Parametric Modeling and Micromechanical Analysis

of a 2×2 Twill Carbon Fiber Composite

The mechanical behavior of textile composites is governed not only by the properties of fibers and matrix, but also by the architecture of the weave.

Textile architecture generation and mesh preparation for periodic RVE finite element simulations.
parametric design + textile composite + micromechanics

Twill Carbon Fiber Composite

Widely used in high-performance composite structures.

Compared with plain weave fabrics, the twill offers:

Lower fiber crimp, resulting in improved stiffness
Better drapability, allowing the fabric to conform to curved molds
Improved surface finish, commonly used in visible carbon structures
Enhanced load transfer along primary fiber directions

Woven fibres

Resin matrix

Computational Textile Model

A representative volume element (RVE) of the woven architecture was generated using Texture Generation, a specialized software for textile composite modeling.

Fiber volume fraction ≈ 0.6126

Tensile strength ≥ 3500 MPa

Elastic modulus ≈ 230 GPa

Areal weight ≈ 200 g/m²

Fabric thickness ≈ 0.25 – 0.35 mm

Periodic Micromechanical Simulation

The RVE mesh is prepared for periodic boundary condition (PBC) simulations, enabling the prediction of effective composite properties.

Periodic boundary conditions ensure that the unit cell behaves as part of an infinite repeating textile structure.

Using this framework, finite element simulations can be performed to determine:

Effective stiffness and Stress distribution within yarns and matrix.

Texture Generation → mesh → FEM workflow
The yarns are modeled as orthotropic materials with a dominant longitudinal stiffness E11 aligned with the fiber direction (E11 ≫ E22, E33), whereas the surrounding matrix phase is described as an isotropic material with a comparatively low elastic modulus E.

Such micromechanical simulations allow engineers to link

textile architecture to macroscopic composite performance.

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