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European Journal of Wood and Wood Products

Erschienen in:

01.01.2014 | Originals Originalarbeiten

Full-field moisture induced deformation in Norway spruce: intra-ring variation of transverse swelling

verfasst von: Christian Lanvermann, Falk K. Wittel, Peter Niemz

Erschienen in: European Journal of Wood and Wood Products | Ausgabe 1/2014

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Abstract

The transverse hygro-expansion of Norway spruce wood is studied on the growth ring level using digital image correlation. This non-destructive technique offers the possibility for a contactless study of deformation fields of relatively large areas. The measured full-field strains are segmented into individual growth rings. Whereas radial strains closely follow the density progression with the maximum in the dense latewood (LW), tangential and shear strain remain constant except for positions around the edges of the sample. A simple FE three phase growth ring model is in good agreement with the experimental values. The selective activation of individual phases like earlywood (EW), transition wood and LW demonstrates that the radial hygro-expansion is dominated by the EW deformation, whereas tangential deformation is a complex interplay of expansion and compression that needs all tissues to fully develop.

Vorheriger Artikel Mechanical and physical properties of thermally modified Scots pine wood in high pressure reactor under saturated steam at 120, 150 and 180 °C

Nächster Artikel Comparison between heat treated sapwood and heartwood from Pinus pinaster

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Titel: Full-field moisture induced deformation in Norway spruce: intra-ring variation of transverse swelling
verfasst von: Christian Lanvermann
Falk K. Wittel
Peter Niemz
Publikationsdatum: 01.01.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Wood and Wood Products / Ausgabe 1/2014
Print ISSN: 0018-3768
Elektronische ISSN: 1436-736X
DOI: https://doi.org/10.1007/s00107-013-0746-8

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