Results 191 to 200 of about 72,611 (243)

Wood welding: A challenging alternative to conventional wood gluing

Scandinavian Journal of Forest Research, 2005
The recent finding of a new way to assemble two pieces of wood by mechanically induced wood welding opens a new and challenging perspective for producing more environmentally friendly wooden products, i.e. without glue. This process, recently applied to solid wood, needs to be better understood in order to investigate the dependence of the variability ...
Leban, Jean-Michel, Pizzi, Antonio, Properzi, Milena, Pichelin, Frédéric, Gelhaye, Pierre, Rose, Christophe   +5 more
openaire   +3 more sources

Wood joints and laminated wood beams assembled by mechanically-welded wood dowels

Journal of Adhesion Science and Technology, 2007
Dowel welding by high-speed rotation was used to join two wood blocks and strong joints were obtained. Dowel angle to the surface of the wood blocks to be joined had a marked influence on the mechanical performance of the joint. When the dowel was inserted at 90° to the substrate, the dowel was subjected to and resisted a shear force only.
Bocquet, Jean-François, Pizzi, Antonio, Despres, Aurélien, Mansouri, Hamid Reza, Resch, Ludovic, Michel, D., Letort, L.   +6 more
openaire   +2 more sources

Parameter interactions in two-block welding and the wood nail concept in wood dowel welding

Journal of Adhesion Science and Technology, 2005
The interactions between parameters found to be determinant in wood dowel welding by high speed rotation have been evaluated. Of these, the interactions that proved to be the most significant, in descending order, were rotation rate/dowel moisture content, followed by rotation rate/ethylene glycol, and finally, at a lower level of significance, the ...
Ganne-Chédeville, Christelle, Pizzi, Antonio, Thomas, André, Leban, Jean-Michel, Bocquet, Jean-François, Despres, Aurélien, Mansouri, Hamid   +6 more
openaire   +3 more sources

Vibration welding of heat-treated wood

Journal of Adhesion Science and Technology, 2006
Vibration welding of wood that has been preheated according to an industrial two-step process indicates that such wood can be welded and can yield welded joints of good strength. The joint strength is, however, markedly lower than obtained when welding non-heat-treated timber.
Boonstra, M., Pizzi, Antonio, Ganne-Chedeville, C., Properzi, Milena, Leban, Jean-Michel, Pichelin, Frédéric   +5 more
openaire   +2 more sources

Linear welding of grooved wood surfaces

European Journal of Wood and Wood Products, 2009
Linear wood welding of grooved surfaces to ease the elimination of water vapour and to increase the welding surface was performed in this study.
P. Omrani, H. R. Mansouri, A. Pizzi
openaire   +1 more source

Welding-through doweling of wood panels

Holz als Roh- und Werkstoff, 2006
Panel products have been joined to levels satisfying the requirements of the relevant standards for metallic connector assemblies by rotation welding of beech dowels through them. The wood panels substrates such as particleboard, OSB and MDF welded to the dowels almost as well as solid timber.
Resch, L., Despres, Aurélien, Pizzi, Antonio, Bocquet, Jean-François, Leban, Jean-Michel   +4 more
openaire   +2 more sources

Influence of Wood Welding Frequency on Wood Constituents Chemical Modifications

Journal of Adhesion Science and Technology, 2009
Interesting chemical differences betwen weldlines obtained at 100 Hz and 150 Hz frequencies in linear vibration wood welding were observed by FT-IR and 13C NMR. An increase in the proportion of unoxidized phenolic groups in the lignin is observed by FT-IR and the increased joint strength observed is ascribed to the improved adhesion derived from this ...
L. Delmotte, H. R. Mansouri, P. Omrani, A. Pizzi   +3 more
openaire   +1 more source

Emission Gases in Linear Vibration Welding of Wood

Journal of Adhesion Science and Technology, 2009
Analysis of the gases, vapour and degradation volatiles emitted as smoke from the welding interface during linear vibration welding of beech and oak woods has shown that the compounds in such a smoke are water vapour, CO2, and degradation compounds from wood polymeric carbohydrates as well as from amorphous lignin. For the two hardwoods tested the main
Omrani, P., Masson, E., Pizzi, Antonio, Mansouri, H.R.   +3 more
openaire   +3 more sources

Wood-dowel rotation welding – a heat-transfer model

Journal of Adhesion Science and Technology, 2007
The relationship between temperature, time of friction and thermal flux for high-speed rotational wood-dowel welding has been modelled through a heat-transfer model. It was shown that the interface temperature could be estimated as a function of the friction time by the general equation T0 = Ti + 2βuτ√α/h√π √t, where T0 - temperature at the welding ...
Zoulalian, André, Pizzi, Antonio
openaire   +2 more sources

Wood–bamboo–wood laminated composite lumber jointed by linear vibration–friction welding

European Journal of Wood and Wood Products, 2013
The linear vibration-friction welding offers several advantages compared to traditional mechanical fasteners or gluing. This study examines the possibility of applying mechanically-induced vibration welding to the joining procedure of a wood-bamboo sandwich-laminated composite. The result shows that average tensile strength values of the composites can
Hu, J. B., Pizzi, A.
openaire   +1 more source