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

Baño Gómez, Vanessa and Arriaga Martitegui, Francisco and Soilán Cañas, Azahara and 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,.

Description

Title: Prediction of bendig load capacity of timber beams by finite element method simulation of knots and grain deviation
Author/s:
  • Baño Gómez, Vanessa
  • Arriaga Martitegui, Francisco
  • Soilán Cañas, Azahara
  • Guaita Fernández, Manuel
Item Type: Article
Título de Revista/Publicación: Biosystems Engineering
Date: August 2011
ISSN: 1537-5110
Volume: 109
Subjects:
Faculty: E.T.S.I. Montes (UPM)
Department: Construcción y Vías Rurales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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%

More information

Item ID: 11389
DC Identifier: http://oa.upm.es/11389/
OAI Identifier: oai:oa.upm.es:11389
DOI: 10.1016/j.biosystemseng.2011.05.008,
Deposited by: Memoria Investigacion
Deposited on: 26 Jul 2012 10:18
Last Modified: 20 Apr 2016 19:28
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