The two Non-Destructive Evaluation [ NDE ] techniques viz., Air Coupled Ultrasonic [ACU ] and Pulsed Thermography [PT ] find many applications in aerospace industry . These NDE techniques can be used for debond detection in spacecraft structural components like honeycomb sandwich deck plates, shear web panels and central cylinder made of aluminum core and composite face sheets. The Air coupled ...

A transparent fire protective sol-gel coating deposited on wood has been evaluated using different tests, such as mass loss cone, mini single burning item and furnace tests. The heat release rate total during combustion, but also the flame spread behavior thermal protection performances of coatings have studied. Two processes to apply assessed show thickness dependence performance. When a thick...

The hot-press is undoubtedly a key piece of equipment in composite panel production. Process control of the pressing procedure can he divided into preprocess, in-process, and postprocess measurement and control stages. This paper presents an in-process measurement and control technique during the pressing cycle and discusses application possibilities based on the study. There are different curi...

Drywood termites are able to assess wood size using vibratory signals, although the exact mechanism behind this assessment ability is not known. Important vibratory characteristics such as the modal frequencies of a wooden block depend on its geometry and boundary conditions; however, they are also dependent on the material characteristics of the block, such as mass, density and internal dampin...

The test panels obtained from Scots pine (Pinus sylvestris L.) and Eastern beech (Fagus orientalis L.) were initially adjusted to have 8%, 10%, and 12% moisture content in this study. One-component semimatte and two-component water borne varnishes were applied on the surfaces in order to investigate the effect of the type and the moisture content of the wood on the hardness and the gloss values...

In this study autonomic self-healing of impact damage in composite materials is shown using a microencapsulated healing agent. The components for self-healing, urea–formaldehyde microcapsules containing dicyclopentadiene (DCPD) liquid healing agent and paraffin wax microspheres containing 10 wt% Grubbs’ catalyst, have been successfully incorporated in a woven S2-glass-reinforced epoxy composite...

A series of analytical and experimental investigations is presented to study the response and failure of pyramidal truss core sandwich panels made of carbon fiber composite under axial compression. In the analytical part of the study, three failure modes: (i) Euler or core shear macro-buckling, (ii) face wrinkling, and (iii) face sheet crushing, were considered and theoretical relationships for...

The aim of the study is to describe main trends and possibilities in Russian forestry. Based on statistical data, authors analyze general forest industry like woodworking, roundwood wood pellets production. Russia's output roundwood, sawnwood, pellets, wood-based panels veneer sheets has been growing steadily over past 5 years. production only two panel types – hardboard other fiberboard either...

The increasing demand on the wood market makes it necessary to use all secondary resources, including branches and spindles. properties of deciduous softwood spindles were evaluated in order create panels, highlighting transverse texture with high value added. research analyzed from (beech, maple) conifer (spruce, fir) methodology obtaining panels transversal structure was also presented. produ...