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Full-Text Articles in Mechanical Engineering
Effect Of Topology On The Adhesive Forces Between Electrospun Polymer Fibers Using A T-Peel Test, Florencia Ballarin, Todd Blackledge, Nicole Capitos Davis, Partrica Frontini, Gustavo Abraham, Shing-Chung Wong
Effect Of Topology On The Adhesive Forces Between Electrospun Polymer Fibers Using A T-Peel Test, Florencia Ballarin, Todd Blackledge, Nicole Capitos Davis, Partrica Frontini, Gustavo Abraham, Shing-Chung Wong
Todd A. Blackledge
Electrospinning provides an effective methodology to obtain high aspect ratio polymer fibers for biomimetic applications. In this article, we evaluate the effect of topology on adhesion between aligned fibers. Polycaprolactone is electrospun using two different setups: (i) a tip collector and (ii) a flat collector. The tip collector enables the fibers to self-align. When a fiber reaches the tip collector, the next fiber is repelled by the charge they carry, forcing the fibers to deposit in a parallel arrangement. The flat collector allows the fibers to deposit at random. The adhesion between the fiber mats is measured using a T-peel …
Compatibility Of Medical-Grade Polymers With Dense Co2, A. Jiménez, G. Thompson, Michael Matthews, T. Davis, K. Crocker, Jed Lyons, A. Trapotsis
Compatibility Of Medical-Grade Polymers With Dense Co2, A. Jiménez, G. Thompson, Michael Matthews, T. Davis, K. Crocker, Jed Lyons, A. Trapotsis
Michael A. Matthews
No abstract provided.
Molecular Modeling Of Thermosetting Polymers: Effects Of Degree Of Curing And Chain Length On Thermo-Mechanical Properties, Natalia Shenogina, Mesfin Tsige, Sharmila Mukhopadhyay, Soumya Patnaik
Molecular Modeling Of Thermosetting Polymers: Effects Of Degree Of Curing And Chain Length On Thermo-Mechanical Properties, Natalia Shenogina, Mesfin Tsige, Sharmila Mukhopadhyay, Soumya Patnaik
Mesfin Tsige
No abstract provided.
Systematic Approach For Modeling Methanol Mass Transport On The Anode Side Of Direct Methanol Fuel Cells, Mohammad Biswas
Systematic Approach For Modeling Methanol Mass Transport On The Anode Side Of Direct Methanol Fuel Cells, Mohammad Biswas
Mohammad Biswas
A Weighted Least-Squares Method For Inverse Dynamic Analysis, Antonie Van Den Bogert, Anne Su
A Weighted Least-Squares Method For Inverse Dynamic Analysis, Antonie Van Den Bogert, Anne Su
Anne Su Ph.D.
Internal forces in the human body can be estimated from measured movements and external forces using inverse dynamic analysis. Here we present a general method of analysis which makes optimal use of all available data, and allows the use of inverse dynamic analysis in cases where external force data is incomplete. The method was evaluated for the analysis of running on a partially instrumented treadmill. It was found that results correlate well with those of a conventional analysis where all external forces are known.
Horses Damp The Spring In Their Step, Alan Wilson, M. Mcguigan, Anne Su, Antonie Van Den Bogert
Horses Damp The Spring In Their Step, Alan Wilson, M. Mcguigan, Anne Su, Antonie Van Den Bogert
Anne Su Ph.D.
The muscular work of galloping in horses is halved by storing and returning elastic strain energy in spring-like muscle–tendon units1, 2.These make the legs act like a child's pogo stick that is tuned to stretch and recoil at 2.5 strides per second. This mechanism is optimized by unique musculoskeletal adaptations: the digital flexor muscles have extremely short fibres and significant passive properties, whereas the tendons are very long and span several joints3, 4. Length change occurs by a stretching of the spring-like digital flexor tendons rather than through energetically expensive length changes in the muscle5. Despite being apparently redundant for …
Foot And Ankle Forces During An Automobile Collision: The Influence Of Muscles, Elizabeth Hardin, Anne Su, Antonie Van Den Bogert
Foot And Ankle Forces During An Automobile Collision: The Influence Of Muscles, Elizabeth Hardin, Anne Su, Antonie Van Den Bogert
Anne Su Ph.D.
Muscles have a potentially important effect on lower extremity injuries during an automobile collision. Computational modeling can be a powerful tool to predict these effects and develop protective interventions. Our purpose was to determine how muscles influence peak foot and ankle forces during an automobile collision. A 2-D bilateral musculoskeletal model was constructed with seven segments. Six muscle groups were included in the right lower extremity, each represented by a Hill muscle model. Vehicle deceleration data were applied as input and the resulting movements were simulated. Three models were evaluated: no muscles (NM), minimal muscle activation at a brake pedal …
In Situ Stress Measurement During Aluminum Anodizing Using Phase-Shifting Curvature Interferometry, Ömer Çapraz, Kurt Hebert, Pranav Shrotriya
In Situ Stress Measurement During Aluminum Anodizing Using Phase-Shifting Curvature Interferometry, Ömer Çapraz, Kurt Hebert, Pranav Shrotriya
Ömer Özgür Çapraz
Stress measurements yield insight into technologically relevant deformation and failure mechanisms in electrodeposition, battery reactions, corrosion and anodic oxidation. Aluminum anodizing experiments were performed to demonstrate the effectiveness of phase-shifting curvature interferometry as a new technique for high-resolution in situ stress measurement. This method uses interferometry to monitor surface curvature changes, from which stress evolution is inferred. Phase-shifting of the reflected beams enhanced measurement sensitivity, and the separation of the optical path from the electrochemical cell in the present system provided increased stability. Curvature changes as small as 10−3 km−1 were detected, at least comparable to the resolution of state-of-the-art …