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RISLow-Frequency Regenerative Vibration and the Formation of Lobed Holes in Drilling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Large-amplitude vibrations in drilling often occur at frequencies near multiples of the rotation frequency, even when these are much lower than the system’s first natural frequency. These vibrations ...
Constrained Tibial Vibration in Mice: A Method for Studying the Effects of Vibrational Loading of Bone
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Vibrational loading can stimulate the formation of new trabecular bone or maintain bone mass. Studies investigating vibrational loading have often used whole-body vibration (WBV) as their loading ...
Theory of Torsional Chatter in Twist Drills: Model, Stability Analysis and Composition to Test
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The mechanism of torsional chatter in drilling differs qualitatively and quantitatively from other types of chatter. In this paper we show that torsional chatter can be explained by the ...
Nonlinear Dynamics of High-Speed Milling—Analyses, Numerics, and Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High-speed milling is often modeled as a kind of highly interrupted machining, when the ratio of time spent cutting to not cutting can be considered as a small parameter. In these cases, the ...
Axons Pull on the Brain, But Tension Does Not Drive Cortical Folding
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: During human brain development, the cerebral cortex undergoes substantial folding, leading to its characteristic highly convoluted form. Folding is necessary to accommodate the expansion of the ...
A New Method for Measuring Deformation of Folding Surfaces During Morphogenesis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: During morphogenesis, epithelia (cell sheets) undergo complex deformations as they stretch, bend, and twist to form the embryo. Often these changes in shape create multivalued surfaces that can ...
Measurement of the Dynamic Shear Modulus of Mouse Brain Tissue In Vivo by Magnetic Resonance Elastography
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this study, the magnetic resonance (MR) elastography technique was used to estimate the dynamic shear modulus of mouse brain tissue in vivo. The technique allows visualization and measurement ...
Analysis of Tool Oscillation and Hole Roundness Error in a Quasi-Static Model of Reaming
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A quasi-static model of reaming is developed to explain oscillation of the tool during cutting and the resulting roundness errors in reamed holes. A tool with N evenly-spaced teeth often ...
A New Method to Measure Cortical Growth in the Developing Brain
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Folding of the cerebral cortex is a critical phase of brain development in higher mammals but the biomechanics of folding remain incompletely understood. During folding, the growth of the ...
Opening Angles and Material Properties of the Early Embryonic Chick Brain
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Mechanical forces play an important role during brain development. In the early embryo, the anterior end of the neural tube enlarges and differentiates into the major brain subdivisions, including ...