The fracture toughness and properties of thermally modified beech and ash at different moisture contents

Influence of the moisture content on the fracture characteristics of welded wood joint. Part 1: Mode I fracture

“…Based on this, a maximum of G Ic should be at ∼11% MC. According to the results of Majano-Majano et al (2012), the fracture characteristics of a welded wood joint are quite close to those of thermally treated beech. In comparison with the untreated beech, welded joint, independently from the MC, requires about three to four times less energy for the crack to propagate, that is, the joint is the weakest part in a welded wood assembly.…”

“…During crack propagation, the softening behavior is reported and fiber bridging occurs behind the crack tip. Like the other mechanical properties of wood, the fracture characteristics are also influenced by moisture, that is, they tend to decrease with increasing moisture content (MC) (Pluvinage 1992;Vasic and Stanzl-Tschegg 2007;Majano-Majano et al 2012). The maximal value of the stress intensity factor (i.e., fracture toughness K Ic ) is reached at 16% MC (Liyu et al 2003) or between 7% and 13% MC (Kretschmann and Green 1996).…”

Strength and stiffness of thermally rectified eucalyptus wood under compression

“…Thus, thermal treatment in wood has mainly been done in softwoods, and for nonstructural purposes. However, there has been a recent interest in the use of modified wood for structural applications 17 . On this study the effects of the compression strength characteristic value for the eucalyptus wood was investigated.…”

Fracture properties of green wood formed within the forks of hazel (Corylus avellana L.)

“…For instance, wood is usually far more ductile across the grain (LR and LT fracture systems), but brittle along the grain (RL, RT, TL, and TR fracture systems). Results of the previous research has also showed that wood is generally tougher radially than tangentially (Atack et al 1961;Ashby et al 1985;Stanzl-Tschegg et al 1995;Reiterer et al 2002a, b;Smith and Vasic 2003;Marki et al 2005;Vasic and Stanzl-Tschegg 2007;Yoshihara and Nobusue 2007;Majano-Majano et al 2012;Ozden and Ennos 2014;Özden et al 2016). …”