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2 edition of Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions found in the catalog.

Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions

Antti Hanhjijarvi

Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions

experiments and modelling in temperature range 95-125 [degree] C

by Antti Hanhjijarvi

  • 376 Want to read
  • 36 Currently reading

Published by VTT, Technical Research Centre of Finland in Espoo, Finland .
Written in English

    Subjects:
  • Materials -- Creep.,
  • Drying.

  • Edition Notes

    StatementAntti Hanhjijarvi.
    SeriesVTT publications -- 301., VTT julkaisuja -- 301.
    ContributionsValtion teknillinen tutkimuskeskus.
    The Physical Object
    Pagination94 p. + appendices :
    Number of Pages94
    ID Numbers
    Open LibraryOL15487820M
    ISBN 109513850412

    If the kiln drying og the case-hardened timber is continued to dryness then the natural shrinkage movement of the moist interior as it dries will be locked in by the rigid outer skin, resulting in severe internal stresses and subsequent checking or disruption of the wood fibers, not visible from the outside. Finland is largely a flat country. However, in the north, there are hills, and in the extreme north-west, on the border with Norway, even a mountain, Halti, 1, meters (4, feet) high. Winter is long and cold throughout the country; it lasts almost five months even in Helsinki, which lies in the far south. Here, the temperature remains.

    Context sentences for "grain" in Finnish. These sentences come from external sources and may not be accurate. is not responsible for their content. Read more here. English Worst of all is the loss of animal fodder, mainly as the result of the grain lost. more_vert. Study Flashcards On Civil Midterm #2 at Quickly memorize the terms, phrases and much more. makes it easy to get the grade you want!

      The change in the mean temperature in Finland is investigated with a dynamic linear model in order to define the sign and the magnitude of the trend in the temperature time series within the last years. The data consists of gridded monthly mean temperatures. The grid has a 10 km spatial resolution, and it was created by interpolating a homogenized temperature series measured at Finnish. The annual average temperature is relatively high in the southwestern part of the country ( to °C or to °F), with quite mild winters and warm summers, and low in the northeastern part of Lapland (0 to −4 °C or 32 to 25 °F).


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Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions by Antti Hanhjijarvi Download PDF EPUB FB2

Hanhijärvi, Antti. Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions. Experiments and modelling in temperature range 95 – °C. EspooTechnical Research Centre of Finland, VTT Publications 94 p.

+ app. UDC Keywords softwoods, spruce wood, pine wood, creep. The set of papers sums up the results of an extensive project to quantify primarily the creep characteristics but also other deformation properties of Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) wood under conditions relevant in the high temperature drying process.

The programme included tension experiments on tan-gentially and radially oriented specimens both under Cited by: Deformation properties of Finnish spruce and pine wood in tangential and radial directions in association to high temperature drying: Part I. Experimental techniques for conditions simulating the.

Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions: Experiments and modelling in temperature range °C Article Jan   Edvardsen, K. and K.M. Sandland. Increased drying temperature ­ Its influence on the dimensional stability of wood.

Holz Roh- Werkst. 57, ­ Hanhijärvi, A. Perpendicular to grain creep of Finnish softwoods in high temperature drying conditions ­ Experiments and modelling in temperature range 95­ °C. Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions: Experiments and modelling in temperature range °C Article Jan   A.

HanhijärviPerpendicular-to-grain creep of finnish softwoods in high temperature drying conditions – experiments and modelling in temperature range 95– °C. Perpendicular-to-grain creep of Finnish softwoods in high temperature drying conditions: experiments and modelling in temperature range °C; Physical and chemical properties of peat in Rwanda, central Africa; Physical characterisation of source specific nanoparticles; Physical characterization of diesel exhaust nucleation mode particles.

Picea abies) and Scots pine (Pinus sylvestris) wood under conditions relevant in the high temperature drying programme included tension experiments on perpendicular specimens at temperatures 95 °C– °C.

Based on the experiments, a constitutive model to describe the behaviour was developed for use in numerical simulation of drying stresses and is reported in this paper. ) and Scots pine (Pinus sylvestris) wood under conditions relevant in the high temperature drying process.

This paper reports on the experimental results obtained concerning creep in tension under constant conditions, primarily in wet (saturated, green) state at temperatures 95 °C– °C.

The results are compared to some other researchers' measurements in a trial of the applicability of. The specimens were cut in three planes perpendicular to the length (longitudinal, parallel to grain), thickness (horizontal, perpendicular to grain) and height (vertical, perpendicular to grain) of glulam timber (same quantity for each direction) shown in Figs.

1b and 2 with a nominal dimension of 6 × 60 × m m; two perpendicular dimension. Initially, vacuum drying at °C and vacuum pressure of 25 ± kPa, (corresponding to water boiling temperature of 65 °C) were applied to the boards to dry them to 0% MC.

The drying process was carried out in the same cylinder where the thermo-vacuum treatment would take place later. In Finland, wood harvesting, sawmills and delivery are run with first-class technology and competence. This secures deliveries regardless of the weather conditions and the time of the year.

Wood from Finland is a national promotion program for Finnish sawn timber operated by Business Finland and Finnish Sawmill Association. Deformation properties of Finnish spruce and pine wood in tangential and radial directions in association to high temperature drying.

Part III. Experimental results under drying conditions (mechano-sorptive creep) A. Hanhijärvi Pages   The European approach limits high-temperature creep testing of adhesives to 80 °C. The North American approach is a little difficult to follow in that unprotected I-beams have a very poor fire-rating unless protected due to their very thin webs, so that the method by which the flange and web are bonded is unlikely to make a great deal of.

control of gluing conditions to obtain best results Lumber and veneer have good finishing qualities and have a warm, appealing appearance. Pecan and hickory may be considered moderately difficult to dry and require days in the kiln to dry 1-inch lumber from green to 6 percent moisture content.

Stresses perpendicular to grain after a wetting process. Timber bridge under natural environmental During the high temperature heat treatment of wood, it is important to know how the Thermo-Hygro-Mechanical modelling at high temperatures.

Starting point: Drying modelling by Hanhijärvi and Mackenzie-Helnwein () max T= °C. The other main uses of Finnish softwood in China are interior cladding, lumber for pressure treatment and window frames. Pine lumber, in addition to spruce, is also sold for the two latter uses.

Spruce lumber export volumes from Finland to China doubled during the first half of. Finnish birch (Betula pendula, hardwood) and spruce (Picea abies, softwood) are the most important raw materials in the plywood process.

Trees grow slowly in Finland’s climate and thus the wood it produces is close-grained and of consistent high quality. Birch is of uniform consistency and it has excellent strength, peeling and gluing prop.

GRAIN is a small international non-profit organisation that works to support small farmers and social movements in their struggles for community-controlled and biodiversity-based food systems. Climate: In northern Finland winters are long and very cold, while summers are surprisingly warm, but brief.

In the southern areas of Finland winter temperatures are milder, but still cold, while summer days (May through September) can be downright the Arctic Circle (in the far north) the summer sun never completely sets, thus the phrase, "Polar Night.".The summer offers great weather in Finland.

In the Finnish South and central Finland, summer weather is mild and warm, just like in other parts of southern Scandinavia, whereas Finland's winters are long and cold. In northern parts of Finland, you can find snow on the ground for upwards of 90 days each year.A valuable merit of high frequency drying of grain is the absence of a drying medium with a high temperature and the good uniformity of drying throughout the entire grain mass (Knipper, ).

Food drying. RF drying, with regards to food, has mainly been used for post-bake drying of cookies, crackers and pasta (UIE, ; Mermelstein,