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The Influence Of Moisture Content And Thermal Modification On Wood Fracture
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Book Synopsis ǂThe ǂinfluence of Moisture Content and Thermal Modification on Wood Fracture by : Tom Argensse
Download or read book ǂThe ǂinfluence of Moisture Content and Thermal Modification on Wood Fracture written by Tom Argensse and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wood is a great potential material in various fields of use in terms of exploitation, properties and availability. Its mechanical characteristics linked to its low weight make it a preferred material in the construction field. However, its water sensitivity tends to limit its use and leads to high maintenance costs and treatments. Different methods for the thermal and hydrous modification of wood have been developed in Europe since the middle of the last century. The common objective to these modification methods is to improve dimensional stability and biological durability without adding any toxic chemicals. At the same time, other earlier experiments show that heat-treatment reduces the equilibrium moisture content and slows down the water absorption of wood. Mechanics of materials theory and the concepts of stress and strain that it introduces have been at the foundation of structural engineering for hundreds of years. Fracture mechanics is a series of models used to describe the influence of cracks and defects on material behaviour. They impact and defines the strength of a material more than any other single feature, and wood is no exception. This report regroups a bibliography and research on wood general structure and properties, Thermo-Hydro-Mechanical processes to improve wood properties and fracture mechanics to have a basic knowledge on the influence of moisture content and thermal modification on wood fracture.
Book Synopsis Wood Modification Technologies by : Dick Sandberg
Download or read book Wood Modification Technologies written by Dick Sandberg and published by CRC Press. This book was released on 2021-07-15 with total page 765 pages. Available in PDF, EPUB and Kindle. Book excerpt: The market for durable products using modified wood has increased substantially during the last few years. This is partly because of the restriction on the use of toxic preservatives due to environmental concerns, and to lower maintenance cost and time. Furthermore, as sustainability becomes a greater concern, the environmental impact of construction and interior materials is factored in planning by considering the whole life cycle and embodied energy of the materials used. Wood is modified to improve its intrinsic properties, enhance the range of applications of timber, and to acquire the form and functionality desired by engineers without calling the environmental friendliness into question. Wood modification processes are at various stages of development, and the challenges faced in scaling up to industrial applications differ. The aim of this book is to put together the key elements of the changes of wood constituents and the related changes in wood properties of modified wood. Further, a selection of the principal technologies implemented in wood modification are presented. This work is intended for researchers, professionals of timber construction, as well as students studying the science of materials, civil engineering and architecture. This work is not exhaustive, but intends to deliver an outline of the scientific disciplines necessary to apprehend the technologies of wood modification and its behavior during treatment, as well as during its use.
Book Synopsis Effects of Temperature and Moisture Content on the Tangential Shrinkage and Stress-strain Behavior of Wood, and Their Relation to Drying by : Emmanuel D. Bello
Download or read book Effects of Temperature and Moisture Content on the Tangential Shrinkage and Stress-strain Behavior of Wood, and Their Relation to Drying written by Emmanuel D. Bello and published by . This book was released on 1972 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wood Modification Technologies by : Dick Sandberg
Download or read book Wood Modification Technologies written by Dick Sandberg and published by CRC Press. This book was released on 2021-07-14 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes how to Improvement of wood products Describes Sustainable development Covers Environmental industrial processing
Book Synopsis The Effect of Temperature and Moisture Content on Physical Changes in Wood by : J. F. Siau
Download or read book The Effect of Temperature and Moisture Content on Physical Changes in Wood written by J. F. Siau and published by . This book was released on 1979 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical conductivity is extremely sensitive to changes in moisture content and temperature. The influence of moisture content and specific gravity on thermal conductivity and moisture movement are discussed with the use of a cellular geometrical model for wood. The use of alternate gradients in Fick's law for the calculation of unsteady-state and steady-state moisture movement are considered. The effect of moisture on wood permeability is described. (Author).
Book Synopsis Effect of Moisture Content and Temperature on the Mechanical Properties of Wood by : Charles C. Gerhards
Download or read book Effect of Moisture Content and Temperature on the Mechanical Properties of Wood written by Charles C. Gerhards and published by . This book was released on 1980 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wood Modification by : Callum A. S. Hill
Download or read book Wood Modification written by Callum A. S. Hill and published by John Wiley & Sons. This book was released on 2007-02-06 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is exclusively concerned with wood modification, although many of these processes are generic and can be applied to other lignocellulosic materials. There have been many rapid developments in wood modification over the past decade and, in particular, there has been considerable progress made in the commercialisation of technologies. Topics covered include: The use of timber in the 21st century Modifying the properties of wood Chemical modification of wood: Acetic Anhydride Modification and reaction with other chemicals Thermal modification of wood Surface modification Impregnation modification Commercialisation of wood modification Environmental consideration and future developments This is the first time that a book has covered all wood modification technologies in one text. Although the book covers the main research developments in wood modification, it also puts wood modification into context and additionally deals with aspects of commercialisation and environmental impact. This book is very timely, because wood modification is undergoing huge developments at the present time, driven in part by environmental concerns regarding the use of wood treated with certain preservatives. There has been considerable commercial interest shown in wood modification over the past decade, with products based upon thermal modification, and furfurylation now being actively being marketed. The next few years will see the commercialisation of acetylation and impregnation modification. This is a new industry, but one that has enormous potential. This book will prove useful to all those with an interest in wood modification including researchers, technologists and professionals working in wood science and timber engineering, wood preservation, and well as professionals in the paper and pulp industries, and those with an interest in the development of renewable materials.
Book Synopsis Impact of process conditions in open and closed reactor systems on the properties of thermally modified wood by : Michael Altgen
Download or read book Impact of process conditions in open and closed reactor systems on the properties of thermally modified wood written by Michael Altgen and published by Cuvillier Verlag. This book was released on 2016-12-05 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various thermal wood modification technologies have been developed in Europe during the past decades that differ notably in the process conditions applied. However, the changes in wood properties by thermal modification, the underlying modes of action and their link to the process conditions are still not fully understood. This thesis investigates the influence of different process conditions in open and closed reactor systems on the resulting properties of thermally modified wood. In closed reactor systems, elevated water vapor pressure accelerates the thermal degradation of wood polymers and results in high mass loss levels even at mild treatment temperatures. However, in addition to the loss in wood mass, a strong influence of drying and softening of wood at elevated temperatures as well as an increased cell wall matrix stiffness by modification of the lignin carbohydrate complex under dry heat conditions influences the wood properties, i.e. water sorption. For wood thermally modified in open reactor systems at different peak temperatures and durations, the surface performance is investigated with regard to the susceptibility to surface cracking, photodegradation and coatability. The results provide explanations why the performance of thermally modified wood in exterior applications does not always meet the expectations derived from its enhanced resistance against decay fungi.
Book Synopsis Effect of Moisture Content on Linear Thermal Expansion of Wood by : Li-Pang Sam Chang
Download or read book Effect of Moisture Content on Linear Thermal Expansion of Wood written by Li-Pang Sam Chang and published by . This book was released on 1973 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shrinkage Failure of Wood as Influenced by Temperature and Moisture Content by : John David Irwin
Download or read book Shrinkage Failure of Wood as Influenced by Temperature and Moisture Content written by John David Irwin and published by . This book was released on 1957 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Delamination in Wood, Wood Products and Wood-Based Composites by : Voichita Bucur
Download or read book Delamination in Wood, Wood Products and Wood-Based Composites written by Voichita Bucur and published by Springer Science & Business Media. This book was released on 2010-11-02 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last quarter century, delamination has come to mean more than just a failure in adhesion between layers of bonded composite plies that might affect their load-bearing capacity. Ever-increasing computer power has meant that we can now detect and analyze delamination between, for example, cell walls in solid wood. This fast-moving and critically important field of study is covered in a book that provides everyone from manufacturers to research scientists the state of the art in wood delamination studies. Divided into three sections, the book first details the general aspects of the subject, from basic information including terminology, to the theoretical basis for the evaluation of delamination. A settled terminology in this subject area is a first key goal of the book, as the terms which describe delamination in wood and wood-based composites are numerous and often confusing. The second section examines different and highly specialized methods for delamination detection such as confocal laser scanning microscopy, light microscopy, scanning electron microscopy and ultrasonics. Ways in which NDE (non-destructive evaluation) can be employed to detect and locate defects are also covered. The book’s final section focuses on the practical aspects of this defect in a wide range of wood products covering the spectrum from trees, logs, laminated panels and glued laminated timbers to parquet floors. Intended as a primary reference, this book covers everything from the microscopic, anatomical level of delamination within solid wood sections to an examination of the interface of wood and its surface coatings. It provides readers with the perspective of industry as well as laboratory and is thus a highly practical sourcebook for wood engineers working in manufacturing as well as a comprehensively referenced text for materials scientists wrestling with the theory underlying the subject.
Book Synopsis Thermo-Hydro-Mechanical Wood Processing by : Parvis Navi
Download or read book Thermo-Hydro-Mechanical Wood Processing written by Parvis Navi and published by CRC Press. This book was released on 2012-02-07 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing the history and state-of-the-art of the thermo-hydrous manipulation of wood, this book provides either a desk reference or a field manual of wood science. It examines the polymeric components of wood and its multilevel hierarchical structure that confer its unique general-purpose character and faculty for transformation. Exceeding all other material in its capacity to deform under controlled conditions and for a proscribed outcome, wood, under thermo-hydrous conditions, permits a multitude of industrial processes. Discussing the processes at work and the industrial applications, this book is a must for all interested in the manipulation of wood.
Book Synopsis The Effect of Treating Pressure, Solution Temperature, and Wood Moisture Content on the Moduli of Rupture and Elasticity of Douglas Fir by : James Arthur Whittington
Download or read book The Effect of Treating Pressure, Solution Temperature, and Wood Moisture Content on the Moduli of Rupture and Elasticity of Douglas Fir written by James Arthur Whittington and published by . This book was released on 1967 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Damp Indoor Spaces and Health by : Institute of Medicine
Download or read book Damp Indoor Spaces and Health written by Institute of Medicine and published by National Academies Press. This book was released on 2004-10-01 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Almost all homes, apartments, and commercial buildings will experience leaks, flooding, or other forms of excessive indoor dampness at some point. Not only is excessive dampness a health problem by itself, it also contributes to several other potentially problematic types of situations. Molds and other microbial agents favor damp indoor environments, and excess moisture may initiate the release of chemical emissions from damaged building materials and furnishings. This new book from the Institute of Medicine examines the health impact of exposures resulting from damp indoor environments and offers recommendations for public health interventions. Damp Indoor Spaces and Health covers a broad range of topics. The book not only examines the relationship between damp or moldy indoor environments and adverse health outcomes but also discusses how and where buildings get wet, how dampness influences microbial growth and chemical emissions, ways to prevent and remediate dampness, and elements of a public health response to the issues. A comprehensive literature review finds sufficient evidence of an association between damp indoor environments and some upper respiratory tract symptoms, coughing, wheezing, and asthma symptoms in sensitized persons. This important book will be of interest to a wide-ranging audience of science, health, engineering, and building professionals, government officials, and members of the public.
Book Synopsis Influence of Moisture Content on the Long-term Strength of Wood by : Yu. M. Ivanov
Download or read book Influence of Moisture Content on the Long-term Strength of Wood written by Yu. M. Ivanov and published by . This book was released on with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Wood Science and Technology by : Franz F.P. Kollmann
Download or read book Principles of Wood Science and Technology written by Franz F.P. Kollmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern forest products research had its start hardly fifty years ago. Today we are in a position to apply the title "wood science" to the field of wood technology that is based on scientific investigation, theoretical as well as experimental. It is this research that fosters new uses for wood as a raw material and that creates the foundation for new industries for the manufacture of wood-base materials such as plywood, laminated products, particle and fiber board and sand wich construction. Wood technology in its broadest sense combines the disciplines of wood anatomy, biology, chemistry, physics and mechanical technology. It is through this interdisciplinary approach that progress has been made in wood seasoning, wood preservation methods, wood machining, surfacing and gluing, and in the many other processes applied in its utilization. In 1936 the senior author published a book entitled, "Technologie des Holzes", which was a first approach to a universal reference book on wood technology. The first edition of Volume I of the Textbook of Wood Technology, co-authored by H. P. BROWN, A. J. P AN SHIN , and C. C. FORSAITH, was published in 1948. An indication of the rapid development of this field can be gained from the fact that the second edition of "Technologie des Holzes und der Holzwerkstoffe", completely revised, was needed by 1951. It contains 2233 pages compared with the 764 pages of the 1936 edition.
Book Synopsis The Influence of Checks on the Fracture of Wood Perpendicular to the Grain by : Richard Arthur Pozniak
Download or read book The Influence of Checks on the Fracture of Wood Perpendicular to the Grain written by Richard Arthur Pozniak and published by . This book was released on 1966 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
