An anisotropic fibre-network model for mechano-sorptive creep in paper
2008 (English)In: International Journal of Solids and Structures, ISSN 0020-7683, E-ISSN 1879-2146, Vol. 45, no 22-23, 5765-5787 p.Article in journal (Refereed) Published
In this paper a simplified network model for mechano-sorptive creep is presented, which is a further development of an earlier paper [Strombro, J., Gudmundson, P., 2008. Mechanosorptive creep under compressive loading - a micromechanical model. International journal of Solids and Structures 45 (9), 2420-2450.]. It is assumed that the anisotropic hygro-expansion of the fibres leads to large stresses at the fibre bonds when the moisture content changes. The resulting stress state will accelerate creep if the fibre material obeys a constitutive law that is non-linear. Fibre kinks are included in order to capture experimental observations of larger mechano-sorptive effects in compression than in tension. Moisture dependent material parameters and anisotropy in the fibre distribution have been introduced. Theoretical predictions based on the model are compared to experimental results for an anisotropic paper both under tensile and compressive loading at varying moisture content and it is found that the important features in the experiments are captured by the model. Different kinds of drying conditions have also been examined.
Place, publisher, year, edition, pages
2008. Vol. 45, no 22-23, 5765-5787 p.
Mechano-sorptive creep, Accelerated creep, Paper, Modelling, Moisture changes, Humidity change, Sorption, Fibres, Creep, Network model, Fibre network, Mathematical model, Fibre bonding, Tension, Compression, Anisotropy
Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-7946DOI: 10.1016/j.ijsolstr.2008.06.010ISI: 000260273300008ScopusID: 2-s2.0-51649092462OAI: oai:DiVA.org:kth-7946DiVA: diva2:13132
QC 20100910. Uppdaterad från submitted till published (20100910).2008-01-312008-01-312010-09-10Bibliographically approved