scholarly journals Numerical Modelling and Mechanical Characterization of Pure Aluminium 1050 Wire Drawing for Symmetric and Axisymmetric Plane Deformations

2020 ◽  
Vol 7 (4) ◽  
pp. 539-548
Author(s):  
Omolayo M. Ikumapayi ◽  
Benjamin I. Attah ◽  
Samuel O. Afolabi ◽  
Olurotimi M. Adeoti ◽  
Ojo P. Bodunde ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Numerical Modelling ◽  
Frictional Coefficient ◽  
Ductile Failure ◽  
Wire Drawing ◽  
Modelling And Simulation ◽  
Large Network ◽  
Pure Aluminium ◽  
Different Diameters ◽  
Plane Deformations

This present paper focused on the numerical modelling and simulation of the influence of friction and drawing tension while validating it with experimental results for both symmetric and axisymmetric plane deformations in stranded and unstranded wire drawing of pure aluminium. It must be noted that several methods have been deployed in recent years such as empirical, numerical, mathematical, analytical, as well as experimental in analyzing and optimizing forces and stresses in wire drawing and there are no definite solutions yet in solving the numerical complexities involved as a result of enormous number of factors during the wire drawing operation. On this note, modelling and simulation with different cases had been established. In this study, 9.50 mm was drawn into different diameters having 4.4 mm as entry and 1.7 mm as exit with intermediate sizes. It was established in the study that half conical angle must be kept as moderate as possible, it must not be too high or too low. An increase in reduction ratio (deformation) leads to an increase in tensile strength and that the tensile strength of material during wire during increases with an increase in the frictional coefficient. The fractographical examination revealed that unstranded aluminium drawn wire is more ductile due to the presence of a large network of dimples which are bimodal and equiaxed dominated by a cup and cone structures and this can be attributed to the ductile failure mode. Whereas the stranded aluminium-drawn wire possessed low ductility as revealed in fractography due to the presence of “Rock Candy fracture”.

Elaboration of Architectured Copper Clad Aluminium Composites by a Multi-Step Drawing Process

2018 ◽  
Vol 941 ◽  
pp. 1914-1919
Author(s):  
Florent Moisy ◽  
Antoine Gueydan ◽  
Xavier Sauvage ◽  
Clément Keller ◽  
Alain Guillet ◽  
...  
Keyword(s):  
Image Processing ◽  
Plastic Deformation ◽  
Room Temperature ◽  
Annealing Treatment ◽  
Wire Drawing ◽  
Al Composite ◽  
Microscopy Image ◽  
Deformation Level ◽  
Different Diameters ◽  
Drawing Method

Architectured copper clad aluminium composites processed by a restacking drawing method at room temperature are reported in this work. Wires were drawn to severe plastic strain without any intermediate annealing. Three different diameters were studied in order to examine the influence of a different plastic deformation level on the structure of the different wires. Thanks to image processing it has been shown that independently of the plastic deformation, inserted fibers remain continuous and are homogeneous in size and shape. Furthermore, XRD and TEM characterizations confirm that there is no significant intermetallic growth during the deformation. Thus, the improvement and/or degradation of the functional properties of the wires can be well controlled by performing an appropriate post-processing annealing treatment. Keywords: Cu/Al composite, architectured wire, drawing, microscopy, image processing

scholarly journals Modelling and simulation of ductile failure in textured aluminium alloys subjected to compression-tension loading

2019 ◽  
Vol 118 ◽  
pp. 36-69 ◽  
Author(s):  
Bjørn Håkon Frodal ◽  
Lars Edvard Blystad Dæhli ◽  
Tore Børvik ◽  
Odd Sture Hopperstad
Keyword(s):  
Aluminium Alloys ◽  
Ductile Failure ◽  
Modelling And Simulation ◽  
Tension Loading

Numerical modelling and simulation of non-uniformly doped channel 6H-silicon carbide MOSFET

2003 ◽  
Vol 19 (3) ◽  
pp. 373-379 ◽  
Author(s):  
Navneet Kaushik ◽  
Subhasis Haldar ◽  
Mridula Gupta ◽  
R S Gupta
Keyword(s):  
Silicon Carbide ◽  
Numerical Modelling ◽  
Modelling And Simulation

Tensile Tests for Cast Stainless Steel: Evolution of the RCC-M Code

2018 ◽  
Author(s):  
Arnaud Blouin ◽  
Mathieu Couvrat ◽  
Félix Latourte ◽  
Julian Soulacroix
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Ultimate Tensile Strength ◽  
Tensile Tests ◽  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Different Diameters ◽  
Cast Stainless Steel ◽  
Acceptance Tests ◽  
Do So

In the framework of a pressurized water reactor primary loop replacement, elbows of different types were produced in cast austenitic stainless steel grade Z3CN 20-09 M. For that type of component, acceptance tests to check the sufficient mechanical properties include room and hot temperature tensile tests, following the RCC-M CMS – 1040 and EN 10002 specifications. A large test campaign on standard 10mm diameter specimens was performed and exhibited a high scattering in yield stress and ultimate tensile strength values. As a consequence, some acceptance tensile tests failed to meet the required minimal values, especially the ultimate tensile strength. Optical and electronic microscopy revealed that the low values were due to the presence of very large grain compared to the specimen gage diameter. However, tensile tests strongly rely on the hypothesis that the specimen gage part can be considered as a representative volume element containing a number of grains large enough so that their variation in size and orientation gives a homogeneous response. To confirm the origin of the scattering, a huge experimental tensile test campaign with specimens of different diameters was conducted. In parallel, FE calculations were also performed. From all those results, it was concluded that it was necessary to improve the RCC-M code for that type of test for cast stainless steel: to do so, a modification sheet was sent and is being investigated by AFCEN.

Computer Simulation of Nanoparticle Aggregate Fracture

2007 ◽  
Vol 1056 ◽  
Author(s):  
Takumi Hawa ◽  
Brian Henz ◽  
Michael Zachariah
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Computer Simulation ◽  
Tensile Strength ◽  
Direct Relationship ◽  
Brittle Materials ◽  
Ductile Failure ◽  
Strain Behavior ◽  
Nanoparticle Aggregate ◽  
Nanoparticle Aggregates

ABSTRACTNanoparticle aggregates have been found to possess unique mechanical properties. Aggregates of metal nanoparticles can be strained up to 100% before failure, and even typically brittle materials are observed to have a ductile failure mode. In this effort two materials; namely silver and silicon, were chosen to represent ductile and brittle materials, respectively. Aggregates with 2 to 6 particles were simulated using the molecular dynamics (MD) algorithm to determine the stress-strain behavior of the aggregate. Many interesting observations are made including the negligible affect of strain rate on ultimate tensile strength, and the direct relationship between Young's modulus and nanoparticle size.

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