Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Prediction of bendig load capacity of timber beams by finite element method simulation of knots and grain deviation
Year:2011
Research Areas
  • Engineering
Information
Abstract
A finite element model was used to simulate timber beams 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 grain deviation, on the fracture.Afinite element modelwasconstructed using theANSYSelement 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 _ 3000mm beams of Pinus sylvestris L. which presented knots and grain deviation. The fracture stress data obtained was compared with the results of numerical simulations, resulting in an adjustment error less of than 9.7%.
International
Si
JCR
Si
Title
Biosystems Engineering
ISBN
1537-5110
Impact factor JCR
1,354
Impact info
Volume
109
10.1016/j.biosystemseng.2011.05.008
Journal number
From page
241
To page
249
Month
SIN MES
Ranking
Agricultural Engineering: 5 de 12
Participants
  • Autor: Vanessa Baño (CETEMAS)
  • Autor: Francisco Arriaga Martitegui (UPM)
  • Autor: Azahara Soilán (CIS MADEIRA)
  • Autor: Manuel Guaita Fernández (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Construcción con Madera
  • Departamento: Construcción y Vías Rurales
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)