Constitutive model for timber fracture under tension and shear
Result description
In this contribution we present a two-dimensional constitutive model for timber fracturing under tensile and shear loads. The model captures the following phenomena: (1) elastic and inelastic behavior in small deformation range, (2) material orthotropy,both in linear and non-linear range, (3) cracking across and along fibers, (4) behavior under unloading/reloading. The model can be applied both to hardwood and softwood by selecting appropriate material characteristics. We idealize timber as a homogeneous quasi-brittle material. Prior to cracking, the material is characterized by elastic orthotropic stress-strain relationship. An orthotropic fracture criterion, which can distinguish between crack forming across or along fibers is proposed. Post-cracking response is treated by means of the fixed smeared crack model.
Keywords
timber2D constitutive modelorthotropic elasticityorthotropic fracture criterionfixed smeared crack modeltraction-separation law
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Constitutive model for timber fracture under tension and shear
Original language description
In this contribution we present a two-dimensional constitutive model for timber fracturing under tensile and shear loads. The model captures the following phenomena: (1) elastic and inelastic behavior in small deformation range, (2) material orthotropy,both in linear and non-linear range, (3) cracking across and along fibers, (4) behavior under unloading/reloading. The model can be applied both to hardwood and softwood by selecting appropriate material characteristics. We idealize timber as a homogeneous quasi-brittle material. Prior to cracking, the material is characterized by elastic orthotropic stress-strain relationship. An orthotropic fracture criterion, which can distinguish between crack forming across or along fibers is proposed. Post-cracking response is treated by means of the fixed smeared crack model.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Basic information
Result type
O - Miscellaneous
CEP
JL - Fatigue and fracture mechanics
Year of implementation
2013