Screenshots, images and animation gallery from FEBio. Click on the thumbnails below.

Saddle Problem

Saddle Problem: Two non-conforming saddle-shaped blocks are compressed against each other.

Author: Gerard Ateshian, Columbia University
Two non-conforming saddle-shaped blocks are compressed against each other.

Cell Growth: Beam Buckling

Beam Buckling Stiff: Model exhibiting multiple fold buckling behavior undergoing cell growth. Buckling is an instability that may exhibit multiple modes. For this Model, the Young's modulus of a solid mixture neo-hookean beam is increased to 10 kPa. Both ends of the beam are fixed, the resulting buckling behavior exhibits multiple folding undergoing cell growth.
Author: Gerard Ateshian, Columbia University

Model exhibiting multiple fold buckling behavior undergoing cell growth. Buckling is an instability that may exhibit multiple modes. For this Model, the Young’s modulus of a solid mixture neo-hookean beam is increased to 10 kPa. Both ends of the beam are fixed, the resulting buckling behavior exhibits multiple folding undergoing cell growth.

Normal Hip Pressures

Normal Hip Pressures: Model of a normal hip illustrating femoral and acetabular cartilage pressures during walking. The model was generated from CT images of a person with a normal hip. By creating these subject-specific finite element models of normal hips and hips from patients who have dysplasia we will be able to compare the cartilage stresses in normal and dysplastic hips during activities of normal daily living.
Author: Corinne Henak, University of Utah

Model of a normal hip illustrating femoral and acetabular cartilage pressures during walking. The model was generated from CT images of a person with a normal hip. By creating these subject-specific finite element models of normal hips and hips from patients who have dysplasia we will be able to compare the cartilage stresses in normal and dysplastic hips during activities of normal daily living.

Dysplastic Patient Hip Pressures

Dysplastic Patient Hip Pressures: Dysplastic hip illustration for femoral and acetabular cartilage pressures during walking.
Author: Corinne Henak, University of Utah

Dysplastic hip illustration for femoral and acetabular cartilage pressures during walking.

Left Ventricle

Left Ventricle:Model of the left ventricle of the heart showing the fiber strains during diastole and systole. The passive filling of diastole is simulated by applying a pressure within the left ventricle. The contraction during systole is generated by the active contraction material available within FEBio. The fiber strains results from FEBio where verified with experimental results and the results from another finite element code.
Left Ventricle: Model of the left ventricle of the heart showing the fiber strains during diastole and systole. The passive filling of diastole is simulated by applying a pressure within the left ventricle. The contraction during systole is generated by the active contraction material available within FEBio. The fiber strains results from FEBio where verified with experimental results and the results from another finite element code.

Hip Kinematics

Hip Kinematics: Total Hip Replacement and Hip capsule: Model of a total hip replacement and hip capsule illustrating the strains that develop in the capsule right before dislocation. The capsular soft tissues are represented with a neo-Hookean material and the total hip components are represented with rigid bodies. The kinematics driving the model are applied at the femoral component and the cup and liner are fully constrained. Contact between the hip capsule and cup is enforced using the penalty method.
Total Hip Replacement and Hip capsule: Model of a total hip replacement and hip capsule illustrating the strains that develop in the capsule right before dislocation. The capsular soft tissues are represented with a neo-Hookean material and the total hip components are represented with rigid bodies. The kinematics driving the model are applied at the femoral component and the cup and liner are fully constrained. Contact between the hip capsule and cup is enforced using the penalty method.

Ear Model

Ear Model: The video shows the deformation of the tympanic membrane, pars flaccida and middle ear ossicles under a static pressure load of 20kPa. The tympanic membrane and pars flaccida are modeled using a Veronda-Westman hyperelastic material; the ossicles are considered rigid. The middle-ear modeling was done at the Biomedical Physics Lab, University of Antwerp, and the Departments of BioMedical Engineering and Otalaryngology, McGill University.
Author: University of Antwerp

The video shows the deformation of the tympanic membrane, pars flaccida and middle ear ossicles under a static pressure load of 20kPa. The tympanic membrane and pars flaccida are modeled using a Veronda-Westman hyperelastic material; the ossicles are considered rigid. The middle-ear modeling was done at the Biomedical Physics Lab, University of Antwerp, and the Departments of BioMedical Engineering and Otalaryngology, McGill University.

Shoulder Capsule

Shoulder Capsule Subjected to a Clinical Exam: 3D model of a shoulder illustrating the Von Mises stresses in the capsule during a clinical exam. The capsule tissue is represented with a Veronda-Westmann material while the glenoid and humerus are represented with rigid bodies. The kinematics are applied at the humerus and the scapula is fully constrained. Contact between the capsule and humerus is enforced using the penalty method.
Author: Benjamin Ellis, University of Utah

Shoulder Capsule Subjected to a Clinical Exam: 3D model of a shoulder illustrating the Von Mises stresses in the capsule during a clinical exam. The capsule tissue is represented with a Veronda-Westmann material while the glenoid and humerus are represented with rigid bodies. The kinematics are applied at the humerus and the scapula is fully constrained. Contact between the capsule and humerus is enforced using the penalty method.

Finger Extensor Hood

Index Finger Extensor Hood: Model of the extensor hood showing the Von Mises stress with a 45˚ proximal interphalangeal joint angle, a 30˚ distal interphalangeal joint angle, and 12 Newtons applied to the Extensor Digitorum Communis. The extensor hood is discretized with shell elements and represented with a St. Venant-Kirchhoff constitutive equation, while the bones are represented with rigid bodies. Contact between the hood and bones is enforced using an augmented-Lagrangian routine.
Author: Benjamin Ellis, University of Utah

Index Finger Extensor Hood: Model of the extensor hood showing the Von Mises stress with a 45˚ proximal interphalangeal joint angle, a 30˚ distal interphalangeal joint angle, and 12 Newtons applied to the Extensor Digitorum Communis. The extensor hood is discretized with shell elements and represented with a St. Venant-Kirchhoff constitutive equation, while the bones are represented with rigid bodies. Contact between the hood and bones is enforced using an augmented-Lagrangian routine.

Walking with Friction

 2D Foot Walking with Friction: Plane-strain model of a foot undergoing the stance phase of gait from heel-strike to toe-off. The arrows indicate the reaction forces caused by contact between the foot and floor. A friction coefficient of 0.5 is used for this contact and the contact is enforced using an augmented-Lagrangian routine. The soft tissues of the foot are represented with an Ogden material while the bones are modeled as rigid bodies. The kinematics that drive the model are applied at the calcaneus.
Author: University of Utah

2D Foot Walking with Friction: Plane-strain model of a foot undergoing the stance phase of gait from heel-strike to toe-off. The arrows indicate the reaction forces caused by contact between the foot and floor. A friction coefficient of 0.5 is used for this contact and the contact is enforced using an augmented-Lagrangian routine. The soft tissues of the foot are represented with an Ogden material while the bones are modeled as rigid bodies. The kinematics that drive the model are applied at the calcaneus.

3-D Foot Model

3-D Model of a Foot: 3D model of a foot showing the pressure patterns that develop on the bottom of the foot while standing. The soft tissues of the foot are represented with an Ogden material and the bones (not shown) are represented with rigid bodies. The kinematics driving the model are applied at the calcaneus and the floor (not shown) is fully constrained. Contact between the foot and floor is enforced using an augmented-Lagrangian routine.
Author: Ahmet Erdemir

3-D Model of a Foot: 3D model of a foot showing the pressure patterns that develop on the bottom of the foot while standing. The soft tissues of the foot are represented with an Ogden material and the bones (not shown) are represented with rigid bodies. The kinematics driving the model are applied at the calcaneus and the floor (not shown) is fully constrained. Contact between the foot and floor is enforced using an augmented-Lagrangian routine.

Normal Hip

Normal Hip Pressures: Model of a normal hip illustrating femoral and acetabular cartilage pressures during walking. The model was generated from CT images of a person with a normal hip. By creating these subject-specific finite element models of normal hips and hips from patients who have dysplasia we will be able to compare the cartilage stresses in normal and dysplastic hips during activities of normal daily living.
Author: University of Utah

Normal Hip Pressures: Model of a normal hip illustrating femoral and acetabular cartilage pressures during walking. The model was generated from CT images of a person with a normal hip. By creating these subject-specific finite element models of normal hips and hips from patients who have dysplasia we will be able to compare the cartilage stresses in normal and dysplastic hips during activities of normal daily living.