Abstract
An algorithm combining Micro-CT slice auxiliary calibration and kinematic modeling method is proposed to automatically generate yarns with irregular cross-sections and central paths for 2.5D woven SiO2f/SiO2 composites. The initial boundary conditions of the kinematic modelling simulation are calibrated by extracting the yarn positions from the corresponding Micro-CT slices. The simulation parameters with the real physical meanings are also determined in the kinematic modelling calculation. An explicit contact algorithm for truss elements in the kinematic modelling simulation with the calibration boundary conditions is employed to calculate nodal displacement. The virtual geometry of 2.5D woven SiO2f/SiO2 composites including detailed geometry information such as irregular yarn cross-section and yarn waviness or crimp can be reconstructed, which are in good agreement with the yarn geometry structures observed in Micro-CT scanning slices. The reconstructed geometry model can reflect the change of textile configurations during weaving and solidification process. The developed high-fidelity modelling method can also be used to reconstruct the geometry model of other textile composites with complex meso-structures.
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