An Investigation of Flexural Behavior of Pure and Hybrid Wood Composite Panels Using Weibull Analyses

The production of inexpensive wood products compared to their strength is important both in terms of economy and meeting the expectations of users. For this purpose, the use of hybrid wood products is increasing in the furniture industry. With the hybridization process, relatively cheap and flimsy material is combined with a material that has a stronger structure. Thus, stronger bonded material is manufactured cheaper. In this study, the flexural behavior of pure and hybrid wood composite panels, which were prepared by applying longitudinal jointing techniques from different wood materials, was investigated. In this context, pure chipboard, pure medium density fiberboard (MDF), chipboard-east beech and MDF-east beech hybrid wood composite panels were produced. During the hybridization process, oriental beech was combined by using the self-grooving technique in three different numbers as one row, two rows, and three rows. Flexural test results were analyzed according to the Weibull distribution method. The results of the analyses showed that the hybridization process increased the flexural strength and flexural modulus of pure wood panels by up to 214 %, and 95 %, respectively. Proizvodnja jeftinijih proizvoda od drva uz očuvanje njihove čvrstoće ima veliku važnost u ekonomskom smislu i u smislu ispunjavanja korisničkih očekivanja. Rezultat tog nastojanja jest sve veća uporaba hibridnih proizvoda od drva u industriji namještaja. Postupkom hibridizacije relativno jeftin i krhak materijal kombinira se s materijalom jače strukture te se na taj način postiže čvršći a jeftiniji materijal. U ovom je radu istraženo ponašanje čistih i hibridnih kompozitnih drvnih ploča pri savijanju, proizvedenih uzdužnim lijepljenjem različitoga drvnog materijala. Za potrebe istraživanja izrađene su čista ploča vlaknatica srednje gustoće (MDF) i hibridne kompozitne ploče od iverice i bukovine te od MDF ploče i bukovine. Tijekom postupka hibridizacije bukovi su elementi povezivani uz pomoć utora, a izrađeni su uzorci imali jedan, dva ili tri bukova elementa. Rezultati ispitivanja svojstava ploča pri savijanju analizirani su uz pomoć Weibullove distribucije. Pokazalo se da je postupak hibridizacije pridonio povećanju čvrstoće ploča na savijanje za 214 %, a modula elastičnosti za 95 %.