Open AccessJournal Article
In-plane fracture toughness testing of paper using thermography
TLDR
In this paper, the temperature distribution of a paper sheet during fracture toughness testing was successively observed as a series of color images by means of an infrared thermography system with close-up lens.Abstract:
The temperature distribution of a paper sheet during fracture toughness testing was successively observed as a series of color images by means of an infrared thermography system with close-up lens. No stress concentration accompanied by plastic deformation occurs within the deep double-edge notched tension specimen except around notch tips. A uniformly and plastically deformed region develops from notch tips at the second half of the testing period and becomes a circular plastically deformed region on the ligament just before final sheet failure, irrespective of beating degree. A stable crack has started to grow from notch tips at latest at the point of maximum load. Application: The thermography is a good tool to examine the new testing methods for strenghth properties.read more
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Journal ArticleDOI
How cracks are hot and cool: a burning issue for paper
Renaud Toussaint,Olivier Lengliné,Olivier Lengliné,Stéphane Santucci,Stéphane Santucci,Tom Vincent-Dospital,Muriel Naert-Guillot,Knut Jørgen Måløy,Knut Jørgen Måløy +8 more
TL;DR: This work directly relates the temperature field around a moving crack tip to the part α of mechanical energy converted into heat, and shows that (self-generated) heat accumulation could weaken the authors' samples by microfiber combustion, and lead to a fast crack/dynamic failure/regime.
Journal ArticleDOI
Deformation and fracture of paper during the in-plane fracture toughness testing: Examination of the essential work of fracture method
A. Tanaka,T. Yamauchi +1 more
TL;DR: In this paper, the essential work of fracture (EWF) method is applied to various machine-made papers and the deforming and fracturing processes of the paper samples during testing is analyzed by means of the thermographic observation.
Journal ArticleDOI
Time-dependent mechanisms in fracture of paper
TL;DR: In this article, a hypothesis for the time-dependent mechanisms underlying the mechanical behavior of commercial bond paper, a fibrous material, is proposed based on an examination of the fracture morphology.
Journal ArticleDOI
Thermographical Analysis of Paper During Tensile Testing and Comparison to Digital Image Correlation
Anton Hagman,Mikael Nygårds +1 more
TL;DR: In this paper, it was shown that an overlaid compaction of the paper was created during the creping process and during tensile testing this was recovered as the paper network structure was strained.
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