A5012285145- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- High Temperature Alloys and Creep
- Metallurgy and Material Forming
- Non-Destructive Testing Techniques
- Magnetic Properties and Applications
- Dental Implant Techniques and Outcomes
- Material Properties and Failure Mechanisms
- Mechanical stress and fatigue analysis
- Aluminum Alloy Microstructure Properties
- Mechanical Engineering and Vibrations Research
- Superconducting Materials and Applications
- Metal Forming Simulation Techniques
- Nuclear Materials and Properties
- Fire effects on concrete materials
- Hydrogen embrittlement and corrosion behaviors in metals
- Material Properties and Applications
- Fusion materials and technologies
- Probabilistic and Robust Engineering Design
- Engineering Structural Analysis Methods
- Dental Radiography and Imaging
- Welding Techniques and Residual Stresses
- Surface Treatment and Residual Stress
- Metal and Thin Film Mechanics
- Dental materials and restorations
Tokyo University of Science
2015-2024
National Institute of Advanced Industrial Science and Technology
2013
Chuo University
2011
The University of Tokyo
1980-2009
Institute of Metal Research
1984-1993
Northwestern University
1990
Yokohama National University
1984-1985
Japan Organization for Metals and Energy Security (Japan)
1983
A three-dimensional finite element model of the lower first premolar, with three layers enamel, dentin, and pulp, mandible, two cortical cancellous bones, was directly constructed from noninvasively acquired CT images. This used to develop a system analyze stresses on teeth supporting bone structure during occlusion based method examine possibility mechanical simulation.
The objective of this study was to evaluate the influences enamel shape and bracket base configuration on shear bond strength from a biomechanical point view. To end, test stress analysis using finite element method (FEM) were performed. Results obtained both tests then comprehensively investigated. Maxillary incisors prepared for plane specimens, while mandibular premolars curvature specimens. Shear carried out with three different conditions. Two models also created. An approximate mean...
By means of finite element analysis, the optimal thickness fiber framework placed in a fiber-reinforced composite bridge replacing mandibular first molar was obtained. Test results demonstrated that more than 30% maximum principal stress reduced by reinforcing with up to 0.6 mm for 1.5-mm occlusal clearance. Indeed, generated lower embrasure connectors from 107 MPa 70 maximizing reinforcement effect.
A new method is proposed for calculating the steady-state creep rate of a composite, when inclusion geometry and matrix law are known. The demonstrated in simple two-dimensional problem. During creep, an increment plastic strain causes jump displacement on interface between individual elastic inclusion. counterbalanced by that due to diffusion sliding interface. determined normal force distributed tangential force. From these forces, average stress inclusions calculated; it proportional...
It is critical to clarify orthodontic load transfer mechanism from tooth alveolar bone, and determine the influence of applied force on behaviour. In this study, two dimensional (2-D) finite element (FE) models were constructed simulate mechanical behaviour observed during initial movement periodontal ligament (PDL) deformation, evaluate effects presence PDL various restraint sites A 2-D solid FE model tooth-PDL-alveolar bone system was investigated into stress distribution pattern...
The present study investigates plasticity-induced martensitic transformation in two types of austenitic stainless steels SUS 304 and 316 L subjected to uniform tensile stresses at room liquid nitrogen temperatures. X-ray diffraction method was used order measure volume fractions transformed α' ε phases obtain the dependence these on applied strain level ε. difficulty measurement by caused preferred orientation which had been introduced during rolling process tests overcome help Arnell's...
The present paper proposes a new model of fatigue process for smooth unnotched materials; namely, Monte Carlo simulation in which the fracture materials is composed initiation, growth and coalescence randomly distributed small surface cracks.Based on proposed, an analysis was made by using experimental results initiation behavior cracks corrosion HT 60 steel. In analysis, statistical nature their sites, lengths were taken into consideration.The proposed may be applicable to evaluation damage...
The present study investigates a method for the non-destructive detection of damage in an austenitic stainless steel SUS 304 by use martensitic transformation. Volume fraction α' martensite transformed uniformly stretched SUS304 plates was measured and expressed as fu nction applied strain level ε. distributions phase plastic wake regions produced around fatigue cracks were then electromagnetically fatigued plate specimens. results compared with magnetic flux density B_{z} above specimens...
The present study has attempted to simulate the growth of a fish-eye crack in very high cycle fatigue strength steel SUJ2 by using 3D FEM. A half model round-bar type cantilever rotating bending test specimen was used FEM simulation. facet-like region around non-metallic inclusion, which is often called ODA, or optically dark area, considered as incipient crack. size increments along periphery elliptic were calculated from distribution stress intensity factor value and an empirical Paris law...