Wood: A Versatile Engineering Material
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Transcript of Wood: A Versatile Engineering Material
11/04/23Hugh Mullan1
WoodWoodA versatile engineering material
By Hugh Mullan
BSFTL, SMCIOB
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Todays LectureTodays Lecture
Definition of ‘versatile’Is wood versatile?Why so?Definition of an ‘engineering material’Wood as an engineering materialTo sum up
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VersatileVersatile
Turning easily from one thing to anotherOf many sided abilityCapable of many uses
The Chambers Dictionary, © 2003, Chambers Harrap Publishers Ltd.
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Is wood versatile?Is wood versatile?
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Turning easily from one thing to Turning easily from one thing to anotheranotherTimber does not require
energy intensive processing The product energy
requirement, in kilowatt hours, is 8 times higher for a PVC-U window compared to a timber window
The manufacture of steel components uses 4,000 times more energy than its timber equivalent
Concrete creates 5 times as much solid waste
Timber is inherently recyclable
www.forestsforever .org.uk
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Large and small structuresLarge and small structuresCapable of many usesCapable of many uses
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Where is wood usedWhere is wood usedMany sided abilityMany sided ability
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Why is wood versatile?Why is wood versatile?
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An engineering materialAn engineering material
Engineering: ‘… in its modern and extended sense, the art and science by which the mechanical properties of matter are made useful to man in structures and machines…’
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Mechanical Properties of woodMechanical Properties of wood
A light construction material with a high strength to weight ratio
Relatively easy to work with simple tools.“Anisotropic / Orthotropic”“Unidirectional”Natural and therefore may be susceptible
to biodeterioration
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Specific mecanial propertiesSpecific mecanial properties
Is wood a material?How strong is it?How heavy is it?How elastic or rigid is it?How stable?How durable?
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A set or range of materialsA set or range of materials
Mechanical properties variable by SpeciesTypeGrowth regime and geographyLocation within a single treeProcessing at all stagesManufactured wood products
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A range of materialsA range of materials
Different species suitable for different applications
Manufacured wood products extend the range of applications
Treatment can do this alsoSuitability not exclusive
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Manufactured wood productsManufactured wood products
Between half and two thirds of all solid timber goes to waste during the sawing and dimensioning process.
Manufactured wood products make use of timber waste and so represent an efficient use of resources.
Eco, © 2005 Quadrille Publishing Ltd.
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To sum upTo sum up
Wood is extremely versatile and continues to be one of the most widely used materials, often in combination with metals, plastics, glass or other materials (furniture, construction). The processing of wood (sawn timber, veneer, boards), its manufacture into finished products (structural components, wooden units, furniture, wooden products) and use, above all in the chemical industry (cellulose, paper, fibreboard), have resulted in the development of wood specialist training in the fields of industrial engineering and materials engineering.
Source: www.studienwahl.de
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Further InformationFurther Information
Forests Forever: www.forests forever.co.uk Forest Stewardship Council: www.fsc-
uk.demon.co.uk Building Research Establishment:
www.bre.co.uk/timber Wood Web: www.woodweb.com Softwood Export Council: www.softwood.org