A Micromechanical Model of the Deterioration of a Wood Fibre

• A simple analytical model is presented in this paper for the prediction of the stiffness degradation and the damage state in a wood fibre, loaded in uniaxial tension or shear. The model is based on an assumed displacement field together with the minimum total potential energy theorem. For the damage development, an energy criterion is employed. The model is applied to a specific example and the relevant stiffness coefficients are calculated as a function of the damage state. The damage development as a function of the applied loads is also given. The results from a specific example considered indicate that a tensile load affects the stiffness degradation to a larger extent than does a shear load.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering (hsv//eng)

Nyckelord

Energy consumption

Fibre structure

Fracture

Mathematical analysis

Moisture content

Picea abies

Refining

Stiffness degradation

Strains

Temperature

Thermomechanical pulping

Engineering mechanics

Teknisk mekanik

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)