Assistant Professor

HAKOYAMA Tomoyuki
Title
Assistant Professor
Department
Department of Mechanical Engineering
Course
Mechanical Engineering Course

Research fields

　For the weight reduction of transportation vehicles, the use of the light weight material such as high strength steel or aluminum alloy is increasing. However these materials have low formability. Therefore the role of the numerical calculation method (e.g. finite element analysis) become more important. The predictive accuracy of the elasto-plasticity analysis is domminated by the accuracy of the material model.

Current research topics are as follows:

1. Development of a material model identification method using multi-axial material test
Easy and accurate identification method using the digital image correlation and the inverse analysis is being investigated.

2. Development of material model identification method using crystal plasticity analysis
Real-test-less material model identification using the macroscopic deformation behavior calculated by the virtual tensile test with crystal plasticity is being investigated.

3. Crystal texture measurement and application using neutron beam
Neutron beam is the useful tool for the non-destructive measurement because the penetration of the neutron beam is larger than the electron beam and X-ray. The optimization of the texture measurement system using neutron beam and its application is being investigated.

Fig.1 Comparison of the sheet forming and the finite element analysis Fig.2 Measurement of the deformation behavior using the digital image correlation

Research Keywords

Elastoplasticity Theory, Metal Forimig, Computational Engineering, Quantum Beam Measurement

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