Evaluation of the mechanical behaviour of poplar specimens with and without fingers subjected to tensile stress by means of acoustic emission and dic


Engineered wood product (EWP) offers an improvement in performance and mechanical properties over the use of sawn timber. This is mainly due to the fact that these products can eliminate defects such as knots, splits, etc. The removal of these defects has been achieved through the development of the finger-joint technique. This technique makes it possible to merge boards together to produce the desired length or width, making it possible to manufacture, among other products, laminated beams of larger dimensions. Therefore, the evaluation of these joints in a laminated element is vital to ensure a quality final product, as they become the areas with the highest stress concentration. To this end, this work aims to carry out an evaluation of the mechanical behaviour of elements with and without finger-joints made of poplar monitored with acoustic emission and DIC, as well as to obtain parameters to predict the failure in the specimens with finger-joints.
