Mechanical Characterization of Brain Tissue in Compression

Abstract

The biomechanical behavior of brain tissue is needed for predicting the traumatic brain injury (TBI). Each year over 1.5 million people sustain a TBI in the United States. The appropriate coefficients for modeling the injury prediction can be evaluated using experimental data. In the present paper, using an experimental setup on bovine brain tissue, unconfined compression tests at quasi-static strain rates of ε. = 0.0004s−1, 0.008s−1 and 0.4s−1 combined with a stress relaxation test under unconfined uniaxial compression with ε. = 0.67s−1 ramp rate are performed. The fitted visco-hyperelastic parameters were utilized by using obtained stress-strain curves. The finite element analysis (FEA) is validated using experimental data.

Nonlinear time delay estimation based model reference adaptive impedance control for an upper-limb human-robot interaction

“…The Gearboxes have three stages and the maximum intermittent torque at gear output is 45 Nm. The ATI Mini45 sensor, which its resolutions are F x , F y = 1 8 N, and capable of measuring 6145N in each direction, is used for sensing the applied force to the robotic system. The sensor is located on the end-effector.…”

“…The body limb disability traumas such as spinal cord injury, brain injury, 1 and stroke can lead to nervous system damages, causing loss of upper, and lower limb disabilities. The traditional rehabilitation training process extensively relies on medical experts' experiences, and it requires physical activity for both the patient and the expert.…”

A selective smoothed finite element method with visco‐hyperelastic constitutive model for analysis of biomechanical responses of brain tissues

“…This example shows the advantages of Selective S‐FEMs by comparison with newly published papers. Recently, brain tissue using visco‐hyperelastic constitutive model has been researched in many groups, 84‐87 and the corresponding material parameters are listed in Table 3.…”

“…The contact force of the rigid plate calculated by Selective ES/NS‐FEM. Liu et al, 87 shafiee et al 86 and Ho et al 85 [Color figure can be viewed at wileyonlinelibrary.com]…”

A Parametric Study of Mechanical Cross-Coupling in Parallel-Kinematics Piezo-Flexural Nano-Positioning Systems

“…Figure16. The effect of decreasing the hinge's thickness in the y-direction on the mechanical cross-coupling effect (comparison between Case 1 and 7).…”