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Computational Modeling Of Percolation Conduction And Diffusion Of Heterogeneous Materials, Jian Qiu
Computational Modeling Of Percolation Conduction And Diffusion Of Heterogeneous Materials, Jian Qiu
Electronic Theses and Dissertations
Heterogeneous materials provide a unique combination of desirable mechanical, thermal or electrical properties. This dissertation presents several micro-structure modeling approaches to predict the effective properties of heterogeneous materials and demonstrates its certain application toward two highly heterogeneous, unconventional structural composite materials (carbon fiber reinforced composite materials and graphene nanoplatelets composite). By using the efficient computational algorithm based on the FEA, a randomly oriented disk-shaped particles system are generated. A new element partition scheme based on the vector operations and geometry of inclusion has been implemented to mesh the intersected disks. The computed equivalent conductivity is expressed as a power-law function …
Segmental Movement Compensations In Patients With Transtibial Amputation Identified Using Angular Momentum Separation, Brecca M. M. Gaffney
Segmental Movement Compensations In Patients With Transtibial Amputation Identified Using Angular Momentum Separation, Brecca M. M. Gaffney
Electronic Theses and Dissertations
Patients with unilateral dysvascular transtibial amputation (TTA) adopt movement compensations that are required to maintain balance and achieve ambulation in the absence of ankle plantar flexion, and result in increased and asymmetric joint loading patterns. As a result, this population is at an increased risk of overuse injuries, such as low back pain (LBP). Clinical gait analysis is used to guide diagnostics in movement retraining following amputation, and is performed using instrumented (research based) or observational analyses (clinically based). However, instrumented analyses are currently impractical in most clinical settings due to expense and computational limitations. This dissertation presents the use …
Six Degrees Of Freedom: Kinematics Of The Healthy Ankle Syndesmosis Joint, Veronica A. Hogg-Cornejo
Six Degrees Of Freedom: Kinematics Of The Healthy Ankle Syndesmosis Joint, Veronica A. Hogg-Cornejo
Electronic Theses and Dissertations
Syndesmotic injury, more commonly known as a "high ankle sprain", accounts for over 12% of all ankle sprain incidents in the US; of which, over 25% occur during a sporting activity. Typically, harm to the syndesmosis occurs in sports such as football, soccer, lacrosse, and hockey where it is common for an athlete to experience rapid and extreme dorsiflexion-external rotations of the foot. Severe syndesmotic sprains have been noted by clinicians as the most difficult ankle injury to accurately diagnose and treat, require the most recuperation time, and often results in life-long dysfunction. Even more problematic, 40% of patients suffering …
Specimen-Specific Natural, Pathological, And Implanted Knee Mechanics Using Finite Element Modeling, Azhar Akber Ali
Specimen-Specific Natural, Pathological, And Implanted Knee Mechanics Using Finite Element Modeling, Azhar Akber Ali
Electronic Theses and Dissertations
There is an increasing incidence of knee pain and injury among the population, and increasing demand for higher knee function in total knee replacement designs. As a result, clinicians and implant manufacturers are interested in improving patient outcomes, and evaluation of knee mechanics is essential for better diagnosis and repair of knee pathologies. Common knee pathologies include osteoarthritis (degradation of the articulating surfaces), patellofemoral pain, and cruciate ligament injury and/or rupture. The complex behavior of knee motion presents unique challenges in the diagnosis of knee pathology and restoration of healthy knee function. Quantifying knee mechanics is essential for developing successful …