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Items for "anisotropy"

Viscoelastic properties of green wood across the grain measured by harmonic tests in the range 0–95°C: Hardwood vs. softwood and normal wood vs. reaction wood

The viscoelastic properties of wood have been investigated with a dynamic mechanical analyser specifically developed for wooden materials, the WAVE^T device...

Keywords: anisotropy, Cole-Cole diagrams, dynamic mechanical analysis (DMA), environmental vibration analyser for wood (WAVET), reaction wood, time-temperature equivalence, viscoelasticity

08/2007 | Holzforschung, Walter de Gruyter

Modelling anisotropic maturation strains in wood in relation to fibre boundary conditions, microstructure and maturation kinetics

A generalisation of existing mechanical models is proposed to account for the relation between wood macroscopic properties and fibre microstructure and chemical composition...

Keywords: anisotropy, boundary conditions, cell-wall maturation, growth strain, multilayer model, residual stress, wood fibre

05/2005 | Holzforschung, Walter de Gruyter

A simple anisotropy correction procedure for acoustic wood tomography

Anisotropy of acoustic propagation velocities is a ubiquitous feature of wood. This needs to be considered for successful application of travel time tomography, an increasingly popular technique for non-destructive testing of living trees...

Keywords: Acoustic, anisotropy, decay, inversion procedure, tomography, trees, ultrasound

08/2006 | Holzforschung, Walter de Gruyter

Anisotropy of Field Strength Meters

Results of field strength measurements at radio frequencies are usually affected by a metrological relevant uncertainty...

Keywords: field strength meters, field strength sensors, field strength monitors, measurement uncertainty budget, anisotropy