A Constitutive Model For the Warp-Weft Coupled Non-linear Behavior of Knitted Textiles With Potential Use in Tissue Regenerative Implants
نویسندگان
چکیده
Knitted textiles have been used in medical applications due to their high flexibility and low tendency to fray. Their mechanics has, however, received limited attention compared to woven fabrics used as technical textiles e.g. in aerospace and as composite reinforcements. A constitutive model for soft tissue using a strain energy function was extended, by including shear and increasing the number and order of coefficients, to represent the non-linear warpweft coupled mechanics of coarse textile knits under uniaxial tension. The novel constitutive relationship with ten coefficients was implemented in a commercial finite element package. The model and its implementation were verified and validated for uniaxial tension and simple shear using singleand multi-element patch tests and data of physical uniaxial tensile tests of four different knitted fabrics, respectively. The numerically predicted stress-strain curves exhibited non-linear stiffening, characteristic for fabrics and confirmed experimentally for
منابع مشابه
A constitutive model for the warp-weft coupled non-linear behavior of knitted biomedical textiles.
Knitted textiles have been used in medical applications due to their high flexibility and low tendency to fray. Their mechanics have, however, received limited attention. A constitutive model for soft tissue using a strain energy function was extended, by including shear and increasing the number and order of coefficients, to represent the non-linear warp-weft coupled mechanics of coarse textil...
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