期刊
HOLZFORSCHUNG
卷 66, 期 8, 页码 973-979出版社
WALTER DE GRUYTER & CO
DOI: 10.1515/hf-2011-0192
关键词
compression; in situ tests; Norway spruce; synchrotron-based tomographic microscopy (SbTM); synchrotron radiation micro computed tomography (SR mu CT)
资金
- European Cooperation in the field of scientific and technical research (COST) [Action FP0802]
To understand better the structure-property relationships of wood in situ, nondestructive synchrotron-based tomographic microscopy (SbTM) with subcellular resolution is useful. In this context, an in situ testing device was developed to determine the cellular response of wood to mechanical loading. Different rotationally symmetric specimens were tested to synchronize the failure areas to the given scanning areas. Norway spruce samples were uniaxially compressed in the longitudinal direction and scanned in situ at several increasing relative forces ending up in the plastic deformation regime. A sufficiently high quality in situ tomography was demonstrated. The reconstructed data allowed the observation of the load-dependent development of failure regions: cracks and buckling on the microstructure were clearly visible. Future investigations with SbTM on different wood species, loading directions, and different moisture contents are promising in terms of the micromechanical behavior of wood.
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