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Effect of test conditions on measured loads and displacements in zero-span testing
Monash University, Australia.
SCA Graphic Research, Sundsvall.
SCA Packaging Research, Sundsvall.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap.
2006 (engelsk)Inngår i: TAPPI Journal, ISSN 0734-1415, Vol. 5, nr 10, s. 3-8Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Single fiber mechanical properties play a critical role in determining sheet mechanical properties, but fiber mechanical properties are rarely measured, because of the time-consuming nature of the tests. Zero-span strength is commonly used as a measure of fiber strength, but the results can vary with the test conditions. Modeling has shown that the load displacement curves are influenced by the thickness-to-span ratio, as there is a heterogeneous stress field in the thickness direction of the sample.

This paper presents data on the effect of grammage on the loads and displacements in zero-span tests. Clamps were designed and made for a displacement-control led load frame. These clamps can test up to 10 plies of papers with,a span length from 0 to 3 mm. For the sake of comparison, tests were made using a commercial zero-span tester, which is load controlled but limited in span length and thickness of the tested material. Both machines were found to give comparable results. Isotropic 65 g/m(2) handsheets, 36 g/m(2) aluminum foil, and 42 g/m(2) greaseproof paper were tested as functions of sheet grammage. An intrinsic zero-span strength was defined as the y-axis intercept of a plot of zero-span strength versus grammage.

Application:This paper demonstrates that the measured zero-span strength is always less than the intrinsic zero-span strength. The results show that, for best results, the grammage of the material tested should be minimized to obtain a measured value that is as close to the intrinsic value as possible.

sted, utgiver, år, opplag, sider
2006. Vol. 5, nr 10, s. 3-8
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-11860ISI: 000241772700001Scopus ID: 2-s2.0-33846403409OAI: oai:DiVA.org:miun-11860DiVA, id: diva2:330482
Konferanse
International Paper Physics Conference, Sep 07, 2003, Victoria, Canada
Merknad

International Paper Physics Conference, Sep 07, 2003, Victoria, Canada

Tilgjengelig fra: 2010-07-15 Laget: 2010-07-15 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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