Jun SHINOZUKA, Ph.D.

Associate Professor,
Department of Mechanical Engineering and Materials Science
Yokohama National University, Japan

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This page has opened to public since April 14 2008.

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Last update April 14 2008

What is this? Jun Shinozuka

Academic Background

Jun Shinozuka What is this?
Associate Professor Yokohama National University, Japan 2008-
Lecturer Ibaraki University, Japan 2005-2008
Assistant Professor Tokyo Institute of Technology, Japan 1996-2005
Ph.D, Tokyo Institute of Technology, Japan 1998
M.E, Tokyo Institute of Technology, Japan 1993
B.E, Tokyo Institute of Technology, Japan 1991

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Unauthorized duplication shall be a violation of applicable laws.

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rball Development of Ultra High-Speed Cutting Tester
gball Propagation of Elastic Stress Waves
gball Propagation of Elastic Plastic Stress Waves
gball Interference of Stress Waves (Spalling)
gball Ultra High-Speed Impact Problem
gball Ultra High-Speed Impact Problem: Appendix
bball Unsteady State Metal Cutting Processes
bball Ultra High-Speed Cutting Processes
bball Static Metal Cutting Mechanics
bball Stirling and Steam Engine
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CUTTING EXPERIMENT


Ultra high-speed cutting tester
Look at me Development of Ultra High-Speed Cutting Tester

High-speed and ultra high-speed cutting tester have been developed to investigate cutting phenomena. The testers are airgun type; cutting tool or workpiece is accelerated by compressed air. Cutting speed 150 m/s can be achieved in atomosphere condition so far. The tester have been improved to achieve much faster cutting speed.


DYNAMIC FEM SIMULATION

Two dimensional Impact and orthogonal cutting processes in unsteady state and ultra high-speed cutting

Propagation of Elastic Stress Waves
Look at me Propagation of Elastic Stress Wave

This page shows FEM(finite element method) simulations of propagation of an elastic stress wave by using FEM simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.

Propagation of Plastic Stress Waves
Look at me Propagation of Elastic Plastic Stress Waves

This page shows FEM(finite element method) simulations of propagation of elastic plastic stress waves by using FEM simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.

Interference of Stress Waves ( Spalling )
Look at me Interference of Stress Waves (Spalling)

This page shows FEM(finite element method) simulations of spalling phenomenon by using FEM simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.


Impact problem
Look at me Ultra High-Speed Impact Problem

This page shows FEM(finite element method) simulations of ultra high-speed impact by using FEM simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.

Impact problem:Appendix
Look at me Ultra High-Speed Impact Problem : Appendix

This page shows FEM(finite element method) simulations of various type of ultra high-speed impact by using FEM simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.


unsteady state cutting
Look at me Unsteady State Metal Cutting Processes

This page shows FEM(finite element method) simulations for metal cutting processes in unsteady state by using dynamic FEM cutting simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.


Ultra High-speed cutting
Look at me Ultra High-Speed Cutting Processes

This page shows FEM(finite element method) simulations for metal cutting processes in ultra high-speed cutting by using dynamic FEM cutting simulator that I have developed. The FE analysis is based on a dynamic and thermo elastic plastic finite element method. The programing language of the core of FEA is Fortran and that of a drawing software of the results is Microsoft Visual C#.NET. I have also developed the drawing software.


STATIC METAL CUTTING MECHANICS

Orthogonal metal cutting FEM simulation, Chip Breaking process FEM simulation

Look at me Formulation of Finite Element Method

Examples of Finite Element Method Simulations
( You can see Animation GIF files )

The programing language of FEM was Fortran 77, and simulations were done using EWS (HP9000 model712 715). Graphic program code as the result viewer are written with Visual C#.NET.

sample of FEM sample of FEM
Look at me FEM Simulations of Steady State Cutting Processes

These results are obtained from Thermo-Elastic-Plastic Finite Element Method with Iterative Convergent Method. From these results, we can know easily the cutting performances such as cutting forces, chip shape, the distributions of temperature and stresses on the rake face, and also we can easily evaluate the quality of the machined products. The influences of these cutting performance upon the cutting conditions, material conditions and tool rake face geometry are predicted.

sample of FEM sample of FEM sample of FEM
Look at me FEM Simulations of Chip Breaking Processes

These results are obtained from Thermo-Elastic-Plastic Finite Element Method. From these results, we can know easily whether chip breaks or not, in short, chip breakability. In order to design high performance metal cutting tool, we have to investigate the chip breakability. But it may be impossible in actually to make a lot of types of tool tips and to test them. Numerical simulation such this FEM is very usufull.


Stirling Engine
Look at me Stirling Engine and Steam Engine

This engine is very very gentle to the earth environment. There is no exhaust gas. If temperature gradient can be made, everything can be used for the energy source. That is, the sun energy, terrestrial heat energy, and oceanic energy, etc. can be used.


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