scholarly journals Modelling of the Guillotine Cutting Process by Means of a Symmetrical Blade with the Defined Geometry

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5404
Author(s):  
Jarosław Kaczmarczyk
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Tool ◽  
Cutting Process ◽  
Experimental Investigations ◽  
The Finite Element Method ◽  
Complex State ◽  
Highly Nonlinear ◽  
Cutting Processes ◽  
Element Method

This paper modelled the cutting process of a bundle consisted of ultra-thin cold-rolled steel sheets using a guillotine. The geometry of a cutting tool with given dimensions was assumed. A bundle of sheets being cut was modelled as deformable, the cutting tool was rigid, and the finite element method along with computer system LS-DYNA was employed. Numerical simulations of the complex state of stress and of the corresponding complex state of strain were carried out. Cutting processes belong to fast changing physical phenomena, and therefore, highly nonlinear dynamical algorithms were applied in order to solve this particular problem. Experimental investigations were also conducted by means of the scanning electron microscopy. It was found that the fracture region consisted of two distinct zones: brittle and ductile separated from each other by the interfacial transition. Morphological features of the brittle, ductile, and the transition regions were identified. The ductile and brittle zones were separated at the depth of ca. 1/5 thickness of the cut steel sheet. Finally, the numerical results obtained by usage of the finite element method as well as experimental ones in the form of microscopic images were compared, showing quite good agreement.

scholarly journals Calculation of temperature fields during lathe machining with thermoelectric cooling by using the finite element method

2019 ◽  
Vol 23 (3 Part B) ◽  
pp. 1889-1899
Author(s):  
Radovan Nikolic ◽  
Miroslav Lucic ◽  
Bogdan Nedic ◽  
Miroslav Radovanovic
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Cutting Tool ◽  
Thermoelectric Module ◽  
Temperature Fields ◽  
Prototype Model ◽  
The Finite Element Method ◽  
Element Method

The aim of this work is to explore the possibilities of the implementation of systems based on a thermoelectric module for cooling the cutting tool. This cooling becomes significant when it is not possible to use conventional coolants and lubricants. Starting from existing mathematical models for the calculation of the temperature field of the cutting tool, a mathematical model is developed that takes into account the cooling based on the thermoelectric module. The use of the finite element method determines temperature field when dry lathe machining in the cooling conditions based on the thermoelectric module. The Software package, PAK-T, is used for the calculations and was developed at the Department of Applied Mechanics, Faculty of Engineering in Kragujevac, Serbia. The system for cooling the cutting tool based on the thermoelectric module was realized under laboratory conditions on a prototype model, which consists of a cutting tool and a thermoelectric module. Verification of the obtained results was carried out on the basis of a mathematical model by experimental research of the temperature field of the cutting tool in terms of cooling based on a thermoelectric module.

scholarly journals Heat partition effect on cutting tool morphology in orthogonal metal cutting using finite element method

Mechanika ◽  
2019 ◽  
Vol 25 (4) ◽  
pp. 326-334
Author(s):  
Kamuran Kamil YEŞİLKAYA ◽  
Kemal YAMAN
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Distribution ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Thermal Analyses ◽  
Cutting Process ◽  
Heat Partition ◽  
Coated Tools ◽  
Element Method

It is widely accepted that heat partition and temperature distribution for metal cutting process have a significant effect on the morphological features of the cutting tool. Tool life and cutting accuracy are considerably affected by temperature distribution and heat transfer mechanisms on the tool. When a finite elements model is accurately generated, an understanding of heat partition into the cutting tool without performing experiments can be gained. This study has been completed with the use of uncoated and coated tools in order to predetermine heat partition value entering the cutting tool. In terms of coated tools, tool coating was investigated to assess its effects on heat partition. Finite Element Method was mainly used in combination with the previously generated experimental data in literature. Three-dimensional uncoated and coated models were created and made compatible with finite element modeling software to be able to perform thermal analyses of the cutting process. Finite element transient and steady-state temperature values were calculated and hence the heat intensity value for the cutting tool was determined.

scholarly journals Accelerating the Finite-Element Method for Reaction-Diffusion Simulations on GPUs with CUDA

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 881 ◽  
Author(s):  
Hedi Sellami ◽  
Leo Cazenille ◽  
Teruo Fujii ◽  
Masami Hagiya ◽  
Nathanael Aubert-Kato ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temporal Dynamics ◽  
Dna Nanotechnology ◽  
Reaction Diffusion ◽  
Reaction Diffusion Equations ◽  
The Finite Element Method ◽  
Highly Nonlinear ◽  
Spatio Temporal ◽  
Element Method

DNA nanotechnology offers a fine control over biochemistry by programming chemical reactions in DNA templates. Coupled to microfluidics, it has enabled DNA-based reaction-diffusion microsystems with advanced spatio-temporal dynamics such as traveling waves. The Finite Element Method (FEM) is a standard tool to simulate the physics of such systems where boundary conditions play a crucial role. However, a fine discretization in time and space is required for complex geometries (like sharp corners) and highly nonlinear chemistry. Graphical Processing Units (GPUs) are increasingly used to speed up scientific computing, but their application to accelerate simulations of reaction-diffusion in DNA nanotechnology has been little investigated. Here we study reaction-diffusion equations (a DNA-based predator-prey system) in a tortuous geometry (a maze), which was shown experimentally to generate subtle geometric effects. We solve the partial differential equations on a GPU, demonstrating a speedup of ∼100 over the same resolution on a 20 cores CPU.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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