Development and Validation of Numerical Model for Predicting Electromagnetic Expansion of Composite Rings

2013 ◽  
Vol 198 ◽  
pp. 627-632
Author(s):  
Jacek Janiszewski ◽  
Robert Panowicz
Keyword(s):  
Numerical Model ◽  
Ring Expansion ◽  
Constitutive Relationship ◽  
Numerical Code ◽  
Expansion Process ◽  
Ring Specimen ◽  
Good Convergence ◽  
Composite Ring ◽  
High Strain Rate Deformation ◽  
Development And Validation

In the present work, the description of a numerical model for predicting the electromagnetic composite ring expansion process and validation of a developed numerical code is presented. The strength response of rings materials under high strain rate deformation was described by using the well-known JohnsonCook constitutive relationship. Numerical considerations and experimental validation were performed for a composite ring consisted of a copper drive ring and X37CrMoV51 steel ring specimen. The analyses of the obtained results allow to find out that good convergence of theoretical and experimental data was achieved.

ChemInform Abstract: New Route to Pyrido[1,2-b]pyridazinium Inner Salts. Evidence of a 1,3-Dipolar Cycloaddition-Ring Expansion Process.

ChemInform ◽  
2010 ◽  
Vol 30 (17) ◽  
pp. no-no
Author(s):  
Jesus Valenciano ◽  
Ana M. Cuadro ◽  
Juan J. Vaquero ◽  
Julio Alvarez-Builla
Keyword(s):  
Ring Expansion ◽  
Dipolar Cycloaddition ◽  
Expansion Process

Investigations on thermodynamic processes of a novel pneumatic drive asymmetric Gifford-McMahon cycle cryorefrigerator

2021 ◽  
pp. 1-21
Author(s):  
Debashis Panda ◽  
Suraj Kumar Behera ◽  
Ashok Kumar Satapathy ◽  
Sunil K. Sarangi
Keyword(s):  
Numerical Model ◽  
Performance Parameters ◽  
Pneumatic Drive ◽  
Governing Equations ◽  
Expansion Process ◽  
Intake Process ◽  
The Impact ◽  
First Time ◽  
Thermodynamic Processes ◽  
Dead Centre

Abstract In this paper, a numerical and experimental investigation is conducted on a novel pneumatic-drive asymmetric Gifford-McMahon cycle cryorefrigerator for the first time. In the pneumatic-drive asymmetric Gifford-McMahon cycle cryorefrigerator, the duration of the assistance space exhaust process is kept higher than that of the assistance space intake process. Therefore, the displacer moves faster at the lower dead centre and slower at the upper dead centre inside the expander cylinder, which makes the duration of expansion process longer. The numerical model solves the governing equations of the refrigerant and dynamics of free-floating displacer iteratively to illustrate the refrigeration mechanisms. Additionally, the model computes the performance parameters of the cryorefrigerator, like refrigerating capacity, and specific refrigerating capacity. By adopting the numerical model, the impact of the loitering time on the thermodynamic processes is elaborated. It is perceived that, both refrigerating capacity and specific refrigerating capacity reduces with an increase in the loitering time. The experimental cooling characteristics are studied for different values of discharge to suction pressure ratios of helium compressor.

scholarly journals Mode-I Fracture Behavior of CFRPs: Numerical Model of the Experimental Results

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 513 ◽  
Author(s):  
Claudia Barile ◽  
Caterina Casavola ◽  
Benedetto Gambino ◽  
Alessandro Mellone ◽  
Marco Spagnolo
Keyword(s):  
Numerical Model ◽  
Composite Laminates ◽  
High Performance ◽  
Mechanical Response ◽  
Numerical Models ◽  
Constitutive Relationship ◽  
Mode I ◽  
Experimental Calibration ◽  
Reinforced Plastics ◽  
High Performance Composite

In the last decades, the increasing use of laminate materials, such as carbon fibre reinforced plastics, in several engineering applications has pushed researchers to deeply investigate their mechanical behavior, especially in consideration of the delamination process, which could affect their performance. The need for improving the capability of the current instruments in predicting some collapse or strength reduction due to hidden damages leads to the necessity to combine numerical models with experimental campaigns. The validation of the numerical models could give useful information about the mechanical response of the materials, providing predictive data about their lifetime. The purpose of the delamination tests is to collect reliable results by monitoring the delamination growth of the simulated in situ cracking and use them to validate the numerical models. In this work, an experimental campaign was carried out on high performance composite laminates with respect to the delamination mode I; subsequently, a numerical model representative of the experimental setup was built. The ANSYS Workbench Suite was used to simulate the delamination phenomena and modeFRONTIER was applied for the numerical/experimental calibration of the constitutive relationship on the basis of the delamination process, whose mechanism was implemented by means of the cohesive zone material (CZM) model.

Development and validation of a free-piston engine generator numerical model

2015 ◽  
Vol 91 ◽  
pp. 333-341 ◽  
Author(s):  
Boru Jia ◽  
Zhengxing Zuo ◽  
Guohong Tian ◽  
Huihua Feng ◽  
A.P. Roskilly
Keyword(s):  
Numerical Model ◽  
Piston Engine ◽  
Free Piston ◽  
Free Piston Engine ◽  
Development And Validation

Development and validation of a numerical model for predicting forklift truck tip-over

2009 ◽  
Vol 47 (7) ◽  
pp. 771-804 ◽  
Author(s):  
Jérôme Rebelle ◽  
Pierre Mistrot ◽  
Richard Poirot
Keyword(s):  
Numerical Model ◽  
Forklift Truck ◽  
Development And Validation

Evolution of droplets in subsea oil and gas blowouts: Development and validation of the numerical model VDROP-J

2014 ◽  
Vol 83 (1) ◽  
pp. 58-69 ◽  
Author(s):  
Lin Zhao ◽  
Michel C. Boufadel ◽  
Scott A. Socolofsky ◽  
Eric Adams ◽  
Thomas King ◽  
...  
Keyword(s):  
Numerical Model ◽  
Oil And Gas ◽  
Development And Validation

scholarly journals Suitability of the electromagnetic ring expansion test to characterize materials under high strain rate deformation

2016 ◽  
Vol 80 ◽  
pp. 15002
Author(s):  
Kang Yang ◽  
Geoffrey Taber ◽  
Thaneshan Sapanathan ◽  
Anupam Vivek ◽  
Glenn S Daehn ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Ring Expansion ◽  
Expansion Test ◽  
High Strain Rate Deformation

Numerical Computations of MHD Flow on Hypersonic and Re-Entry Vehicles

2016 ◽  
Author(s):  
Filipe Dias ◽  
José Páscoa ◽  
Carlos Xisto
Keyword(s):  
Numerical Model ◽  
Mhd Flow ◽  
Magnetic Reynolds Number ◽  
Numerical Code ◽  
Test Case ◽  
Flow Equations ◽  
Good Comparison ◽  
Spatial Discretisation ◽  
Radio Blackout ◽  
Mission Operation

In hypersonic flight of reentry vehicles the radio blackout is a typical problem, in particular because it arises during a critical mission operation point. To mitigate this radio blackout the magnetic window concept is proposed. In this work a numerical model is presented to accurately simulate the effect of a magnetic field interacting with ionized plasma surrounding the vehicle. The numerical model is based on the MHD flow equations. Initially, the code is validated for pure hypersonic gas dynamics. Diverse high resolution spatial discretisation schemes, within a Finite Volume framework, are analyzed for robustness. Afterwards, the numerical code is further validated for MHD flows using the well-known Hartmann case. A very good comparison between numerical and analytical results is verified. This allows a proper validation of the method in terms of Lorentz force, in particular under low-magnetic Reynolds number conditions. A very tough test-case is finally computed, being typical of a reentry capsule geometry. The accuracy of the model is then verified for different applied magnetic fields.

Development and Validation of a Numerical Model for Suspended-Ceiling Systems with Acoustic Tiles

2016 ◽  
Vol 22 (3) ◽  
pp. 04016008 ◽  
Author(s):  
Arash E. Zaghi ◽  
Siavash Soroushian ◽  
Alicia Echevarria Heiser ◽  
Manos Maragakis ◽  
Amvrossios Bagtzoglou
Keyword(s):  
Numerical Model ◽  
Development And Validation
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