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Statements

Subject Item
n2:RIV%2F68378297%3A_____%2F14%3A00433992%21RIV15-MK0-68378297
rdf:type
n16:Vysledek skos:Concept
rdfs:seeAlso
http://hdl.handle.net/11104/0238193
dcterms:description
The article presents a conception and prototype of a new diagnostic tool for in-situ evaluation of wood inbuilt into constructions. Current techniques and tools for structural assessment miss the solution that enables measuring of mechanical properties of wood with help of semi-destructive approach that focuses on longitudinal wood properties in a pre-drilled hole. The proposed device uses the principle of pushing jaws (“mini compression test) apart from each other in drilled hole of 12mm diameter to get as close as possible to pure compression loading mode in a laboratory. The measurement can be carried out in arbitrary depth in a wooden beam. The output from the device is the conventional strength and the modulus of deformability in compression (MODL) parallel to fiber direction. The principle implemented in the new device was tested both ways the experimental and numerical based finite element analysis. Numerical analyses based on probabilistic approach were performed in ANSYS computational software. Results show an influence of material elastic properties on output measured force that is being measured by the proposed device. The longitudinal modulus of elasticity has the strongest impact on the output force (correl. coeff. 0.96); the radial and tangential moduli and also shear moduli have negligible influence (coeff. lower then 0.1). Experimental determination of the same correlations was done for both loaded and not loaded beam that had real-size dimensions (cross-section was 200x240 mm). Correlations between in-situ and laboratory tests were also generally strong (0.8-0.92), so we can claim the measurement with use of the new device predict the material property very well. Lastly, the preliminary study of the compression in a drilled hole was studied with use of digital image correlation (DIC). This returned information about the imprint of the jaws into the wood and strain distribution around the hole. The article presents a conception and prototype of a new diagnostic tool for in-situ evaluation of wood inbuilt into constructions. Current techniques and tools for structural assessment miss the solution that enables measuring of mechanical properties of wood with help of semi-destructive approach that focuses on longitudinal wood properties in a pre-drilled hole. The proposed device uses the principle of pushing jaws (“mini compression test) apart from each other in drilled hole of 12mm diameter to get as close as possible to pure compression loading mode in a laboratory. The measurement can be carried out in arbitrary depth in a wooden beam. The output from the device is the conventional strength and the modulus of deformability in compression (MODL) parallel to fiber direction. The principle implemented in the new device was tested both ways the experimental and numerical based finite element analysis. Numerical analyses based on probabilistic approach were performed in ANSYS computational software. Results show an influence of material elastic properties on output measured force that is being measured by the proposed device. The longitudinal modulus of elasticity has the strongest impact on the output force (correl. coeff. 0.96); the radial and tangential moduli and also shear moduli have negligible influence (coeff. lower then 0.1). Experimental determination of the same correlations was done for both loaded and not loaded beam that had real-size dimensions (cross-section was 200x240 mm). Correlations between in-situ and laboratory tests were also generally strong (0.8-0.92), so we can claim the measurement with use of the new device predict the material property very well. Lastly, the preliminary study of the compression in a drilled hole was studied with use of digital image correlation (DIC). This returned information about the imprint of the jaws into the wood and strain distribution around the hole.
dcterms:title
A new diagnostic device for in-situ determination of conventional strength and modulus of deformability in compression of wood parallel to fiber A new diagnostic device for in-situ determination of conventional strength and modulus of deformability in compression of wood parallel to fiber
skos:prefLabel
A new diagnostic device for in-situ determination of conventional strength and modulus of deformability in compression of wood parallel to fiber A new diagnostic device for in-situ determination of conventional strength and modulus of deformability in compression of wood parallel to fiber
skos:notation
RIV/68378297:_____/14:00433992!RIV15-MK0-68378297
n3:aktivita
n10:P
n3:aktivity
P(DF11P01OVV001), P(LO1219)
n3:dodaniDat
n7:2015
n3:domaciTvurceVysledku
n4:7584156 n4:3184285
n3:druhVysledku
n17:O
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
889
n3:idVysledku
RIV/68378297:_____/14:00433992
n3:jazykVysledku
n14:eng
n3:klicovaSlova
semi-destructive device; in-situ measurement; finite element analysis; compression
n3:klicoveSlovo
n5:in-situ%20measurement n5:compression n5:semi-destructive%20device n5:finite%20element%20analysis
n3:kontrolniKodProRIV
[816C757329ED]
n3:obor
n13:JN
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n12:LO1219 n12:DF11P01OVV001
n3:rokUplatneniVysledku
n7:2014
n3:tvurceVysledku
Kunecký, Jiří Tippner, J. Sebera, V. Kloiber, Michal