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Fabrication of elastomer arterial models with specified compliance
2000
Journal of applied physiology
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-A simple way of making elastic tubes using a mechanical lathe for precise control of the wall thickness is proposed in this study. ...
These tubes are particularly useful for modeling properties of large arteries. ...
doi:10.1152/jappl.2000.88.4.1291
pmid:10749821
fatcat:mpo7yi3x6nejxcacj5syxwhhga
Influence of ovalisation on the plastic collapse of thick cylindrical tubes under uniform bending
2018
International Journal of Pressure Vessels and Piping
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Simulations are performed using two-and three-dimensional finite element models with a simple ideal elastic-plastic material law that excludes the influence of strain hardening. ...
an important parameter controlling geometric nonlinearity. ...
Fig. 3 . 3 Comparison of nonlinear elastic moment-curvature equilibrium paths obtained from the 2D and 3D GNA models and the predictions in Karamanos [11] for the elastic buckling of 'long' cylinders ...
doi:10.1016/j.ijpvp.2018.05.004
fatcat:qkbje6g75fd4jnfbhrcaagd3fy
Fatigue Life Prediction of Steam Generator Tubes by Tube Specimens with Circular Holes
2019
Metals
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In this study, a thin-walled Inconel 690 tube with circular hole is designed to deduce the fatigue life of smooth tube based on the notch fatigue life prediction technology. ...
Compared with the average fatigue life of nickel-based alloy, the new predicted equivalent fatigue life of heat Inconel 690 transfer tube with a hole is higher. ...
This difference may be attributed to two reasons: fatigue life prediction model itself and material fatigue life curve. (1) When the prediction method is concerned, the fatigue life prediction model based ...
doi:10.3390/met9030322
fatcat:ts52rcr4zfe2pbpyuro2nwfz4u
Modelling of Wrinkling in NC Bending of Thin-walled Tubes with Large Diameters under Multi-die Constraints Using Hybrid Method
2014
Procedia Engineering
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Second, by assigning the geometrical imperfection into the perfect mesh of the tube, a series of hybrid explicit FE models for numerical control rotary-draw-bending is established. ...
Numerical control thin-walled tube bending is an advanced technology for manufacturing precision bent tube parts in aerospace, aviation and automobiles, etc. ...
Fig. 2 . 2 The 3D elastic-plastic FEM model for rotary-draw-bending of thin-walled tube: (a) assigning three different imperfections into the 3D elastic-plastic FE model. ...
doi:10.1016/j.proeng.2014.10.304
fatcat:ao6ycj3hknbnpouzf7i4vuc7v4
Analysis of refrigerant flow and deformation for a flexible short-tube using a finite element model
2004
International journal of refrigeration
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The finite element model was developed using a commercially available finite element package. Short-tubes with moduli of elasticity ranging from 5513 to 9889 kPa were studied. ...
A finite element model was used to simulate single-phase flow of R-22 through flexible short-tubes. ...
The purpose of this study was to develop a finite element model that could be used to (1) predict the deformation in a flexible short-tube for different moduli of elasticity and system conditions, and ...
doi:10.1016/j.ijrefrig.2003.04.001
fatcat:yslldealdvhvpjfd2bolgab6k4
Forming Characteristics of Al-alloy Large-diameter Thin-walled Tubes in NC-bending Under Axial Compressive Loads
2010
Chinese Journal of Aeronautics
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By combining the FE model with a wrinkling energy prediction model, an in-depth study is conducted on the forming characteristics of large-diameter AATTs with small bending radii and it can be concluded ...
Thus, this article establishes a three-dimensional (3D) elastic-plastic explicit finite element (FE) model for the bending under ACL and has its reliability verified. ...
model for the bending and the energy wrinkling prediction model, which has shown the advantages of this combination in the tube wrinkling prediction. ...
doi:10.1016/s1000-9361(09)60242-9
fatcat:hrkkhomafzhlrjmodhd4e64ooq
Balance between Apical Membrane Growth and Luminal Matrix Resistance Determines Epithelial Tubule Shape
2014
Cell Reports
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We developed a physical model in which stability of a tube is determined by aECM elasticity, apical-membrane growth, and their association. ...
Test and Predictions of the Model One of the assumptions behind the model is that apical membrane and core matrix can vary independently and that their rela-tive values determine the final tube shape. ...
doi:10.1016/j.celrep.2014.03.066
pmid:24794438
fatcat:lm52w4njqbfxnnw74teme3f57y
Predicting the Effect of Nano-Structural Parameters on the Elastic Properties of Carbon Nanotube-Polymeric based Composites
2017
International Journal of Performability Engineering
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toward the overall elastic modulus is modeled. ...
Moreover, a micromechanical approach for modeling short fiber composites was developed to account for the structure of the multi-walled carbon nanotube reinforcement and predict the elastic modulus of ...
the overall elastic modulus is modeled. ...
doi:10.23940/ijpe.17.01.p6.7386
fatcat:dkcxl4xhhvdlxjga25roh7hvpu
A force-level theory of the rheology of entangled rod and chain polymer liquids. I. Tube deformation, microscopic yielding, and the nonlinear elastic limit
2016
Journal of Chemical Physics
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2016 pre-print arXiv:1604.03971v1 fatcat:24wsakjxjfhrbblnzlxy6s4zyq
For all three systems, a finite maximum transverse entanglement force localizing the polymers in effective tubes is predicted. ...
For needles and PP-level chains, a Gaussian analysis of transverse polymer dynamical fluctuations predicts that deformation-induced orientation leads to tube dilation. ...
harmonic tube diameter question based on the simplest model where κ = 1; recall that the predicted tube diameter changes only by ∼ 20% as κ = 1 → 2.5 [28] . ...
doi:10.1063/1.4968516
pmid:28799380
fatcat:sccgzgmvtbeirdcy37bm6f5voi
Fluidic Fabric Muscle Sheets for Wearable and Soft Robotics
[article]
2019
arXiv
pre-print
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We present a simple mathematical model that proves effective for predicting their performance. ...
They are composite fabric structures that integrate fluidic transmissions based on arrays of elastic tubes. ...
We compared the results with predictions of the analytical model (Eq. 8). To compute these predictions, we used the geometric dimensions and measured the Young's modulus of the elastic tube. ...
arXiv:1903.08253v1
fatcat:z5kwy5crmbgdhbvnv7zmvfxbuu
Refrigerant Flow Through Flexible Short-Tube Orifices
2002
HVAC & R RESEARCH
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However, the flow control with the flexible short-tube orifice was not as good as with a thermal expansion valve. ...
One short tube had a modulus of elasticity of 7063 kPa and the other a value of 9860 kPa. Both short tubes had identical lengths (14.5 mm), entrance diameters (2.06 mm), and exit diameters (2.46 mm). ...
The mass flow rates for the rigid short tube were predicted values using a semiempirical model developed in an earlier study (Kim 1993) . ...
doi:10.1080/10789669.2002.10391435
fatcat:r6dzt4fptrfipcbpgeranuumae
Springback Analysis for Warm Bending of Titanium Tube Based on Coupled Thermal-Mechanical Simulation
2021
Materials
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verified, for predicting the springback behavior in warm bending. ...
In this paper, using warm bending of thin-walled commercial pure titanium tube as a case, a coupled thermal-mechanical finite element model of through-process heating-bending-unloading is constructed and ...
To improve the springback simulation accuracy, the modulus degradation effect can be considered by several nonlinear elastic unloading models in springback simulation for improved prediction accuracy ...
doi:10.3390/ma14175044
pmid:34501133
fatcat:xvjwi5qi4bhzffaehwnlha6jja
Modelling the mechanical effects of tracheal tubes in normal subjects
1995
European Respiratory Journal
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On the basis of experimental data from the literature and on a previously reported mathematical model of the inspirogram, we wished to study predictions of pressures, volume, flow and work of breathing ...
Zin Modelling the mechanical effects of tracheal tubes in normal subjects. P.R.M. Rocco, W.A. Zin. ERS Journals Ltd 1995. ...
Under these circumstances, the model predictions were based on: P°ao(t) = E'rs·V(t) + (R'rs + K 1 )·V(t) + K 2 V 2 (t) (3) In this model, it has been assumed that tracheal tubes do not affect the intensity ...
doi:10.1183/09031936.95.08010121
pmid:7744178
fatcat:bz5rgv7pyvazrm63e3pyx4vy4m
Springback law of thin-walled 6061-T4 Al-alloy tube upon bending
2012
Transactions of Nonferrous Metals Society of China
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radius, the friction between tube and pressure die, the clearance between tube and wiper die, the clearance between tube and pressure die, the coefficient of boost velocity, the friction between tube ...
and mandrel, the number of mandrel balls. 3) The effect rules of significant parameters on springback of 6061-T4 Al-alloy tube are similar to those of stainless steel and Ti-alloy tubes. ...
LI et al [7] developed an analytical model for springback control in tube bending. ...
doi:10.1016/s1003-6326(12)61731-2
fatcat:ohpkiyd6b5bgfay3qodouw6zau
Axial Load-carrying Capacity of Steel Tubed Concrete Short Columns Confined with Advanced FRP Composites
2020
Periodica polytechnica. Civil engineering
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This research focuses on the structural behavior of steel tube FRP jacket–confined concrete (STFC) columns under axial concentric loading and proposes a new empirical equation for predicting the axial ...
A close agreement was observed between the predictions of proposed finite element model and proposed capacity equation. ...
critical stress in the elastic region of steel tube. ...
doi:10.3311/ppci.15199
fatcat:wgsp4r254zh4jev3gxyrpfm7jq
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