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Your search keyword '"Duc Toan Nguyen"' showing total 5 results
Start Over Author "Duc Toan Nguyen" Journal proceedings of the institution of mechanical engineers, part b: journal of engineering manufacture
5 results on '"Duc Toan Nguyen"'

1. Experimental study on the chip morphology, tool–chip contact length, workpiece vibration, and surface roughness during high-speed face milling of A6061 aluminum alloy

Author

Tien-Long Banh, Duc-Toan Nguyen, Van-Canh Tong, and Thi-Hoa Pham

Subjects
0209 industrial biotechnology, Insert (composites), Materials science, Mechanical Engineering, Alloy, chemistry.chemical_element, 02 engineering and technology, engineering.material, Chip, Industrial and Manufacturing Engineering, Carbide, Vibration, 020303 mechanical engineering & transports, 020901 industrial engineering & automation, 0203 mechanical engineering, chemistry, Aluminium, Milling cutter, engineering, Surface roughness, Composite material
Abstract

In this study, experiments of high-speed face milling of A6061 aluminum alloy with a carbide insert milling cutter under dry cutting conditions were conducted. The contact length between tool and chip, the workpiece vibration amplitude, and the arithmetic average surface roughness were measured under varying cutting conditions (cutting speed, feed rate, and depth of cut). The characteristics of chip morphology were observed using scanning electron microscope. Experimental results showed that the increasing cutting speed reduced the tool–chip contact length, the workpiece vibration, and the surface roughness. The tool–chip contact length, the workpiece vibration, and the surface roughness were all increased with increasing cutting depth and feed rate. The results of chip morphology showed that the chips with serrated form were generated under high-speed cutting conditions. Moreover, scratch lines, plastic deformation cavities, and local molten chip material were observed on the slide chip surface.

Published
2019
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3. Finite element method study of incremental sheet forming for complex shape and its improvement

Author

Yee-Hyuk Kim, Jingee Park, Ho-Gil Lee, and Duc-Toan Nguyen

Subjects
Engineering, Engineering drawing, business.industry, Mechanical Engineering, Cutter location, Structural engineering, Industrial and Manufacturing Engineering, Finite element method, Taguchi methods, visual_art, Computer-aided manufacturing, visual_art.visual_art_medium, Formability, Orthogonal array, business, Sheet metal, Incremental sheet forming
Abstract

In order to improve the incremental sheet forming process for the product of complex shape (e.g. human face), a combination of both computer-aided manufacturing (CAM) and finite-element modelling (FEM) simulation, is implemented and evaluated from the histories of stress and strain value by means of finite-element analysis. Here, the results, using ABAQUS/Explicit finite-element code, are compared with forming limit curve at fracture in order to predict and improve the forming conditions by changing process variables of tool radius, tool down-step, and friction coefficient according to the orthogonal array of Taguchi's method. First, the CAM simulation is used to create cutter location data. This data are then calculated, modified, and exported to the input file format required by ABAQUS through using MATLAB programming. The FEM results are implemented for negative incremental sheet forming and then investigated by experiment.

Published
2010
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4. Combination of isotropic and kinematic hardening to predict fracture and improve press formability of a door hinge

Author

Duc-Toan Nguyen and Y.-S. Kim

Subjects
Engineering, business.industry, Mechanical Engineering, Stress–strain curve, Isotropy, Hinge, Structural engineering, Industrial and Manufacturing Engineering, Finite element method, visual_art, visual_art.visual_art_medium, Fracture (geology), Formability, Tola, business, Sheet metal
Abstract

To predict a fracture in the concentrated stress and strain area of a door hinge, the criterion for a ductile fracture, as developed by Oyane ( Journal of Mechanical Work. Technology

Published
2009
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5. Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures

Author

Duc-Toan, Nguyen and Young-Suk, Kim

Abstract

The aim of this study involved evaluating and predicting forming limit curves of boron steel 22MnB5 sheet at elevated temperatures. A finite-element method simulation was adopted based on ductile fracture criteria and simple experiments at elevated temperatures. First, tensile experimental data and ductile fracture criterions of Johnson–Cook and ductile void growth models were input to ABAQUS/Explicit software to predict and compare the same with fracture occurrence in experiments performed via Hecker’s punch stretching tests at room temperature. Subsequently, punch stretching test data at room temperature were added to correct the fracture strain locus in the space of the stress triaxiality and the equivalent strain following the ductile void growth model. After confirming the accuracy of the forming limit curve prediction at room temperature, fracture strain loci at high temperatures using ductile void growth model were determined based on the average ratio between the fracture equivalent plastic strains at room temperature as well as higher temperatures. Finally, Hecker’s punch stretching tests were numerically simulated to predict forming limit curve(s) of boron steel 22MnB5 sheet at high temperatures.

Published
2020
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