PSI - Issue 72

Sviatoslav Homon et al. / Procedia Structural Integrity 72 (2025) 301–307

304

Furthermore, we propose formulas for estimating the relative ultimate deformations of glued hardwood and coniferous wood as follows (3-8): – birch wood u c,u =1,48u c,0,d ; (3) – alder wood u c,u =1,41u c,0,d ; (4) – ash wood u c,u =1,65u c,0,d ; (5)

– larch wood u c,u =1,37u c,0,d ; – pine wood u c,u =1,38u c,0,d ; – spruce wood u c,u =1,40u c,0,d .

(6)

(7)

(8)

4. Results and discussion Based on experimental studies of coniferous and hard (deciduous) laminated wood samples, comprehensive diagrams of ‘stress σ с - strain u c ’ were developed (Fig. 2, Fig. 3), an d the key strength and deformation parameters were identified across all relevant areas (Yasniy et al. (2022); Homon et al. (2023)).

Fig. 2. Complete ‘stress σ с - strain u c ’ diagrams for glued hardwood