Network Modeling of Paper Materials: a Micromechanical Model to Investigate the Influence of Fiber Properties
2010 (English)Report (Other academic)
A periodic micromechanical modeling concept that utilizes continuum elements and a representative volume element (RVE) loaded with periodic boundary conditions is proposed to study paper network properties. The RVE has a volume of 1 mm3 and consists of fibers that are perfectly bonded. The fiber properties are represented by an isotropic elastic-plastic model that has an additional hardening effect at large strains, which has been observed for single fibers with high fibril angle. As non-linearities are accounted for in the material model, a fairly small number of elements are needed in the RVE to enable predictions of anisotropic fiber network properties, in this work 10×10 10 elements were used. The model has been used to simulate uniaxial tension tests in the three principal directions (MD, CD and ZD). An anisotropic fiber network structure was generated. With this structure, different deformation mechanisms were activated during loading in the different directions.
Place, publisher, year, edition, pages
Stockholm: KTH , 2010. , 16 p.
Trita-HFL, ISSN 1104-6813 ; 0493
IdentifiersURN: urn:nbn:se:kth:diva-24653OAI: oai:DiVA.org:kth-24653DiVA: diva2:352494
QC 201009212010-09-212010-09-212010-09-21Bibliographically approved