Publications

Publications

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.

Rectus Femoris and Vastus Intermedius Fiber Excursions Predicted by Three-Dimensional Muscle Models

Silvia S. Blemker, Scott L. Delp

This paper uses advanced finite-element modeling to build detailed 3D models of two quadriceps muscles, revealing highly variable internal stretching during knee flexion—variations missed by simpler models—improving simulation accuracy.

Three-Dimensional Representation of Complex Muscle Architectures and Geometries

Silvia S. Blemker, Scott L. Delp

This paper presents a method for building detailed 3D finite-element models of hip muscles, capturing fiber arrangement and functional differences. It shows that fibers within a single muscle can have widely varying moment arms, improving the accuracy of movement simulations.