期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 160, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2021.104743
关键词
Paper mechanics; Viscoplasticity; Viscoelasticity; Diffusion; Finite deformation; Logarithmic strains; Paper curl
资金
- Austrian Federal Ministry for Digital and Economic Affairs
- National Foundation for Research Technology and Development
- Mondi Group
- Canon Production Printing
- Kelheim Fibres GmbH
- SIG Combibloc Group AG
This paper proposes a mechanical model that captures the transient behavior of paper during interaction with water. The model is derived in a thermodynamically consistent manner and is validated through experiments on paper curl. It provides further insights into complex multi-physics problems.
Paper is a versatile material, which is known of being very sensitive to moisture changes that make the mechanical behavior hard to predict. To close this gap, we propose a mechanical model that captures the transient behavior during the interaction with water. Since the diffusion of water within the paper network happens on a similar time scale as the mechanical relaxation phenomena, a fully coupled theory is motivated. Furthermore, the absorbed water induces a large increase in volume which motivates the application of finite strain theory. The model is derived in a thermodynamically consistent manner and its parameters are estimated with experiments available in the literature. The model shows a good agreement applied to paper curl experiments and provides further insights into complex multi-physics problems.
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