Prediction of bendig load capacity of timber beams by finite element method simulation of knots and grain deviation

Baño Gómez, Vanessa; Arriaga Martitegui, Francisco; Soilán Cañas, Azahara y Guaita Fernández, Manuel (2011). Prediction of bendig load capacity of timber beams by finite element method simulation of knots and grain deviation. "Biosystems Engineering", v. 109 (n. 4); pp. 241-249. ISSN 1537-5110. https://doi.org/10.1016/j.biosystemseng.2011.05.008,.

Descripción

Título: Prediction of bendig load capacity of timber beams by finite element method simulation of knots and grain deviation
Autor/es:
  • Baño Gómez, Vanessa
  • Arriaga Martitegui, Francisco
  • Soilán Cañas, Azahara
  • Guaita Fernández, Manuel
Tipo de Documento: Artículo
Título de Revista/Publicación: Biosystems Engineering
Fecha: Agosto 2011
Volumen: 109
Materias:
Escuela: E.T.S.I. Montes (UPM) [antigua denominación]
Departamento: Construcción y Vías Rurales [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A finite element model was used to simulate timberbeams with defects and predict their maximum load in bending. Taking into account the elastoplastic constitutive law of timber, the prediction of fracture load gives information about the mechanisms of timber failure, particularly with regard to the influence of knots, and their local graindeviation, on the fracture. A finite element model was constructed using the ANSYS element Plane42 in a plane stress 2D-analysis, which equates thickness to the width of the section to create a mesh which is as uniform as possible. Three sub-models reproduced the bending test according to UNE EN 408: i) timber with holes caused by knots; ii) timber with adherent knots which have structural continuity with the rest of the beam material; iii) timber with knots but with only partial contact between knot and beam which was artificially simulated by means of contact springs between the two materials. The model was validated using ten 45 × 145 × 3000 mm beams of Pinus sylvestris L. which presented knots and graindeviation. The fracture stress data obtained was compared with the results of numerical simulations, resulting in an adjustment error less of than 9.7%

Más información

ID de Registro: 11389
Identificador DC: http://oa.upm.es/11389/
Identificador OAI: oai:oa.upm.es:11389
Identificador DOI: 10.1016/j.biosystemseng.2011.05.008,
Depositado por: Memoria Investigacion
Depositado el: 26 Jul 2012 10:18
Ultima Modificación: 20 Abr 2016 19:28
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