conversion, 137-140 Extensometers, 188-189 multiplexing, 137,148-149 processing, 150-151 quantization, 139-140 Dead band, 108 Feather, 9-10 flatness, 578-587, 776-779 Filter, 137-138, 149-150 floating, 275-277 cut-off frequency, 149-150 Decibels, 223-224 pass band, 149-150 Discrimination, 108 stop band, 149-150 Distribution, normal, 77-78 Finite element analysis, 415-416, 461-473, Dog bone 479-480, 529-534 rolling, 441-442 Fish tail, 15-16,340-346, 406,430 shape, 12-13, 328-333 Flatness Doppler sensors, 117-119,134-135 error, 93 Drift, 108 performance, 93 Drives, 214-215 Flowmeters, 117 Frequency E break, 241 crossover, 241 Edge Friction, 218 cross-sectional static, 109 profile, 315-316 Fuzzy inference method, 798-799 shape, 13-14,347-349 drop, 9-10, 638-640, 736, 779,782-783 overlap, 413 thinning ratio, 610-612 Gages Edgers, 356-362,429-436 strain, 127 Edging thickness, 175-180 combined, 179-180 by rolling, 315-350 capability, 358 isotope, 177-180 efficiency, 333-334, 337-338, 387-389 optical, 176-177 practice, 360-367 profile, 749-750 rolls, 334-340,349, 358, 360, 401-402, 410 X-ray, 178-180, 747-748 Errors Gauge analysis of, 112 change, flying, 169-171 band, 109 control data transmission, 151-152 adaptive threading, 215-216 compensation, 169,218-219 illegitimate, 151-154 legitimate, 151 deviation, 199-200 position, 225, 239-241 differential, 197-198 propagation of, 112-113 dynamic, 212 random, 112 feedback, 197,199,212 feedforward, 199-200,208, 212, 215-217, signal conditioning, 151 278-281 recovery, 151-152 flow-stress feedforward, 208-209 high/low frequency, 212 sampling, 154-155 sensing, 151 in-gap, 278 mass flow, 211-212 systematic, 112

1993 ◽  
pp. 824-830
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Flow Stress ◽  
Fuzzy Inference ◽  
Stop Band ◽  
Low Frequency ◽  
Pass Band ◽  
Element Analysis ◽  
Cross Sectional ◽  
Dog Bone

Mechanical Design, Additive Manufacturing, and Performance of Equal Volume Metamaterials

2021 ◽  
Author(s):  
Richárd Horváth ◽  
Vendel Barth ◽  
Viktor Gonda ◽  
Mihály Réger ◽  
Imre Felde
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Absorption ◽  
Mechanical Design ◽  
Area Under The Curve ◽  
Cell Number ◽  
Element Analysis ◽  
Cross Sectional ◽  
Unit Cells ◽  
And Performance

Abstract In this paper, we study the energy absorption of metamaterials composed of unit cells whose special geometry makes the cross-sectional area and the volume of the bodies generated from them constant (for the same enclosing box dimensions). After a parametric description of such special geometries, we analyzed by finite element analysis the deformation of the metamaterials we have designed during compression. We 3D printed the designed metamaterials from plastic to subject them to real compression. The results of the finite element analysis were compared with the real compaction results. Then, for each test specimen, we plotted its compaction curve. By fitting a polynomial to the compaction curves and integrating it (area under the curve), the energy absorption of the samples can be obtained. As a result of these investigations, we drew a conclusion about the relationship between energy absorption and cell number.

Finite Element Analysis for the Tube Sinking Process of the Micro Ti-0.2Pd Tube

2013 ◽  
Vol 465-466 ◽  
pp. 693-698 ◽  
Author(s):  
Seok Kwan Hong ◽  
Jeong Jin Kang ◽  
Jong Deok Kim ◽  
Heung Kyu Kim ◽  
Sang Yong Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Flow Stress ◽  
Internal Surface ◽  
External Diameter ◽  
Stress Equation ◽  
Element Analysis ◽  
Simulation Error ◽  
Simulation Results ◽  
Flow Stress Equation

In this study, the tube sinking process for manufacturing the micro Ti-0.2Pd tube (2.4 mm external diameter, 0.4 mm thickness) was simulated by finite element analysis. The external diameter of the initial tube was 5.0 mm. In order to simulate the tube sinking process, the flow stress equation was deducted from the result of the tensile test and friction coefficient was indirectly obtained through the parameter studies. The simulation results showed the simulation error according to the change of diameter predicted to be less than 2%. The defect of the internal surface by stress was found through the experiment result.

Prediction of Microstructure During High Temperature Forming of Ti-6Al-4V Alloy

2004 ◽  
Vol 449-452 ◽  
pp. 189-192 ◽  
Author(s):  
You Hwan Lee ◽  
T.J. Shin ◽  
Jong Taek Yeom ◽  
Nho Kwang Park ◽  
S.S. Hong ◽  
...  
Keyword(s):  
Activation Energy ◽  
Finite Element Analysis ◽  
Finite Element ◽  
High Temperature ◽  
Flow Stress ◽  
Rate Sensitivity ◽  
Strain Rates ◽  
Element Analysis ◽  
Strain Data ◽  
Final Microstructure

Prediction of final microstructures after high temperature forming of Ti-6Al-4V alloy was´attempted in this study. Using two typical microstructures, i.e., equiaxed and Widmanstätten microstructures, compression test was carried out up to the strain level of 0.6 at various temperatures (700 ~ 1100°C) and strain rates (10-4 ~ 102/s). From the flow stress-strain data, parameters such as strain rate sensitivity (m) and activation energy (Q) were calculated and used to establish constitutive equations for both microstructures. Then, finite element analysis was performed to predict the final microstructure of the deformed body, which was well accorded with the experimental results.

scholarly journals Buckling of Arteries With Noncircular Cross Sections: Theory and Finite Element Simulations

2021 ◽  
Vol 12 ◽  
Author(s):  
Yasamin Seddighi ◽  
Hai-Chao Han
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Blood Vessel ◽  
Cross Sections ◽  
Mechanical Stability ◽  
Theoretical Models ◽  
Homogeneous Material ◽  
Element Analysis ◽  
Cross Sectional ◽  
Buckling Behavior

The stability of blood vessels is essential for maintaining the normal arterial function, and loss of stability may result in blood vessel tortuosity. The previous theoretical models of artery buckling were developed for circular vessel models, but arteries often demonstrate geometric variations such as elliptic and eccentric cross-sections. The objective of this study was to establish the theoretical foundation for noncircular blood vessel bent (i.e., lateral) buckling and simulate the buckling behavior of arteries with elliptic and eccentric cross-sections using finite element analysis. A generalized buckling equation for noncircular vessels was derived and finite element analysis was conducted to simulate the artery buckling behavior under lumen pressure and axial tension. The arterial wall was modeled as a thick-walled cylinder with hyper-elastic anisotropic and homogeneous material. The results demonstrated that oval or eccentric cross-section increases the critical buckling pressure of arteries and having both ovalness and eccentricity would further enhance the effect. We conclude that variations of the cross-sectional shape affect the critical pressure of arteries. These results improve the understanding of the mechanical stability of arteries.

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