Finite Element Modelling of Orthogonal Cryogenic Machining Process

2016 ◽  
Vol 852 ◽  
pp. 248-254
Author(s):  
S. Sriram ◽  
V. Vignesh ◽  
K.S. Vijay Sekar ◽  
Murugasan Pradeep Kumar
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Modelling ◽  
Thrust Force ◽  
Machining Process ◽  
Maximum Temperature ◽  
Finite Element Models ◽  
Experimental Conditions ◽  
Element Modelling ◽  
Orthogonal Machining

The present work aims in creating the Finite Element Models for the conventional and the Cryogenic Orthogonal machining process. Finite Element Modelling (FEM) of the orthogonal machining operation was performed using DEFORM – 2D which is based on a modified Lagrangian formulation. Finite Element models were developed for various experimental conditions for both conventional and cryogenic orthogonal machining process. The response variables obtained from the models are cutting force, thrust force, temperature, shear stress, strain and strain rate. AISI 1045 steel is used as work material and for tool, tungsten carbide is used under various experimental conditions with the cutting speeds at 100 m/min, 150 m/min, 200 m/min and feeds at 0.07 mm/rev, 0.1 mm/rev, 0.14 mm/rev. A maximum temperature difference of 20.12% is obtained when conventional and cryogenic models were compared at a feed rate of 0.07 mm/rev and cutting speed of 150 m/min. cutting force and thrust force were higher for cryogenic model compared with that of the conventional model. Stress and Strain were distributed as expected to occur in the experiment.

scholarly journals Pushover Tests on Unreinforced Masonry Wallettes Retrofitted with an Innovative Coating: Experimental Study and Finite Element Modelling

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6815
Author(s):  
Jean-Patrick Plassiard ◽  
Mathieu Eymard ◽  
Ibrahim Alachek ◽  
Olivier Plé
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Finite Element Modelling ◽  
Unreinforced Masonry ◽  
Failure Pattern ◽  
Finite Element Models ◽  
Strength Gain ◽  
Continuum Approach ◽  
Element Modelling ◽  
Significant Strength

This paper investigates the mechanical contribution of an innovative coating applied on masonry wallettes compared to a traditional one. In both cases, the multifunctional coatings were insulating coatings intended for thermal refurbishment, but they could also be used to retrofit masonry. Uncoated specimens as well as coated ones were submitted to pushover tests to establish the strength gain. URM walls experienced brittle failures while the coated walls exhibited significant strength gains and strong ductility. The corresponding finite element models were developed. The behaviour of the URM walls was reproduced accurately in terms of strength and failure pattern. Models involving the coatings were used to partially retrieve the behaviour and to highlight the issues of a continuum approach.

Initial imperfections and the initiation of wrinkling in finite element modelling of deep drawing

2000 ◽  
Vol 214 (1) ◽  
pp. 63-73 ◽  
Author(s):  
J Hematian ◽  
P M Wild
Keyword(s):  
Finite Element ◽  
Deep Drawing ◽  
Finite Element Modelling ◽  
Annular Plate ◽  
Finite Element Models ◽  
Essential Requirement ◽  
Element Modelling ◽  
Initial Imperfections ◽  
Different Types ◽  
Out Of Plane

The effect of initial imperfections on the initiation of wrinkling in finite element models of deep drawing operations is assessed. Models of an annular plate are subjected to radial in-plane loading and the effects of different types, magnitudes and distributions of imperfections are investigated. A model of a circular plate subjected to out-of-plane loading from a punch and die is similarly investigated and the results are compared with experimental data. It is confirmed that initial imperfections are an essential requirement for the initiation of wrinkling for the case of in-plane loading. Initial imperfections are shown to be unimportant in the initiation of wrinkling for the case of out-of-plane loading.

Generation of Shakedown Boundaries of Thin-Walled 90-Degree Scheduled Pipe Bends Determined via Large and Small Displacement Finite Element Models

2021 ◽  
Author(s):  
Hany Fayek Abdalla
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Large Displacement ◽  
Plastic Work ◽  
Small Displacement ◽  
Finite Element Models ◽  
Element Modelling ◽  
Fe Simulations ◽  
Thin Walled ◽  
Shakedown Limit

Abstract The present research investigates the effect of employing large displacement in finite element modelling on the generated shakedown (SD) boundaries of thin-walled 90-degree scheduled pipe bends. A recently developed methodology termed: Shakedown Limit - Plastic Work Dissipation (SDLimit-PWD) method generates the SD boundaries via employing the large displacement in the FE simulations. Additionally, a well-established direct non-cyclic technique termed: Shakedown Direct Noncyclic Technique (SD_DNT) generates the SD boundaries via employing the small displacement formulation in the FE simulations. Comparing the SD boundaries generated via both methods illustrated marked increase in the generated SD domains due to employing large displacement.

New Computer Aided Design, Finite Element Modelling and Three-Dimensional Measuring of Rear Screen Creep Forming

1995 ◽  
Vol 209 (2) ◽  
pp. 137-143 ◽  
Author(s):  
D Lochegnies ◽  
E François ◽  
J Oudin
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Computer Aided Design ◽  
Finite Element Modelling ◽  
Three Dimensional ◽  
Finite Element Models ◽  
Element Modelling ◽  
Computer Aided ◽  
Analysis Strategy ◽  
Aided Design

A new analysis strategy for creep forming by coupling computer aided design (CAD), finite element models (FEM) and three-dimensional measuring (3D M) with two new CAD/FEM and CAD/3D M interfaces. From the design product via Bézier curves, the manufacturer is now able to predict and adjust creep forming database (initial form of the sheet, geometry of the skeleton, temperature map in the sheet at the furnace exit and forming time) through CAD and FE modules. A reference rear screen manufacture is optimized using the previous strategy and validated with the experimental data through CAD and 3D M modules.

FEM of ECDM Process on Semi Conducting Materials

2018 ◽  
Vol 877 ◽  
pp. 87-91 ◽  
Author(s):  
Lijo Paul ◽  
P.V. Pradeep ◽  
Donald Antony
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Machining Process ◽  
Micro Machining ◽  
Semiconducting Materials ◽  
Empirical Estimation ◽  
Element Modelling ◽  
Conductive Materials ◽  
Conducting Materials ◽  
Micro Holes

Electro Chemical Discharge Machining (ECDM) process has been developed as an innovative machining process for machining non-conductive materials. The various application of this hybrid process is used in many industries like nuclear, medical and automobile industries. The scope of ECDM in micro machining of semiconducting materials is still found to be promising challenge for researchers. Due to many advanced properties of silicon, its use in MEMS industries is enormous. Many researchers have carried out lot of empirical estimation for discharges in ECDM. However very less work has been reported in the modelling of the ECDM process. Present work mainly concentrates on Finite Element Modelling (FEM) of micro holes machined on silicon wafers with ECDM process. A thermal FEM of spark discharge in the ECDM is carried out. The results from FEM are compared with experimental results and are found to be satisfactory. The model developed can be used for prediction of MRR for a particular combination of workpiece-tool arrangement.

scholarly journals Finite element modelling of cutting force components in face milling

2020 ◽  
Vol 10 (1) ◽  
pp. 119-128
Author(s):  
Csaba Felhő
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
Finite Element Modelling ◽  
Measurement Data ◽  
Face Milling ◽  
Third Wave ◽  
Element Modelling ◽  
Cutting Force Components ◽  
Force Components ◽  
Cutting Processes

This paper presents a study about the Finite Element Modelling of cutting force components acting on the workpiece (Fx, Fy, Fz) in face milling. The values of the three force components were simulated by the FEM software AdvantEdge by Third Wave Systems. This program is uniquely intended for modelling of cutting processes. The simulated cutting force values were compared with real measurement data, and a good correlation was between them.

In situ microtensile testing and X-ray microtomography-based finite element modelling of open-cell metal foam struts and sandwich panels

2014 ◽  
Vol 49 (8) ◽  
pp. 592-606 ◽  
Author(s):  
Charles Betts ◽  
Daniel Balint ◽  
Junyi Lee ◽  
Jianguo Lin ◽  
Peter Lee
Keyword(s):  
Finite Element ◽  
Aluminium Alloy ◽  
Constitutive Equations ◽  
Finite Element Modelling ◽  
Metal Foam ◽  
Sandwich Panels ◽  
Finite Element Models ◽  
Element Modelling ◽  
X Ray ◽  
Microtensile Testing

Microtensile testing was used to determine the mechanical properties of individual aluminium alloy foam struts. Finite element modelling of as-tested struts was carried out using X-ray microtomography scans of the undeformed struts to define the geometry. Strut deformation was described by continuum viscoplastic damage constitutive equations calibrated by microtensile test data of the aluminium alloy in its optimally aged condition. The as-tested strut finite element model was used to develop a procedure that compensates for the effect of grip slippage inherent in the microtensile testing of metal foam struts, which results in a considerable reduction in observed elastic stiffness compared to the typical value of 70 GPa for aluminium alloys. The calibrated constitutive equations were then implemented in finite element models of sandwich panels with the aluminium metal foam as its core material. The finite element models were used in simulations of cases of low energy impact to represent tool drop conditions in order to investigate the suitability of new wing skin designs using metal foam core sandwich panels. An optimal strut aspect ratio was identified through simulation that provides the greatest energy absorption per unit mass while ensuring core damage is accurately reflected by facesheet deformation, which is necessary for detection and repair.

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