Brøndsted, Povl

Chapelle, Lucie

Foldschack, M. R.

Kusano, Yukihiro

Lévesque, M.

Numerical models generating actual fiber architecture by including parameters such as the fiber geometry and arrangement are a powerful tool to explore the relation between the fiber architecture and mechanical properties. The generation of virtual architectures of fibrous materials is the first step toward the computation of their physical properties. In this work, a realistic 3D model is developed to describe the architecture of a complex fiber structure. The domain of application of the model could include natural fibers composites, wood fibers materials, papers, mineral and steel wools and polymer networks. The model takes into account the complex geometry of the fiber arrangement in which a fiber can be modeled with a certain degree of bending while keeping a main fiber orientation. The model is built in two steps. First, fibers are generated as a chain of overlapping spheres or as a chain of overlapping sphero-cylinders. At the end of the first step, a system of overlapping fibers is obtained. In order to obtain a hard-core configuration where fibers cannot overlap other fibers, we use an iterative method called the force-biased algorithm. It applies virtual forces on each point of the fiber: a repulsion force to suppress the overlap between two fibers and a bending and stretching force to ensure that the fiber structure is kept unchanged. The model can be used as the geometrical basis for further finite-element modelling

Online Research Database In Technology

Generation of non-overlapping fiber architecture

Lévesque, Martin

PolyPublie

http://orbit.dtu.dk/ws/files/118355606/Generation_of_non_overlapping_fiber_architecture_paper.pdf

Generation of non-overlapping fiber architecture

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Online Research Database In Technology

PolyPublie