Transversely isotropic hyperelastic laws for 2D FEM modeling of human thoracic spine ligaments.

ABSTRACT: A comparative analysis of three transversely isotropic hyperelastic constitutive laws is presented to characterize the mechanical behavior of spinal ligaments within finite element simulations. In each material model, the total strain energy is partitioned into ground‑matrix and fiber contributions. The ground‑matrix response was represented by three strain‑energy functions, Neo‑Hookean, Mooney‑Rivlin, and Yeoh, whereas the fiber response was captured by a fourth‑order polynomial. Constitutive parameters were calibrated against experimental uniaxial tension data from human thoracic spinal ligaments. The models were implemented via user‑defined material subroutines in Abaqus and LS‑Dyna and evaluated with finite shell elements. Performance of the afore-mentioned constitutive laws was assess

SUBMITTER: Wiczenbach T 

PROVIDER: S-EPMC12606164 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature