Sökning: "Spiral grain angle"
Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Spiral grain angle.
1. Spiral Grain in Norway Spruce
Sammanfattning : Wood is a major construction material that is used in many contexts, and for different purposes. Serious problems may arise, however, when moisture related deformations as twist occur in wood used in different types of building structures, joinery and furniture. LÄS MER
2. Non-destructive measurement of spiral grain with computed tomography
Sammanfattning : Spiral grain is a wood feature that is formed in the living tree. Timbers sawn from trees with severe spiral grain have a great tendency to twist when the moisture content changes. This is a big problem in the wood products manufacturing process. LÄS MER
3. Electromagnetic Modelling for the Estimation of Wood Parameters
Sammanfattning : Spiral grain in trees causes trouble to the wood industry, since boards sawn from trees with large grain angle have severe problems with form stability. Measurements of the grain angle under bark enable the optimisation of the refining process. LÄS MER
4. Moisture-induced Distortion in Norway Spruce Timber - Experiments and Models
Sammanfattning : Timber is a natural material that is environmentally friendly, renewable, light, strong and, in the eyes of most people, beautiful. Timber does, however, have one important drawback when it is used in a modern mechanised building process - its lack of straightness. LÄS MER
5. Moisture-induced distortion in timber structures - examples based on partition walls
Sammanfattning : The shape of timber changes due to variations in moisture content (MC). In Scandinavia, producers normally dry timber to an MC of 18%. However, after the studs are built into the wall structure, for example, they may become distorted as a result of further drying in the structure. The final MC in a heated building in Scandinavia is about 8%. LÄS MER