Reverse Mirage Photothermal Beam Deflection: Theory and Experiment

1992 ◽  
pp. 161-164 ◽  
Author(s):  
C. J. Manning ◽  
F. Charbonnier ◽  
J. L. Chao ◽  
R. A. Palmer
Keyword(s):  
Beam Deflection ◽  
Deflection Theory ◽  
Theory And Experiment

Numerical Modeling and Experimental Characterization of the Pyroplasticity in Ceramic Materials during Sintering

2010 ◽  
Vol 62 ◽  
pp. 203-208 ◽  
Author(s):  
Pasquale Bene ◽  
Danilo Bardaro ◽  
Daniela Bello ◽  
Orazio Manni
Keyword(s):  
Ceramic Material ◽  
Ceramic Materials ◽  
Constitutive Law ◽  
Beam Deflection ◽  
Firing Cycle ◽  
Experimental Characterization ◽  
Viscosity Increase ◽  
Ceramic Components ◽  
Deflection Theory ◽  
Sintering Shrinkage

The aim of the work is the study of the pyroplasticity in ceramic materials in order to simulate the deformations of complex ceramic component during sintering. A ceramic material undergoing densification can be treated as a linear viscous material. Generally, the viscosity decreases as the temperature increases, however the densification and the consequent grain growth, result in a viscosity increase. A bending creep test is proposed for measuring the change in viscosity of the ceramic material during densification. Equations, based on beam deflection theory, are derived to determine the viscosity during the whole firing cycle by measuring the deflection in the centre of specimens. In addition, dilatometric analyses are performed to measure the sintering shrinkage and the specimen density, which continuously changes during the sintering process. On the basis of an accurate experimental characterization the parameters of Maxwell viscoelastic constitutive law are derived. A numerical-experimental procedure has been adopted in order to calibrate the numerical model that, finally, has been used to predict the pyroplastic deformations of complex ceramic components.

A New Four-Point Bending System to Supply Cultured Adhensive Cells In Vitro with Cyclic Uniaxial Strain

2007 ◽  
Vol 330-332 ◽  
pp. 1133-1136 ◽  
Author(s):  
Juan Li ◽  
Zhi He Zhao ◽  
Guo Ping Chen ◽  
Hai Tang ◽  
Zhi Hua Li ◽  
...  
Keyword(s):  
Compressive Stress ◽  
Cell Morphology ◽  
Integrate Circuit ◽  
Uniaxial Strain ◽  
Beam Deflection ◽  
Uniaxial Stretching ◽  
Four Point Bending ◽  
Series Of Experiments ◽  
Deflection Theory

We have designed a new four-point bending system by combination of integrate circuit and beam-deflection theory, and conducted a series of experiments concerning cell morphology and proliferation. The system was proved to be able to supply the cultured anchorage-dependent cells with cyclic uniaxial stretching strain and compressive stress easily, precisely and effectively.

Photothermal beam deflection using the reverse mirage geometry: Theory and experiment

1992 ◽  
Vol 71 (5) ◽  
pp. 2433-2440 ◽  
Author(s):  
Christopher J. Manning ◽  
Richard A. Palmer ◽  
James L. Chao ◽  
François Charbonnier
Keyword(s):  
Beam Deflection ◽  
Theory And Experiment

scholarly journals Modeling and Experimentation of the Unidirectional Orthodontic Force of Second Sequential Loop Orthodontic Archwire

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jin-Gang Jiang ◽  
Yi-Hao Chen ◽  
Lei Wang ◽  
Yong-De Zhang ◽  
Yi Liu ◽  
...  
Keyword(s):  
Structural Characteristics ◽  
Beam Deflection ◽  
Forecasting Model ◽  
Cross Sectional ◽  
Orthodontic Force ◽  
Inherent Error ◽  
Sectional Parameters ◽  
Deflection Theory ◽  
The Relationship ◽  
Theoretical Results

The abnormal tooth arrangement is one of the most common clinical features of malocclusion which is mainly caused by the tooth root compression malformation. The second sequential loop is mostly used for the adjusting of the abnormal tooth arrangement. Now, the shape devise of orthodontic archwire depends completely on the doctor’s experience and patients’ feedback, this practice is time-consuming, and the treatment effect is unstable. The orthodontic-force of the different parameters of the second sequence loop, including different cross-sectional parameters, material parameters, and characteristic parameters, was compared and simulated for the abnormal condition of root compression deformity. In this paper, the analysis and experimental study on the unidirectional orthodontic-force were carried out. The different parameters of the second sequential loop are analyzed, and the equivalent beam deflection theory is used to analyze the relationship between orthodontic-force and archwire parameters. Based on the structural analysis of the second sequential loop, the device for measuring orthodontic force has been designed. The orthodontic force with different structural characteristics of archwire was compared and was measured. Finally, the correction factor was developed in the unidirectional orthodontic-force forecasting model to eliminate the influence of inherent error. The average relative error rate of the theoretical results of the unidirectional orthodontic-force forecasting model is between 12.6% and 8.75%, which verifies the accuracy of the prediction model.

Investigation of Tool Deflection of Solid Carbide End Mill in Cutting Process

2012 ◽  
Vol 163 ◽  
pp. 95-99 ◽  
Author(s):  
Qiong Wu ◽  
Yi Du Zhang ◽  
Xiang Sheng Gao ◽  
Lin Fang
Keyword(s):  
Cutting Process ◽  
Beam Deflection ◽  
Work Piece ◽  
Force Model ◽  
Tool Deflection ◽  
End Mill ◽  
Element Analysis ◽  
Solid Carbide ◽  
Deflection Theory ◽  
Milling Force Model

Tool deflection is one of the important influencing factors for surface roughness and surface integrity of work piece in cutting process. The excessive deflection even causes seriously defects of work piece or failures of tool. This paper gives theory analysis and mathematic method to predict the tool deflection by means of the cantilever beam deflection theory. Based on modeling of 3-dimmsion milling force model, the finite element analysis has been performed for calculation of tool deflection. The experiment of tool deflection of solid end mill is performed to compare simulation and theory. Results show the correction and reliability of research method. It lays a foundation for fast calculation of tool deflection and optimization of milling parameters.

Carbon Nanotube-Based Fluid Flow/Shear Sensors

2006 ◽  
Vol 963 ◽  
Author(s):  
Chi-Nung Ni ◽  
Christian P. Deck ◽  
Kenneth S Vecchio ◽  
Prabhakar R Bandaru
Keyword(s):  
Fluid Flow ◽  
Light Transmission ◽  
Flow Direction ◽  
Polarized Light ◽  
Viscoelastic Behavior ◽  
Elastic Beam ◽  
Fluid Flows ◽  
Beam Deflection ◽  
Laser Polarization ◽  
Deflection Theory

ABSTRACTThe response of vertically oriented multi-walled nanotubes (MWNTs) to fluid flows forms a basis for monitoring shear forces at the nanoscale. We report on the modulation of polarized light transmission through a MWNT mat, as a function of the nanotube axis relative to the laser polarization. Nanotubes are deflected under fluid flow, with fluid pressures corresponding to pico-Newton range forces. This deflection is measured as a function of transmitted laser light intensity. While the response of the CNTs to the flows could be modeled through standard elastic beam deflection theory, their recovery, after the force removal, invokes viscoelastic behavior due to CNT disentanglement. The fluid flow direction, as well as its pressure, can also be determined by monitoring the change in transmitted laser polarization.

Phase signal of optical beam deflection from single microparticles: Theory and experiment

1993 ◽  
Vol 73 (5) ◽  
pp. 2264-2271 ◽  
Author(s):  
Masaaki Harada ◽  
Takehiko Kitamori ◽  
Tsuguo Sawada
Keyword(s):  
Optical Beam ◽  
Beam Deflection ◽  
Phase Signal ◽  
Theory And Experiment

High Resolution Specimen Area Imaged Under Negligible Field Aberrations

1970 ◽  
Vol 28 ◽  
pp. 540-541 ◽  
Author(s):  
T. Yanaka ◽  
K. Shirota
Keyword(s):  
High Resolution ◽  
Field Distribution ◽  
Image Space ◽  
Beam Deflection ◽  
Objective Lens ◽  
Resolution Limit ◽  
Leakage Flux ◽  
Specimen Area ◽  
Points Of View ◽  
Aberration Theory

It is significant to note field aberrations (chromatic field aberration, coma, astigmatism and blurring due to curvature of field, defined by Glaser's aberration theory relative to the Blenden Freien System) of the objective lens in connection with the following three points of view; field aberrations increase as the resolution of the axial point improves by increasing the lens excitation (k2) and decreasing the half width value (d) of the axial lens field distribution; when one or all of the imaging lenses have axial imperfections such as beam deflection in image space by the asymmetrical magnetic leakage flux, the apparent axial point has field aberrations which prevent the theoretical resolution limit from being obtained.

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