ANGLE-DEPENDENT DELAMINATION OF PAPER .2. DETERMINATION OF DEFORMATION AND DETACHMENT WORK IN PAPER PEELING

Laminated handsheets of paper were peeled apart at various angles. The work of peeling increased with the peel angle. An analysis has shown that the work of peeling consists of two main contributions: work of d etachment and work of inelastic deformation. The work of deformation e xpended in the bending and unbending modes was quantified using a theo retical model based on compressional and tensional stress-strain chara cteristics. Application of this model leads to the conclusion that the work of detachment is independent of angle.