Combination of X-ray and digital image correlation for the analysis of moisture-induced strain in wood: opportunities and challenges = Kombination von Röntgenmessung und digitaler Bildkorrelation zur Dehnungsanalyse an Holz: Potential und Schwierigkeiten
Keunecke, Daniel ; Novosseletz, Katia ; Lanvermann, Christian ; Mannes, David ; Niemz, Peter
In: European Journal of Wood and Wood Products, 2012, vol. 70, no. 4, p. 407-413
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- In this present study, the moisture-induced deformation behaviour of a spruce sample was analysed one- and two-dimensionally with high resolution on the radial-tangential surface. For this purpose, an artificial speckle pattern was applied to the surface which was then recorded by a CCD camera during the deformation. The generated TIF images were analysed with a strain mapping software (VIC 2D) that computed the two-dimensional strain field from the surface deformation. Selected options to evaluate two-dimensional data generated with X-ray imaging and digital image correlation are presented. Combining and correlating these techniques enables detailed analysis of structure-function relationships during swelling (and shrinkage) processes in wood. However, several issues still have to be solved to enhance effectiveness and user-friendliness of such investigations, as elucidated in detail in this paper