orthotropic yield criteria and elastic stress analysis. Computed elastic buckling stresses were considerably higher than the experimental strengths for most of the test specimens except for those with only 30° and 45 [degree] windings. Experimental torsional strengths- were found to correlate with conventional yield predictions if predicted yielding in certain layers were ignored or if unrealistically large transverse tensile and shear strengths of unidirectional laminae were employed in the analysis.
Author: Josef Singer Publisher: John Wiley & Sons ISBN: 0471974501 Category : Technology & Engineering Languages : en Pages : 1140
Book Description
* Edited by Josef Singer, the world's foremost authority on structural buckling. * Time-saving and cost-effective design data for all structural, mechanical, and aerospace engineering researchers.
Author: Qiang Bai Publisher: John Wiley & Sons ISBN: 1119041287 Category : Science Languages : en Pages : 617
Book Description
Written by one of the most well-respected teams of scientists in the area of pipelines, this revolutionary approach offers the engineer working in the energy industry the theory, analysis, and practical applications for applying new materials and modeling to the design and effective use of flexible pipes. Recent changes in the codes for building pipelines has led to a boom in the production of new materials that can be used in flexible pipes. With the use of polymers, steel, and other new materials and variations on existing materials, the construction and, therefore, the installation and operation of flexible pipes is changing and being improved upon all over the world. The authors of this work have written numerous books and papers on these subjects and are some of the most influential authors on flexible pipes in the world, contributing much of the literature on this subject to the industry. This new volume is a presentation of some of the most cutting-edge technological advances in technical publishing. This is the most comprehensive and in-depth book on this subject, covering not just the various materials and their aspects that make them different, but every process that goes into their installation, operation, and design. The thirty-six chapters, divided up into four different parts, have had not just the authors of this text but literally dozens of other engineers who are some of the world's leading scientists in this area contribute to the work. This is the future of pipelines, and it is an important breakthrough. A must-have for the veteran engineer and student alike, this volume is an important new advancement in the energy industry, a strong link in the chain of the world's energy production.
Author: A. Holston (Jr.)
Author: A. Holston (Jr.)
Author: 
Author: Frederick I. Ordway
Author: L. David Wall (Jr.)
Author: 
Author: J. Tasi
Author: Josef Singer
Author: Qiang Bai
Author: 
Author: Defense Documentation Center (U.S.)