A simplified finite element model for draping of woven material

Abstract

A model for draping of woven fabric is described which is intermediate to the two main approaches currently used, kinematic modelling and comprehensive finite element modelling. The approach used is a simple unit-cell finite element model, with the fabric modelled by a network of simple truss elements, connected across the 'diagonals' by soft elements to mimic the shear stiffness of the material. Bias extension tests on dry fabric are used both to calibrate and validate the model. The model is then used to simulate draping of an ellipsoid. The capability of the model is illustrated by construction of a simple process optimisation map for this geometry. q

A multiscale quasicontinuum method for dissipative lattice models and discrete networks

“…Also the QC formulation of Beex et al (2011), developed for structural lattice models with elastic interactions only, uses this ansatz. Depending on the application, such an elastic description is adequate (Delincé and Delannay, 2004;Sharma and Sutcliffe, 2004;Gonella and Ruzzene, 2008;Hatami-Marbini and Picu, 2009;Zeman et al, 2011). For many applications however, more advanced descriptions of lattice interactions are required that include dissipation in the lattice interactions by e.g.…”

“…In this way the mechanical response of the lattice more or less corresponds to a general response of lattice models for woven fabrics (Sharma and Sutcliffe, 2004;Beex et al, 2013). In such lattice models, the relatively stiff horizontal and vertical interactions represent two families of yarns and the compliant diagonal trusses represent the rotational stiffness between the two families of yarns.…”

Simulation of 3D interlock composite preforming

“…The FE analysis is then concerned with those elements that are in contact or are linked by springs [23][24][25][26][27][28][29][30]. The advantage over the continuous approach is that description of internal structure of the reinforcement naturally accounts for some aspects of the material, such as directions of fibers and contact between fibers.…”

Higher‐order quasicontinuum methods for elastic and dissipative lattice models: uniaxial deformation and pure bending

“…Lattice models in which springs and beams are used to represent individual fibre segments and yarn segments can be used to investigate fibrous materials. Examples are the lattice models of [1][2][3][4] for (electronic) textiles, those of [5][6][7][8] for paper materials, those of [9,10] for fibre glass materials and those of [11,12] for scaffolds for tissue engineering. The simplicity to incorporate fracture probably forms an important reason for the frequent use of lattice models, which has also led to their use for heterogeneous materials [13][14][15].…”

“…The simplicity to incorporate fracture probably forms an important reason for the frequent use of lattice models, which has also led to their use for heterogeneous materials [13][14][15]. Two other advantages of the use of lattice models for fibrous materials are the ease of incorporating large fibre re-orientations [1,2,4], which is not trivial to include in continuum descriptions [16], and the possibility of modelling fibre-to-fibre bond failure [5][6][7].…”