Material model for wood

Heron

J.W.G. van de Kuilen²  3 Holzforschung München, University of Technology Munich, Germany¹  C. Sandhaas³  2 Delft University of Technology, the Netherlands¹ 

[1] 2 Delft University of Technology, the Netherlands;1 Institute for Timber Structures and Building Construction, Karlsruhe Institute of Technology, Germany

关键词: Constitutive model;    timber;    wood;    continuum damage mechanics;    finite element method;   

DOI  :  

学科分类：建筑学

来源: Technische Universiteit Delft * Faculty of Civil Engineering

【 摘 要 】

Wood is highly anisotropic and shows ductile behaviour in compression and brittle behaviour in tension and shear where both failure modes can occur simultaneously. A 3D material model for wood based on the concepts of continuum damage mechanics was developed. A material subroutine containing the developed model was implemented into a standard FE framework. Eight stress-based failure criteria were derived in order to formulate piecewise defined failure surfaces. The damage development of wood was controlled by nine damage variables. Embedment tests using three different wood species (spruce, beech, azob?) were carried out whose results were compared to modelling outcomes. The failure modes could be identified and the general shape of the load-displacement curves agreed with the experimental outcomes up to a numerical limit.

【 授权许可】

Unknown