Biomechanical

Publications

Finite Element Modeling Used to Study Stress Distribution on the Foot

This paper develops a patient-specific finite element model of the forefoot from MRI scans to study stress distribution during walking. It compares internal stresses in diabetic vs. non-diabetic feet, offering insight into how anatomical and material changes influence injury risk.

Design and Application of a Test System for Viscoelastic Characterization of Collagen Gels

This research presents a new testing device designed to measure the viscoelastic properties of collagen gels, which are widely used in tissue engineering. Using a combination of physical experiments and finite element analysis, the study quantifies how the stiffness and energy dissipation of the gels change with different collagen concentrations and loading speeds. This work provides a crucial biomechanical framework for understanding and controlling the properties of engineered tissues.

Validation of Bone Strains and Cartilage Contact Stress in a 3D FEM of the Human Hip

This paper validates a patient-specific finite element model of the human hip by showing that its predictions closely match real-world experimental data. By measuring both bone strain and cartilage contact stress in cadaveric hips and simulating the same conditions, the researchers confirmed the accuracy of their computational biomechanics approach. A key conclusion is that for accurate contact stress analysis, the bones must be modeled as deformable structures.

Implementing Capsule Representation in a Total Hip Dislocation Finite Element Model

This paper enhances a finite element model of hip replacement by adding a 3D soft-tissue capsule, showing it increases joint stability 3.6 times compared to hardware-only models, improving analysis of surgical techniques and implant design.

Noninvasive Measurement of Meniscus Strain Using MRI and Hyperelastic Warping

This paper validates a novel biomechanical technique called Hyperelastic Warping that uses MRI scans to noninvasively measure strain inside the knee meniscus. By comparing the method's results to a known solution from a computer simulation, the researchers demonstrate that it can accurately map how the meniscus deforms under load. This technology provides a powerful and accurate tool for studying knee joint mechanics without the need for invasive measurement techniques.