In this paper, acoustic emission (AE) signals obtained during quasi-static crack propagation in adhesively bonded beech wood were classified using an unsupervised pattern recognition method. Two ductile one-component polyurethane (1C-PUR) adhesives with the same formulation except for one system...

This proceedings contains 6 papers entitled: (1) Characteristics and use of large diameter fir [Abies] and spruce [Picea] wood; (2) Timber from large diameter roundwood - problem or chance?; (3) Innovative solutions for cutting large timber; (4) Availability of large diameter roundwood for a...

A brief history is presented of the development of heat-treated wood in Switzerland. Properties are described, including colour, changes in mass and density, swelling and shrinkage, moisture content, elastomechanical properties, Brinell hardness, pH, and resistence against wood destroying fungi.

It is generally assumed that the properties of wood against fatigue are good, but little is known about the properties of adhesively bonded wood, which represents today most of the wood-based products. Lap-shear samples glued with three common wood adhesives [two ductile one-component polyurethane...

Subject to this study is the modification of an experimental two-component polyurethane (2C PUR) as an alternative adhesive for structural hardwood bonding. The 2C PUR has been adapted by calcium carbonate as filler to increase its modulus of elasticity with the aim of increasing the modulus...

Although glueing softwood is well mastered by the industry, predicting and controlling bond quality for hardwood is still challenging after years of research. Parameters such as the adhesive type, resin-hardener ratio, and the penetration behaviour of the wood are determinants for the bond quality. ...

Modern timber constructions require high performance adhesives satisfying the various demands with respect to mechanical and physical loads. In order to develop such adhesives, a deep knowledge of the fracture behavior of the bonded wood joints and, more specifically, of the influence of the...

Wood with distinctively different properties in the longitudinal, radial and tangential directions exhibits a strong moisture-dependent material characteristic in the elastic range. The purpose of this study was to analyze the orthotropic elastic properties of Chinese fir wood [Cunninghamia...

Elastic and strength properties are very important material characteristics in mechanical modelling. Due to the anisotropic and hygroscopic nature of wood, a characterization of wood mechanical behavior will require knowledge of its moisture-dependent properties in relation to the three principal...

In this study, two types of hardwood Walnut (Juglans regia L.) and Cherry (Prunus avium L.) are tested using both ultrasonic and mechanical testing methods. These species frequently appear in cultural heritage objects in museums (e.g. musical instruments, furniture). In analyzing the ultrasound...