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Simulation of cracks in wood using a coupled material model for interface elements
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Jörg Schmidt
Published/Copyright:
June 12, 2007
Abstract
A three-dimensional anisotropic material model is presented that is applicable in combination with interface elements for simulation of the behavior of timber structures loaded in shear and tension perpendicular to the wood fibers. The material model can predict the stresses derived from the three-dimensional state of deformation. Determination of the algorithmic material tangent is shown. Computation of a stress component results from deformation in all directions. Furthermore, a damage model is implemented to simulate cyclic loading that yields a realistic unloading function for a cracked structure. In this case, a continuous-differentiable material formulation guarantees a robust path-following algorithm. A basic example is used to demonstrate the capability of the model to simulate the behavior of timber structures realistically and underlines the need for further research.
Received: 2006-7-18
Accepted: 2007-1-29
Published Online: 2007-06-12
Published in Print: 2007-6-1
©2007 by Walter de Gruyter Berlin New York
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Keywords for this article
cracks;
finite-element method;
interface elements;
material modeling;
wood
Articles in the same Issue
- Meetings
- Micromechanical modeling of solid-type and plate-type deformation patterns within softwood materials. A review and an improved approach
- Failure mechanisms in wood-based materials: A review of discrete, continuum, and hybrid finite-element representations
- Morphological lattice models for the simulation of softwood failure and fracture
- Experimental and numerical investigation of wood fracture mechanisms at different humidity levels
- Material point method simulations of transverse fracture in wood with realistic morphologies
- Simulation of cracks in wood using a coupled material model for interface elements
- Preliminary tests to evaluate the mechanical properties of young trees with small diameter
- Characterization and strength modeling of parallel-strand lumber
- Dynamic behaviour of cork and cork-filled aluminium tubes: Numerical simulation and innovative applications
- A numerical study of the transverse modulus of wood as a function of grain orientation and properties
- Effects of ring characteristics on the compressive strength and dynamic modulus of elasticity of seven softwood species
- Experimental device for the accurate determination of wood-water relations on micro-samples
- Evaluating the suitability of hybrid poplar clones for the manufacture of oriented strand boards
- Finely milled kenaf core as a natural plywood binder
- Alkaline peroxide treatment of ECF bleached softwood kraft pulps. Part 1. Characterizing the effect of alkaline peroxide treatment on carboxyl groups of fibers
- Alkaline peroxide treatment of ECF bleached softwood kraft pulps: Part 2. Effect of increased fiber charge on refining, wet-end application, and hornification
- Molar mass determination of lignins by size-exclusion chromatography: towards standardisation of the method
