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The transverse and longitudinal elastic constants of pulp fibers in paper sheets
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- Czibula, Caterina (author)
- Univ Leoben, Inst Phys, Franz Josef Str 18, A-8700 Leoben, Austria.;Graz Univ Technol, Inst Bioprod & Paper Technol, Inffeldgasse 23, A-8010 Graz, Austria.;Graz Univ Technol, Christian Doppler Lab Fiber Swelling & Paper Perf, Inffeldgasse 23, A-8010 Graz, Austria.
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- Brandberg, August, 1990- (author)
- KTH,Hållfasthetslära,Graz Univ Technol, Christian Doppler Lab Fiber Swelling & Paper Perf, Inffeldgasse 23, A-8010 Graz, Austria.
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- Cordill, Megan J. (author)
- Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria.
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- Univ Leoben, Inst Phys, Franz Josef Str 18, A-8700 Leoben, Austria;Graz Univ Technol, Inst Bioprod & Paper Technol, Inffeldgasse 23, A-8010 Graz, Austria.;Graz Univ Technol, Christian Doppler Lab Fiber Swelling & Paper Perf, Inffeldgasse 23, A-8010 Graz, Austria. Hållfasthetslära (creator_code:org_t)
- 2021-11-17
- 2021
- English.
- In: Scientific Reports. - : Springer Nature. - 2045-2322. ; 11:1
- Journal article (peer-reviewed)
Abstract
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- Cellulose fibers are a major industrial input, but due to their irregular shape and anisotropic material response, accurate material characterization is difficult. Single fiber tensile testing is the most popular way to estimate the material properties of individual fibers. However, such tests can only be performed along the axis of the fiber and are associated with problems of enforcing restraints. Alternative indirect approaches, such as micro-mechanical modeling, can help but yield results that are not fully decoupled from the model assumptions. Here, we compare these methods with nanoindentation as a method to extract elastic material constants of the individual fibers. We show that both the longitudinal and the transverse elastic modulus can be determined, additionally enabling the measurement of fiber properties in-situ inside a sheet of paper such that the entire industrial process history is captured. The obtained longitudinal modulus is comparable to traditional methods for larger indents but with a strongly increased scatter as the size of the indentation is decreased further.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
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- art (subject category)
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