[{"status":"public","main_file_link":[{"open_access":"1","url":"https://ediss.sub.uni-hamburg.de/handle/ediss/8756 "}],"ddc":["660"],"page":"453","_id":"4919","user_id":"68554","keyword":["density measurement","radiation transmission","porous low-Z composite material","true density","elemental composition and ash content","effective atomic number","mass attenuation coefficient","X-ray energy spectrum","law of attenuation","beam hardening and radiation build-up","radiation-physical interdependencies","Dichtemessung","Durchstrahlung","poröser Verbundwerkstoff","Reindichte","elementare Zusammensetzung und Aschegehalt","effektive Ordnungszahl","Massenschwächungskoeffizient","Röntgenspektrum","Schwächungsgesetz","Strahlaufhärtung und Strahlungsaufbau","strahlungsphysikalische Wechselbeziehungen"],"oa":"1","publisher":"Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky ","language":[{"iso":"eng"}],"alternative_title":["Angewandte Untersuchungen an Holzwerkstoffen im Zusammenhang mit der Dichtemessung mittels Röntgenstrahlung"],"citation":{"short":"K. Solbrig, Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry, Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky , Hamburg , 2019.","ieee":"K. Solbrig, <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky , 2019.","ufg":"<b>Solbrig, Konrad (2019)</b>: Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry, Hamburg .","apa":"Solbrig, K. (2019). <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky .","din1505-2-1":"<span style=\"font-variant:small-caps;\">Solbrig, Konrad</span>: <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg  : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky , 2019","chicago-de":"Solbrig, Konrad. 2019. <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky .","havard":"K. Solbrig, Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry, Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky , Hamburg , 2019.","bjps":"<b>Solbrig K</b> (2019) <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky .","mla":"Solbrig, Konrad. <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky , 2019.","ama":"Solbrig K. <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky ; 2019.","van":"Solbrig K. Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky ; 2019. 453 p.","chicago":"Solbrig, Konrad. <i>Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry</i>. Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky , 2019."},"supervisor":[{"last_name":"Ressel","full_name":"Ressel, Jörg","first_name":"Jörg"},{"full_name":"Thömen, Heiko","last_name":"Thömen","first_name":"Heiko"}],"title":"Applied Investigations on Wood-Based Composites in the Context of X-Ray Densitometry","author":[{"last_name":"Solbrig","id":"59789","full_name":"Solbrig, Konrad","first_name":"Konrad"}],"place":"Hamburg ","type":"dissertation","year":2019,"abstract":[{"text":"AbstractThe industrial production ofwood-based compo-sites (WBCs) features the core processes in theforming and press line,which are characterisedby densification and the curing of resin-blended furnish materialto obtain a panel from a formed mat in a continuous or batch-wise process.Here, the reliable measurement of process parameters and panel properties is indispensablefor moni-toring and controllingproductionand quality.The in-plane area density(𝜌A)of the mat and the raw density(𝜌)of the panel,along withits vertical rawdensity  profile  (RDP),aretypically determined through nondestructivemeans of radiometric de-vices.X-ray  systems  for  density  measurement on  WBCsare commonly  usedin both industry and research. Theyfollow a similar basic princi-pleof radiation transmissionwith specificsetups depending  onthe  measuring  taskat  hand.  De-tector  signalsare  evaluated  regarding relative radiation  transmission,  which  is  well-knownto followBeer’s  law  of  exponential  attenuation.Note here, particular conditions regarding radia-tion  (energyand  beam  geometry)  and  material properties  (consistent  and  homogeneous)  are expected. These conditions, however, cannot be consistently  achieved  in  applied  radiometric  in-vestigationson  WBCs [...]","lang":"eng"},{"text":"AbstractXVIIprovided by the present thesis. The practicalim-plementation,  however,must  consequentlybe performed by the device manufactures. The us-ers of such modern X-raysystems are enabledto obtain enhanced quality of their measuring re-sults,  which  is  relevant  for  both  WBC science(wide  range  of  partly  new  composites)  and  in-dustry (increasing requirements on reliability and accuracy).Eventually,  the properapplication  of capable  nondestructive  evaluation  methods  by valid  and  precise  measuring  systems  for moni-toring and controllingquality and processparam-etersin WBC production offersthe possibility ofachievingsavings  in  raw  materials  and  energy consumption   as    well    as   fundamental   ap-proaches forimprovingWBC production, thus,to optimise  processconditionsand  materialprop-ertiesin general.\r\nKurzfassungDie  industrielle  Produktion  von plattenförmigen Holzwerkstoffen  (HWS) wirdmaßgeblich durchdie  Kernprozessein der Form-und Pressen-straßebestimmt. Die Plattenherstellung ist durch die Verdichtung und Aushärtung von geformten Mattenaus beleimtenHolzpartikelngekenn-zeichnet, was in  kontinuierlichen  oder  taktwei-sen Prozessenerfolgt. Dabei ist diezuverlässige Messung von Prozessparametern und Plattenei-genschaften  fürdieÜberwachung  und  Steue-rung  von  Produktion  und  Qualitätunabdingbar. Die Bestimmung des Flächengewichts(Flächen-dichte 𝜌A)der  Matte  und  der  Rohdichte(𝜌)der Platte   sowie   des vertikalen   Rohdichteprofils (RDP) erfolgt für gewöhnlich zerstörungsfrei mit-tels  radiometrischer  Geräte. Heute  sind sowohl in der Industrie als auch in der Forschung Rönt-gensysteme zur Dichtemessung (Densitometrie) an  Holz  und  Holzwerkstoffen verbreitet.  Deren Grundprinzip zur Durchstrahlung ist ähnlich, wo-hingegen sich der jeweilige Aufbau in Abhängig-keit der Messaufgabeund auch in Bezug auf den Geräteherstellerunterscheidet. Die aus den ge-messenen  Detektorsignalen  ausgewertete  rela-tive  Durchstrahlung kann  durch  das  hinlänglich bekannte Beer’scheGesetzfür die exponentielle Schwächungbeschrieben werden. Die Gültigkeit setzt   bestimmte   Bedingungen   in   Bezug   auf Strahlung  (Energie  und  Strahlgeometrie)  und Materialeigenschaften   (konsistentund   homo-gen)  voraus,  die  bei radiometrischen Untersu-chungen an HWSin der allgemeinen Praxis je-doch  nicht angemessen  erfüllt  werden  können [...]","lang":"ger"}],"date_updated":"2023-03-15T13:49:56Z","publication_status":"published","urn":"urn:nbn:de:gbv:18-ediss-89270","date_created":"2021-02-09T09:31:41Z"}]