Delamination of cellulose-based materials during loading–unloading conditions : Interface model and experimental observations

• A cohesive interface model based on a master curve is proposed for the analysis of delamination in paperboard under various loading, unloading, and reloading conditions. The model is thermodynamically consistent and considers the effects of elasticity, plasticity, and damage. The proposed model is verified by comparing its predictions with experimental data obtained from multiple loading–unloading–reloading cycle experiments using a split double cantilever beam specimen. The results show that the model can predict the cyclic behavior of shear loading and provide insight into the damage evolution associated with different loading paths by analyzing the shear stress distribution in the fracture process zone. The model’s calibration process requires monotonic normal and shear loading data but only cyclic normal loading data. Additionally, the model accounts for the paperboard’s fiber–fiber friction and normal dilatation due to shear loading. In total, nine parameters are needed to calibrate the mode.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)

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

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

Nyckelord

Cantilever beams

Cellulose

Interfaces (materials)

Paperboards

Shear stress

Stress analysis

Unloading

Cellulose based materials

Cohesive interface models

Condition

Cyclic loading

Interface modeling

Loading data

Normal loading

Reloadings

Shear loadings

Traction-separation law

Loading

Materials Science

Materialvetenskap

Materialteknik

Materials Engineering

Maskinteknik

Mechanical Engineering

Cellulose-based materials

Cyclic loading

Experiments

Interface model

Traction–separation law

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)