Using auxiliary adherends to eliminate need for grain control in fracture testing of adhesively bonded wood

Proper crack growth in the investigation of adhesive failure bonded wood joints requires laborious grain control. By adding auxiliary adherends, this paper introduces and evaluates a novel sample geometry that enables fracture energy characterization veneer-adhesive systems. The proposed method was applied to three species test commonly used adhesives. successfully identified differences energies associated with use different adhesives on same offered comparable success rate as control method. More importantly, for sawn planed veneers were without lathe checks common rotary-peeled veneers, even higher than rotary peeled indicating significance our adhesion. We further explored effects propagation both parallel perpendicular orientation designed wax strip specimens understand rising R-curve behavior observed certain species.