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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

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

  • Czech description

Classification

  • Type

    O - Miscellaneous

  • CEP classification

    JL - Fatigue and fracture mechanics

  • OECD FORD branch

Result continuities

  • Project

  • 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

O

CEP

JL - Fatigue and fracture mechanics

Year of implementation

2013