Reichert, Thomas and Ridley-Ellis, Daniel (2008) 3D lattice model for post-yield and fracture behaviour of timber. Proceedings of the 10th World Conference on Timber Engineering, Miyazaki 2008.
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The paper describes the development of a bespoke Finite Element program to model timber with a three dimensional lattice of single spring elements. These springs mimic meso-scale timber behaviour, namely the crushing and separation of fibre bunches by following a tri-linear loaddisplacement curve. Strength and stiffness parameters for longitudinal, lateral and diagonal elements are randomised for heterogeneity. To save computing time, two specialised algorithms have been implemented to perform a nonlinear analysis faster than an iterative Newton-Raphson algorithm. The algorithms have been adopted and extended to suit a 3D lattice model for timber. Furthermore lattice elements have only been used in areas where plasticity and fracture is expected, with transverse isotropic continuum elements elsewhere. The general calibration procedure of this hybrid model to tested timber specimens of Sitka spruce (Picea sitchensis) is described.
|Uncontrolled Keywords:||Wood; Timber; Fracture modelling; Computer algorithms; Calibration techniques; Sitka Spruce;|
|University Divisions/Research Centres:||Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment|
|Dewey Decimal Subjects:||600 Technology > 690 Building & construction > 694 Wood construction & carpentry|
600 Technology > 620 Engineering > 624 Civil engineering
000 Computer science, information & general works > 000 Computer science, knowledge & systems > 005 Computer programming, programs & data
|Library of Congress Subjects:||Q Science > QA Mathematics > QA75 Electronic computers. Computer science|
T Technology > TA Engineering (General). Civil engineering (General)
|Depositing User:||Dr. Daniel Ridley-Ellis|
|Date Deposited:||06 Apr 2009 12:52|
|Last Modified:||11 Feb 2013 11:59|
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