Brischke, Christian

[["dc.bibliographiccitation.artnumber","199"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Emmerich, Lukas"],["dc.contributor.author","Wülfing, Georg"],["dc.contributor.author","Brischke, Christian"],["dc.date.accessioned","2019-07-09T11:50:10Z"],["dc.date.available","2019-07-09T11:50:10Z"],["dc.date.issued","2019"],["dc.description.abstract","The structural integrity of wood is closely related to its brittleness and thus to its suitability for numerous applications where dynamic loads, wear and abrasion occur. The structural integrity of wood is only vaguely correlated with its density, but affected by different chemical, physico-structural and anatomical characteristics, which are difficult to encompass as a whole. This study aimed to analyze the results from High-Energy Multiple Impact (HEMI) tests of a wide range of softwood and hardwood species with an average oven-dry wood density in a range between 0.25 and 0.99 g/cm3 and multifaceted anatomical features. Therefore, small clear specimens from a total of 40 different soft- and hardwood species were crushed in a heavy vibratory ball mill. The obtained particles were fractionated and used to calculate the ‘Resistance to Impact Milling (RIM)’ as a measure of the wood structural integrity. The differences in structural integrity and thus in brittleness were predominantly affected by anatomical characteristics. The size, density and distribution of vessels as well as the ray density of wood were found to have a significant impact on the structural integrity of hardwoods. The structural integrity of softwood was rather affected by the number of growth ring borders and the occurrence of resin canals. The density affected the Resistance to Impact Milling (RIM) of neither the softwoods nor the hardwoods."],["dc.identifier.doi","10.3390/f10020199"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15877"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59718"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","1999-4907"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.title","The Impact of Anatomical Characteristics on the Structural Integrity of Wood"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1431"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Wood Science and Technology"],["dc.bibliographiccitation.lastpage","1450"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Niklewski, J."],["dc.contributor.author","Brischke, C."],["dc.contributor.author","Frühwald Hansson, E."],["dc.contributor.author","Meyer-Veltrup, L."],["dc.date.accessioned","2019-07-09T11:50:37Z"],["dc.date.available","2019-07-09T11:50:37Z"],["dc.date.issued","2018"],["dc.description.abstract","The effects of weathering on the in-service moisture behavior of wood have received only limited attention so far, with much focus being on the effect of photodegradation on the hydrophobicity of the wood surface. The objective of the present study was to examine the effect of weathering surfaces on the overall moisture behavior of wood specimens exposed to short-term cyclic spraying, with special emphasis on the surface conditions involved. Specimens cut from eight different species including hardwoods and softwoods were weathered for 8 years and continuously monitored during a single-sided cyclic spraying together with a set of axially matched controls. After each spray cycle, the duration of surface wetness was evaluated by resistance moisture sensors as well as an optical approach (colorimetric) based on time-lapse images. The moisture content in the core was monitored simultaneously by use of resistance moisture sensors. The optical method correlated well with the electrical resistance measurements and provided a simple and practical measure of the areal distribution of the surface wetness. The results showed specimens with a weathered surface to sustain a wet surface for about twice the duration of their axially matched control. A considerable, albeit smaller, effect was also observed deeper in the core. By adapting the length of the wet period on the exposed boundary, the corresponding response at the core of the Norway spruce specimens was reproduced numerically."],["dc.identifier.doi","10.1007/s00226-018-1044-8"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15977"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59808"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.title","Moisture behavior of weathered wood surfaces during cyclic wetting: measurements and modeling"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]