Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica
The laminated curves (LC) made with steamed veneers make possible to obtain smaller curvature radius (RC) than when this process is not applied. This research shows the behavior of Alnus acuminata, Tectona grandis, Gmelina arborea, Terminalia oblonga and Swietenia macrophylla –all originated from fa...
| Main Authors: | , , |
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| Format: | Online |
| Language: | spa |
| Published: |
Instituto de Ecología, A.C.
2016
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| Online Access: | https://myb.ojs.inecol.mx/index.php/myb/article/view/1150 |
| _version_ | 1799769211126415360 |
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| author | Shirazinia, Mahyar Moya, Róger Muñoz, Freddy |
| author_facet | Shirazinia, Mahyar Moya, Róger Muñoz, Freddy |
| author_sort | Shirazinia, Mahyar |
| collection | MYB |
| description | The laminated curves (LC) made with steamed veneers make possible to obtain smaller curvature radius (RC) than when this process is not applied. This research shows the behavior of Alnus acuminata, Tectona grandis, Gmelina arborea, Terminalia oblonga and Swietenia macrophylla –all originated from fast growth plantations– in the manufacture of laminated curves with radios of (4, 6, 8, 10, 12 and 14) cm. The results show that it was possible to reach RC of 4 cm in all species except for T. grandis in which it was only possible to reach RC of 6 cm. The steam process increased the moisture content of the veneer in a range from 3,3% to 10,2%. The adhesive makes possible that bondline for RC smaller than 10 cm do not open, while for RC of 12 and 14 cm the bondline tends to get open (1% as maximum) for all the species. Nevertheless, the bondline opening gets stabilized 4 days after it is fabricated. The veneer deliminations occurred mainly in the interval of RC from 4 to 8 cm. The highest delaminations values take place in the T. grandis and T. oblonga. The shear stress values varied from 7,5 MPa to 11,2 MPa in all tested species. The aging test of adhesive did not alter significantly the shear stress, but delaminating due to the failure of the bondline increased in all species. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-1150 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-11502022-11-30T00:11:58Z Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica Propiedades de curvas laminadas construidas con chapas vaporizadas con maderas de árboles de plantaciones de rápido crecimiento Shirazinia, Mahyar Moya, Róger Muñoz, Freddy Laminated curves delamination steamed veneers shear stress curvature radius Curvas laminadas delaminación chapas vaporizadas cizallamiento radio de curvatura The laminated curves (LC) made with steamed veneers make possible to obtain smaller curvature radius (RC) than when this process is not applied. This research shows the behavior of Alnus acuminata, Tectona grandis, Gmelina arborea, Terminalia oblonga and Swietenia macrophylla –all originated from fast growth plantations– in the manufacture of laminated curves with radios of (4, 6, 8, 10, 12 and 14) cm. The results show that it was possible to reach RC of 4 cm in all species except for T. grandis in which it was only possible to reach RC of 6 cm. The steam process increased the moisture content of the veneer in a range from 3,3% to 10,2%. The adhesive makes possible that bondline for RC smaller than 10 cm do not open, while for RC of 12 and 14 cm the bondline tends to get open (1% as maximum) for all the species. Nevertheless, the bondline opening gets stabilized 4 days after it is fabricated. The veneer deliminations occurred mainly in the interval of RC from 4 to 8 cm. The highest delaminations values take place in the T. grandis and T. oblonga. The shear stress values varied from 7,5 MPa to 11,2 MPa in all tested species. The aging test of adhesive did not alter significantly the shear stress, but delaminating due to the failure of the bondline increased in all species. Las curvas laminadas fabricadas con chapas vaporizadas permiten obtener radios de curvatura más pequeños que cuando no se aplica este proceso. En este estudio, se presentan el comportamiento de madera de Alnus acuminata, Tectona grandis, Gmelina arborea, Terminalia oblonga, Alnus acuminata y Swietenia macrophylla provenientes de plantaciones de rápido crecimiento en la fabricación de curvaturas con radios de (4, 6, 8, 10, 12 y 14) cm. Fue posible obtener radios de curvaturas de 4 cm, a excepción de T. grandis de donde solo fue posible obtener radio de 6 cm. El proceso de vaporizado aumentó el contenido de humedad de la chapa en un rango de 3.3% a 10.2%. El adhesivo permite que el radio de la curva fabricada se mantenga en radios menores a 10 cm y en radios de 12 cm y 14 cm la curva tiende a abrirse (máximo 1%), para todas las especies, no obstante, la abertura se estabiliza al día 4 luego de fabricada. Las delaminaciones de las chapas se producen principalmente en los radios de 4 cm a 8 cm y se presentan con mayor incidente en la T. grandis y T. oblonga. La resistencia en cizallamiento de 7,5 MPa-11,2 MPa y no se alteró al someter a pruebas de envejecimiento, pero hay una mayor delaminación en todas las especies. Instituto de Ecología, A.C. 2016-08-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf https://myb.ojs.inecol.mx/index.php/myb/article/view/1150 10.21829/myb.2011.1721150 Madera y Bosques; Vol. 17 No. 2 (2011): Verano 2011; 85-101 Madera y Bosques; Vol. 17 Núm. 2 (2011): Verano 2011; 85-101 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/1150/1331 Derechos de autor 2016 Madera y Bosques |
| spellingShingle | Shirazinia, Mahyar Moya, Róger Muñoz, Freddy Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica |
| title | Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica |
| title_full | Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica |
| title_fullStr | Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica |
| title_full_unstemmed | Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica |
| title_short | Properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in Costa Rica |
| title_sort | properties of laminated curves manufactured with steamed veneers from fast-growth tropical wood in costa rica |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/1150 |
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