This study provides an overview of the implementation of a nonlinear microstructural
constitutive model in ABAQUS employing a user subroutine at the level of the biomedical
engineer. Two different element formulations are employed: a continuum incompressible
and a plane stress incompressible. All examples are validated by performing a number of
deformations on 2D and 3D square elements and comparing the analytical formulation in
a programming language and the user subroutine in ABAQUS. Application models will be
presented that provide a deeper look into the impacts of soft tissue deformation, damage,
and fracture.
Additionally, we investigate the mechanical behavior of skin layers in terms of the nominal stress-strain curve using uniaxial and cyclic loading tests on porcine skin specimens in
two forms: dermis integrating epidermis and hypodermis. Experiments were performed on
specimens from the belly and breast of the pigs and under both orthogonal orientations with
respect to the spine direction. All tests were carried out at room temperature with cyclic
loading at a constant strain rate and increasing stretch increments. Finally, data is fitted
using microstructural constitutive model.
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/19199450 |
| Date | 18 February 2022 |
| Creators | John David Toaquiza Tubon (12089969) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY-NC-SA 4.0 |
| Relation | https://figshare.com/articles/thesis/Finite_Element_Modeling_and_Experimental_Characterization_of_Skin_and_Subcutaneous_Tissue_Damage_and_Fracture/19199450 |
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