Download or read book Buckling and Crippling of Square Steel Thin walled Tubes Fabricated with Symmetrically overlapping U channels and Foam written by David Camenish Gelder and published by . This book was released on 2012 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Testing and analysis has been performed on square steel thin-walled tubes fabricated using symmetrically-overlapping U-channels and foam. This research analyzes flange-to-flange attachment, effect of foam in the columns, effect of adhesive stiffness, and influence of steel thickness, as related to the local buckling loads, global buckling loads, and crippling loads. Four 14-foot (4.27 m) foam-filled, thin-walled, galvanized steel columns were manufactured by Novatek, Inc. and tested in axial compression with pinned boundary conditions. For three of the four configurations, the two-piece 4-in. (10.2-cm) square shell surrounded prefabricated polystyrene foam inserts; the fourth column had no foam insert. The column outer shells were composed of two 16-gauge galvanized steel channels with overlapping flanges and the webs on opposite sides of the column. The two adjacent flanges on each side of the columns were adhesively bonded together in all cases. In addition to the adhesive, two columns had either periodic screws or short welds spaced evenly along the length of the columns to delay the onset of flange buckling of the outer channel, and potentially increase the compression strength. The other two columns had adhesive only bonding the flanges, one of which had no foam filler. The various configurations all exhibited similar compression strengths. Failure for all columns initiated with local buckling, followed by global buckling and local crippling, which occurred simultaneously. The method of flange attachment, the effect of the foam in the columns, and flange thicknesses were isolated and analyzed using mechanics-based analysis, parametric studies, and finite element analysis. The results show the ideal spacing of screws or short-welds, if used, is less than or equal to 5 in (12.7 cm) for the given column length. This increases the local buckling load to the Euler buckling load and preserves the original shape of the cross-section. The adhesive needs only a tensile strength of approximately 1 ksi (6.4 kPa) to prevent local buckling for any spacing of screws or short-welds, but needs to be applied uniformly (much of the adhesive in the column tests had been scraped off of the flanges during assembly). The results also show that foam core does not increase the Euler buckling load, but does increase the crippling load by delaying inward buckling of the column webs and flanges. Using foam with the given stiffness and a yield strength of 50 psi (345 kPa), uniform foam-to-steel bonding could increase the crippling strength up to 21% even without adhesive between the flanges. Using adhesive with the given stiffness between the flanges could increase the crippling strength by up to 63% without foam. The crippling strength could increase up to 72% if both adhesive between the flanges and a foam insert are used.
Download or read book Finite Element and Experimental Studies of Buckling of Laminated Thin wall Structures written by Cheng Wang and published by . This book was released on 1986 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: The buckling and postbuckling behavior of laminated non-coplanar thin-walled structures have been investigated in the present study. A 32 degree-of-freedom assumed stress hybrid semiLoof finite element has been developed and utilized as the analytical tool. Based on the new balanced stress and displacement fields technique, an optimal stress pattern for the element model has been obtained. The programs for the buckling and postbuckling analysis have been separately made by using the new element model. For some standard problems and for the prediction of the buckling and postbuckling behavior of channels and square tubes, the analysis gives good results. The experimental program consisted of the testing of four kinds of specimens: channels, tubes, stiffened plates and stiffened sections. The results show that the postbuckling behavior of those specimens is not sensitive to slight initial imperfections but the prebuckling region is greatly affected. The square tubes with unsymmetric layups showed no initial deflection before the buckling load, which indicated that the square tube arrangement overcomes the unsymmetric elastic coupling effects in each individual side, i.e., the B matrix effects can be neglected effectively for the square tube arrangement. From the results of tube specimens it has been identified that the ratio of D11 /D22 plays a significant role in the determination of the deflection mode shapes, while the value of the buckling load is dominated by the parameters D22 and D66. The channels and square tubes failed by pii delamination at the corners due to stress concentrations and large out-of-plane deflection, while the failure of the stiffened plates and the stiffened sections were first caused by delamination of the base-plate from the square tube core of the stiffeners and covering face-sheet, and finally completed by ply delamination at the stiffener corners.
Download or read book Fibrous Composites in Structural Design written by Edward M. Lenoe and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fourth Conference on Fibrous Composites in Structural Design was a successor to the First-to-Third Conferences on Fibrous Composites in Flight Vehicle Design sponsored by the Air Force (First and Second Conferences, September 1973 and May 1974) and by NASA (Third Conference, November 1975) which were aimed at focusing national attention on flight vehicle applications of a new class of fiber reinforced materials, the advanced com posites, which afforded weight savings and other advantages which had not been previously available. The Fourth Conference, held at San Diego, California, 14-17 November 1978, was the fi rst of these conferences to be jointly sponsored by the Army, Navy and Ai r Force together with NASA, as well as being the first to give attention to non-aerospace applications of fiber reinforced composites. While the design technology for aerospace applications has reached a state of relative maturity, other areas of application such as mi litary bridging, flywheel energy storage systems, ship and surface vessel components and ground vehicle components are in an early stage of development, and it was an important objective to pinpoint where careful attention to structural design was needed in such applications to achfeve maximum structural performance payoff together with a high level of reliability and attractive economics.
Download or read book Aircraft Structures for Engineering Students written by Thomas Henry Gordon Megson and published by . This book was released on 1977 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Disappearing Spoon written by Sam Kean and published by Little, Brown. This book was released on 2010-07-12 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: From New York Times bestselling author Sam Kean comes incredible stories of science, history, finance, mythology, the arts, medicine, and more, as told by the Periodic Table. Why did Gandhi hate iodine (I, 53)? How did radium (Ra, 88) nearly ruin Marie Curie's reputation? And why is gallium (Ga, 31) the go-to element for laboratory pranksters? The Periodic Table is a crowning scientific achievement, but it's also a treasure trove of adventure, betrayal, and obsession. These fascinating tales follow every element on the table as they play out their parts in human history, and in the lives of the (frequently) mad scientists who discovered them. The Disappearing Spoon masterfully fuses science with the classic lore of invention, investigation, and discovery -- from the Big Bang through the end of time. Though solid at room temperature, gallium is a moldable metal that melts at 84 degrees Fahrenheit. A classic science prank is to mold gallium spoons, serve them with tea, and watch guests recoil as their utensils disappear.
Download or read book Insights and Innovations in Structural Engineering Mechanics and Computation written by Alphose Zingoni and published by CRC Press. This book was released on 2016-11-25 with total page 2223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insights and Innovations in Structural Engineering, Mechanics and Computation comprises 360 papers that were presented at the Sixth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2016, Cape Town, South Africa, 5-7 September 2016). The papers reflect the broad scope of the SEMC conferences, and cover a wide range of engineering structures (buildings, bridges, towers, roofs, foundations, offshore structures, tunnels, dams, vessels, vehicles and machinery) and engineering materials (steel, aluminium, concrete, masonry, timber, glass, polymers, composites, laminates, smart materials).
Download or read book Introduction to Aircraft Structural Analysis written by T.H.G. Megson and published by Butterworth-Heinemann. This book was released on 2010-01-16 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Aircraft Structural Analysis is an essential resource for learning aircraft structural analysis. Based on the author's best-selling book Aircraft Structures for Engineering Students, this brief text introduces the reader to the basics of structural analysis as applied to aircraft structures. Coverage of elasticity, energy methods and virtual work sets the stage for discussions of airworthiness/airframe loads and stress analysis of aircraft components. Numerous worked examples, illustrations, and sample problems show how to apply the concepts to realistic situations. The book covers the core concepts in about 200 fewer pages by removing some optional topics like structural vibrations and aero elasticity. It consists of 23 chapters covering a variety of topics from basic elasticity to torsion of solid sections; energy methods; matrix methods; bending of thin plates; structural components of aircraft; airworthiness; airframe loads; bending of open, closed, and thin walled beams; combined open and closed section beams; wing spars and box beams; and fuselage frames and wing ribs. This book will appeal to undergraduate and postgraduate students of aerospace and aeronautical engineering, as well as professional development and training courses. Based on the author's best-selling text Aircraft Structures for Engineering Students, this Intro version covers the core concepts in about 200 fewer pages by removing some optional topics like structural vibrations and aeroelasticity Systematic step by step procedures in the worked examples Self-contained, with complete derivations for key equations
Download or read book Certification of Normal Category Rotorcraft written by United States. Federal Aviation Administration and published by . This book was released on 1985 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Structural Engineering written by W.F. Chen and published by CRC Press. This book was released on 2005-02-28 with total page 1765 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing the best-selling tradition of the Handbook of Structural Engineering, this second edition is a comprehensive reference to the broad spectrum of structural engineering, encapsulating the theoretical, practical, and computational aspects of the field. The contributors cover traditional and innovative approaches to analysis, design, and rehabilitation. New topics include: fundamental theories of structural dynamics; advanced analysis; wind- and earthquake-resistant design; design of prestressed structures; high-performance steel, concrete, and fiber-reinforced polymers; semirigid frame structures; structural bracing; and structural design for fire safety.
Download or read book Admiralty Manual of Seamanship written by Great Britain. Admiralty and published by . This book was released on 1964 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Building Structures written by James Ambrose and published by John Wiley & Sons. This book was released on 2011-10-18 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: The comprehensive reference on the basics of structural analysis and design, now updated with the latest considerations of building technology Structural design is an essential element of the building process, yet one of the most difficult to learn. While structural engineers do the detailed consulting work for a building project, architects need to know enough structural theory and analysis to design a building. Most texts on structures for architects focus narrowly on the mathematical analysis of isolated structural components, yet Building Structures looks at the general concepts with selected computations to understand the role of the structure as a building subsystem—without the complicated mathematics. New to this edition is a complete discussion of the LRFD method of design, supplemented by the ASD method, in addition to: The fundamentals of structural analysis and design for architects A glossary, exercise problems, and a companion website and instructor's manual Material ideally suited for preparing for the ARE exam Profusely illustrated throughout with drawings and photographs, and including new case studies, Building Structures, Third Edition is perfect for nonengineers to understand and visualize structural design.
Download or read book Structural Steel Designers Handbook written by Frederick S. Merritt and published by McGraw-Hill Companies. This book was released on 1972 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Joy of Science written by Richard A. Lockshin and published by Springer Science & Business Media. This book was released on 2007-11-05 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reveals that scientific logic is an extension of common, everyday logic and that it can and should be understood by everyone. Written by a practicing and successful scientist, it explores why questions arise in science and looks at how questions are tackled, what constitutes a valid answer, and why. The author does not bog the reader down in technical details or lists of facts to memorize. He uses accessible examples, illustrations, and descriptions to address complex issues. The book should prove enlightening to anyone who has been perplexed by the meaning, relevance, and moral or political implications of science.
Download or read book Structural Steel Design written by Abi O. Aghayere and published by Mercury Learning and Information. This book was released on 2020-01-23 with total page 1363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Steel Design, Third Edition is a simple, practical, and concise guide to structural steel design – using the Load and Resistance Factor Design (LRFD) and the Allowable Strength Design (ASD) methods -- that equips the reader with the necessary skills for designing real-world structures. Civil, structural, and architectural engineering students intending to pursue careers in structural design and consulting engineering, and practicing structural engineers will find the text useful because of the holistic, project-based learning approach that bridges the gap between engineering education and professional practice. The design of each building component is presented in a way such that the reader can see how each element fits into the entire building design and construction process. Structural details and practical example exercises that realistically mirror what obtains in professional design practice are presented. Features: - Includes updated content/example exercises that conform to the current codes (ASCE 7, ANSI/AISC 360-16, and IBC) - Adds coverage to ASD and examples with ASD to parallel those that are done LRFD - Follows a holistic approach to structural steel design that considers the design of individual steel framing members in the context of a complete structure. Instructor resources are available online by emailing the publisher with proof of class adoption at [email protected].
Download or read book Design of Blast resistant Buildings in Petrochemical Facilities written by Society of Civil Engineers. Task Committee on Blast Resistant Design and published by Amer Society of Civil Engineers. This book was released on 2010 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated edition provides general guidelines for the structural design of blast-resistant petrochemical facilities. Information is provided for U.S. Occupational Safety and Health Administration (OSHA) requirements, design objectives, siting considerations, and load determination, and references cite sources of detailed information. Detailed coverage is provided for types of construction, dynamic material strengths, allowable response criteria, analysis methods, and design procedures. Typical details and ancillary considerations, such as doors and windows, are also included. A how-to discussion on the upgrade of existing buildings is provided for older facilities which may not meet current needs. Three example calculations are included to illustrate design procedures.
Download or read book Ordnance Engineering Design Handbook written by and published by . This book was released on 1968 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earthquake Resistant Design of Structures written by Shashikant K. Duggal and published by OUP India. This book was released on 2013-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquake-resistant Design of Structures 2e is designed for undergraduate students of civil engineering.
