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Descripción
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| Mechanical properties of timber can be estimated from wave propagation velocity by measuring the wave time of flight. A time lag is observed in wave time of flight depending on the species-knottiness and device, usually obtained by end to end measurements at different distances. The aim of this research is the determination of that time lag by means of in situ time of flight measurements. Ultrasound wave transmission time was measured in 30 pieces of Spanish Scots pine (Pinus sylvestris L.), 90 by 140 mm cross-section size and 4 m long. Different sensor placement arrangements were used: direct measurement (end to end), surface measurement (edge to same edge and face to same face) and crossed measurements (edge to opposite edge and face to opposite face). The pieces were successively shortened to 3, 2 and 1 m, establishing a linear regression between measuring distance and time of flight obtaining the time lag. Surface and crossed measurements were compared with direct measurement, in order to validate the time lag procedure. | |
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Internacional
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Si |
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Nombre congreso
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World Conference on Timber Engineering |
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Tipo de participación
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960 |
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Lugar del congreso
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Vienna, Austria |
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Revisores
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No |
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ISBN o ISSN
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978-3-903039-00-1 |
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DOI
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Fecha inicio congreso
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22/08/2016 |
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Fecha fin congreso
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25/08/2016 |
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Desde la página
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951 |
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Hasta la página
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958 |
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Título de las actas
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Proceedings of the World Conference on Timber Engineering, WCTE 2016 |