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The Mechanical Properties of Wood by Samuel J. Record Pdf
DigiCat Publishing presents to you this special edition of "The Mechanical Properties of Wood" (Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing) by Samuel J. Record. DigiCat Publishing considers every written word to be a legacy of humankind. Every DigiCat book has been carefully reproduced for republishing in a new modern format. The books are available in print, as well as ebooks. DigiCat hopes you will treat this work with the acknowledgment and passion it deserves as a classic of world literature.
Author : Samuel J. Record Publisher : Rarebooksclub.com Page : 114 pages File Size : 52,5 Mb Release : 2012-08-01 Category : House & Home ISBN : 1770457674
The Mechanical Properties of Wood by Samuel J. Record Pdf
Excerpt: ... used only for tension and cleavage tests, consists of a steel cage above the movable crosshead and rests directly upon the weighing platform. The top of the cage contains a square hole into which one end of the test specimen may be clamped, the crosshead containing a similar clamp for the other end, in making tension tests. For testing long beams a special form of machine with an extended platform is used. (See Fig. 29 .) The weighing platform rests upon knife edges carried by primary levers of the weighing apparatus, the fulcrum being on the bed of the machine, and any pressure upon it is directly transmitted through a series of levers to the weighing beam. This beam is adjusted by means of a poise running on a screw. In operation the beam is kept floating by means of another poise moved back and forth by a screw which is operated by a hand wheel or automatically. The larger units of stress are read from the graduations along the side of the beam, while the intermediate smaller weights are observed on the dial on the rear end of the beam. The machine is driven by power from a shaft or a motor and is so geared that various speeds are obtainable. One man can operate it. In making tests the operation of the straining screws is always downward so as to bring pressure to bear upon the weighing platform. For tests in tension and cleavage the specimen is placed between the top of the stationary cage and the movable head and subjected to a pull. For tests in transverse bending, compression, and cleavage the specimen is placed between the movable head and the platform, and a direct compression force applied. Testing machines are usually calibrated to a portion of their capacity before leaving the factory. The delicacy of the weighing levers is verified by determining the number of pounds necessary to move the beam between the stops while a load of 1,000 pounds rests on the platform. The usual requirement is that ten pounds should accomplish this movement....
Wood-based materials are CO2-neutral, renewable, and considered to be environmentally friendly. The huge variety of wood species and wood-based composites allows a wide scope of creative and esthetic alternatives to materials with higher environmental impacts during production, use and disposal. Quality of wood is influenced by the genetic and environmental factors. One of the emerging uses of wood are building and construction applications. Modern building and construction practices would not be possible without use of wood or wood-based composites. The use of composites enables using wood of lower quality for the production of materials with engineered properties for specific target applications. Even more, the utilization of such reinforcing particles as carbon nanotubes and nanocellulose enables development of a new generation of composites with even better properties. The positive aspect of decomposability of waste wood can turn into the opposite when wood or wood-based materials are exposed to weathering, moisture oscillations, different discolorations, and degrading organisms. Protective measures are therefore unavoidable for many outdoor applications. Resistance of wood against different aging factors is always a combined effect of toxic or inhibiting ingredients on the one hand, and of structural, anatomical, or chemical ways of excluding moisture on the other.
The Mechanical Properties of Wood, Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing by Samuel James Record Pdf
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
The Mechanical Properties of Wood by Samuel J. Record Pdf
This book was written primarily for students of forestry to whom a knowledge of the technical properties of wood is essential. The mechanics involved is reduced to the simplest terms and without reference to higher mathematics, with which the students rarely are familiar. The intention throughout has been to avoid all unnecessarily technical language and descriptions, thereby making the subject-matter readily available to every one interested in wood. Part I is devoted to a discussion of the mechanical properties of wood-the relation of wood material to stresses and strains. Much of the subject-matter is merely elementary mechanics of materials in general, though written with reference to wood in particular. Numerous tables are included, showing the various strength values of many of the more important American woods. Part II deals with the factors affecting the mechanical properties of wood. This is a subject of interest to all who are concerned in the rational use of wood, and to the forester it also, by retrospection, suggests ways and means of regulating his forest product through control of the conditions of production. Attempt has been made, in the light of all data at hand, to answer many moot questions, such as the effect on the quality of wood of rate of growth, season of cutting, heartwood and sapwood, locality of growth, weight, water content, steaming, and defects.
Pergamon Series of Monographs on Furniture and Timber, Volume 8: Timber: Its Mechanical Properties and Factors Affecting its Structural Use focuses on the mechanical and technical properties of timber, including how a tree grows and develops. This book discusses the growth of the tree, structure of wood, fundamental properties, factors affecting strength, structural grading, and seasoning. The strength properties, assessing strength properties, and testing for strength are also covered. The strength of wood varies almost with every species and factors affecting this in relation to working stresses are fully indicated in this text. This publication is intended as an introductory textbook on the mechanical and technical properties of wood, and as such, will be useful to students, architects, builders, and others requiring knowledge on the subject.
The Mechanical Properties of Wood by Samuel James Record Pdf
Excerpt from The Mechanical Properties of Wood: Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing Timber testing Working plan Forms of material tested Size of test specimens Moisture determination Machine for static tests Speed of testing machine Bending large beams Bending small beams Endwise compression Compression across the gram Shear along the grain Impact test Hardness test: Abrasion and indentation Cleavage test Tension test parallel to the grain Tension test at right angles to the grain Torsion test Special tests Spike pulling test Packing boxes Vehicle and implement woods. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The Mechanical Properties of Wood (Classic Reprint) by Frederick F. Wangaard Pdf
Excerpt from The Mechanical Properties of Wood Although intended primarily as a textbook for students of wood technology and forest utilization, this book has been written with the hope that it may also find use as a source of information for others desiring a knowledge of the technical properties of wood. In serving this objective, comprehensive tables presenting fundamental strength and related properties for more than one hundred and fifty American woods as well as tables of recommended basic and working-stress values for structural species have been incorporated in the text. Examples illustrating the derivation and application of stress values are provided. The treatment of certain phases of the text, especially those dealing with factors affecting the strength of wood and with working stresses and the basis for grading rules for structural lumber, has been made as complete as possible in the space available. An attempt has been made to avoid unnecessary technical language and descriptions, so that it may be understood by all those interested in wood. The preparation of this book was suggested by Dean George A. Garratt whose work of the same title, published in 1931, is well known in the field of wood technology. Although the present publication is based on Garratt's Mechanical Properties of Wood, subsequent developments in timber mechanics and timber engineering and the increase in knowledge relating to the effects of various factors on the properties of wood have necessitated extensive revision. The arrangement and method of treatment of its predecessor are retained, but the presentation of much of the subject matter is entirely new. Part 1 deals with stress and strain relationships of wood, an appreciation of which is essential to an understanding of its mechanical behavior. Much of the discussion in this section is elementary mechanics of materials in general, although it is written with special reference to wood. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The Mechanical Properties of Wood, Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing, (Fully Il by Samuel J. Record Pdf
"The Mechanical Properties of Wood" (fully illustrated) was written primarily for students of forestry to whom a knowledge of the technical properties of wood is essential. The mechanics involved is reduced to the simplest terms and without reference to higher mathematics, with which the students rarely are familiar. The intention throughout has been to avoid all unnecessarily technical language and descriptions, thereby making the subject-matter readily available to every one interested in wood.
