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Showing 1 to 20 of 232 for “"three-point"”.
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Automation of Orthodontic Wire Tester for Performing Three Point Bending Tests
… treatment. An accurate method to study the threedimensional (3D) force systems and the resulting movements of teeth during orthodontic treatment is needed along with the understanding of the material properties of any orthodontic wire. Until recently, most of the orthodontic biomechanics …
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Damage states in laminated composite three-point bend specimens - an experimental/analytical correlation study
… model problem of a laminated beam subjected to three-point bending. A combination of experimental and theoretical research techniques was used to correlate the experimental results with the analytical stress distributions. The analytical solution procedure was based on the stress formulation …
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Preliminary Investigation of the Mechanical Properties of Costal Cartilage and Costochondral Junction in Three-Point Bending
… costochondral junction when loaded to failure in three-point bending. Thirty (n=30) total samples were harvested from nineteen (n=19) donors from ages 21 to 98 years (9 Male, 10 Female). 3rd, 4th, 5th, and 6th ribs and costal cartilage were harvested and isolated into CC only and Rib + CC groups …
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Comparison of smallest eigenvalues and extremal points for third and fourth order three point boundary value problems.
… variation of the fourth order problem. Extremal points via Krein-Rutman theory are then found. Analogous results are then obtained for the eigenvalue problems u‴ + λ₁p(x)u = 0 and u‴ + λ₂q(x)u = 0, with each satisfying u(0) = u′(r) = u″(1) = 0, 0 < 1/2 < r < 1.
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Ultimate Strength Prediction in Fiberglass/Epoxy Beams Subjected to Three-Point Bending Using Acoustic Emission and Neural Networks
… strengths in composite beams subjected to 3-point bending using a neural network analysis of acoustic emission (AE) amplitude distribution data. Fifteen unidirectional fiberglass/epoxy beams were loaded to failure in a 3-point bend test fixture in an MTS load frame. Acoustic emission data …
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Three-Point Correlator and Pion Form Factor in Quantum Chromodynamics: Methods of Calculation for Two-Loop Spectral Density
… calculation of spectral density for the 3-point correlation function of an electromagnetic current and two axial currents which are the basis of the pion form factor analysis within the framework of QCD sum rules and local quark-hadron duality approach. The nature of various types of …
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Positive Solutions, Existence Of Smallest Eigenvalues, And Comparison Of Smallest Eigenvalues Of A Fourth Order Three Point Boundary Value Problem
… is then applied to characterize extremal points of the differential equation $u^{(4)} + q(t)u = 0$ satisfying boundary conditions $u(0) = u'(p) = u''(b) = u'''(b)= 0$ where $1-\frac{ </p>
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Investigation of ultrastructural and mechanical properties of rat cortical bone using micro-CT, three-point bending testing, and the reference point indentation technique
… bone as a function of age were assessed with three-point bending testing. Additionally, a novel microindentation technique, termed reference point indentation (RPI),that is capable of in vivo testing was used to assess the mechanical properties of rat bone. These results were compared to …
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Semidefinite programming bounds for codes in complex projective space
We establish three-point bounds for codes in complex projective space, where previously only two-point linear programming bounds were known. We discuss how these bounds can be computed numerically using semidefinite programming, and provide a framework that allows for proofs of universal optimality …
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Movement Response Times Associated with Blocking in Football from the Three- and Four-Point Center Stances
… movement times resulting from assuming the three-point and the four-point center stances, for junior high, senior high, junior college and college football players without previous experience at the center position; and (2) to determine the significance of difference between means of right, …
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Phase Diagram of a Driven Lattice Gas of Two Species with Attractive Interactions
… Monte Carlo investigation of the phase diagram. Three phases are found, with a homogenous phase at high temperatures and two distinct ordered phases at lower temperatures. Which ordered phase is observed depends on the parameter f, which controls the ratio of the two types of particles. At small …
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Comparison of Shear Modulus Test Methods
This research compared the results of three tests: ASTM D 198 torsion, ASTM D 198 three-point bending and the five-point bending test (FPBT) using machine-stress-rated (MSR) lumber and laminated veneer lumber (LVL) to determine if the shear properties evaluated by the different test methods were …
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Study of Durability of Epoxy Bonded Joints in Aqueous Environments
… of the bonded joints were evaluated using a three-point flexure test. The neat epoxy samples were also aged under the same conditions, and three-point flexure test and dynamic mechanical analysis (DMA) were performed to evaluate their mechanical properties. The moisture uptake of the neat …
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The Effect of Austenitization Temperature on the Microstructure, Bend Properties, and Hardness of a Chrome-Bearing White Cast Iron
… 14 chromium and 3.2 carbon by weight percent. Three-point bend test specimens were cut from cast plates. These specimens were austenitized, air cooled, then tempered prior to three-point bend and hardness testing. The microstructure of the specimens was evaluated using optical microscopy, SEM, …
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Meson Photo-Couplings From Lattice Quantum Chromodynamics
<p>We explore the calculation of three-point functions featuring a vector current insertion in lattice Quantum Chromodynamics. These three-point functions, in general, contain information about many radiative transition matrix elements simultaneously. We develop and implement the technology …
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A coupled theory for diffusion of hydrogen and large elastic-plastic deformations of metals
… of plane-strain tensile deformation and three-point bending of U-Notched specimens. Our simulations on the effects of hydrogen on three-point bending of U-notched specimens are shown to be in good qualitative agreement with published experiments.
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Novel techniques for fracture monitoring in crystalline rock
… and under two different loading conditions, three-point and four-point bending. Digital Image Correlation (DIC) was used to identify and calculate the dimensions of the fracture process zone. The study of fracture and fracture processes in granitic specimens through DIC is challenging due to …
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High-Energy Aspects of Inflationary Cosmology
… constraint on the size and the sign of the four-point function in terms of the amplitude of the three-point function. We then study the imprints of extra massive particles of arbitrary spin on the three-point function. We classify the couplings of these particles to inflationary scalar and tensor …
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SUCCESSFUL SHOT LOCATIONS AND SHOT TYPES USED IN NCAA MEN’S DIVISION I BASKETBALL
… analyses were completed in RStudio and three binomial logistic regression analyses were performed to evaluate factors that influence shot success; one for all two and three point shot attempts, one for only two point attempts, and one for only three point attempts. Results indicated that …
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Effects of deformation modes on the susceptibility of delayed fracture of advanced high strength steels
… charging, and were then transferred to a three-point test setup to evaluate delayed fracture. A simple three-point bend test was used to impose a tensile stress on one of the surfaces. The samples were held in the test set up until fracture occurred in order to assess their susceptibility …
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