Faculty Profiles - TADA Naoya

Papers - TADA Naoya

Division display 81 - 100 of about 154 ／ All the affair displays >>

POTENTIAL DIFFERENCE AROUND SEMI-ELLIPTICAL CRACK ON THE OUTER SURFACE OF PIPE FOR NON-DESTRUCTIVE EVALUATION OF CRACK BY DC-PDM Reviewed

Naoya Tada, Makoto Uchida, Hiroki Maeda

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE 2010, VOL 5 215 - 222 2010

Plastic behaviour and forming limit during biaxial compressions of magnesium alloy AZ31 at room temperature

I. Shimizu, N. Tada

ICEM 14: 14TH INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS, VOL 6 6 16001-1-16001-2 2010

The Effect of Heterogeneity of Microstructure on the Micro- to Macroscopic Non-Uniform Elasto-Viscoplastic Deformation Behavior of Polymeric Material

Makoto Uchida, Naoya Tada

Proceedings of PLASTICITY '10: The Sixteenth International Symposium on Plasticity and Its Current Applications 298 - 300 2010

Evaluation of orientation-dependent geometry of micro triangular indentation on grain of polycrystalline alpha-titanium

I. Shimizu, N. Tada, T. Ishida

FOURTH INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS 7522 60 - 60 2010

NUMERICAL SIMULATION FOR IDENTIFICATION OF SEMI-ELLIPTICAL CRACK ON THE INNER SURFACE OF PIPE BY MEANS OF DIRECT-CURRENT ELECTRICAL POTENTIAL DIFFERENCE METHOD WITH MULTIPLE-PROBE SENSOR Reviewed

Naoya Tada, Makoto Uchida, Hiroki Ishikawa

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE 2009, VOL 5 257 - 263 2010

解説高温における材料寿命予測法

多田直哉

検査技術 15 ( 10 ) 23 - 29 2010

解説直流電位差法を用いたき裂評価技術の現状 Reviewed

多田直哉, 浜田晴一

非破壊検査 59 ( 5 ) 204 - 208 2010

A Fracture Mechanics Approach for Evaluating the Effects of Heat Aging on Fatigue Crack Growth of Vulcanized Natural Rubber Reviewed

Prabhakar Soma, Naoya Tada, Makoto Uchida, Kazunari Nakahara, Yoshifumi Taga

Proc. of the Asian Pacific Conference for Materials and Mechanics 2009, The Japanese Society of Mechanical Engineers a138 2009

Research and Education in the Field of Applied Solid Mechanics Reviewed

Naoya Tada

Proc. 2009 International Symposium on Total Engineering Education, East China University of Science and Technology 167 - 174 2009

Regional Identification by Digital Height Correlation of Nanolevel Surface Profile

N.Tada, N.Yagi, I.Shimizu, M.Uchida

Final Program and Abstracts, SEM 2009 Fall Symposium and Workshop, Advanced Image-Based Measurement Methods: Recent Developments and Applications in Engineering and Medicine, The Society for Experimental Mechanics, Inc. 15 - 15 2009

Electric Field Analysis of Simultaneous Evaluation of Crack on Inner Surface of Pipe and Pipe Wall Thickness Using Direct-Current Potential Difference Method of Multiple-Probe Type Reviewed

Naoya Tada, Makoto Uchida

Abstract book the 12th International Conference on Pressure Vessel Technology, Korean Society of Pressure Vessels & Piping 563 - 570 2009

Evaluation of geometry of semi-elliptical crack by direct current potential difference method based on potential difference distribution in two orthogonal directions

Makoto Uchida, Hiroki Ishikawa, Naoya Tada

Conference Handbook of the 13th Asia-Pacific Conference on NDT, 2009 248 248 - 248 2009

APPLICATION OF DIRECT-CURRENT POTENTIAL DIFFERENCE METHOD TO EVALUATION OF VARIOUS DAMAGES IN CONDUCTIVE MATERIALS Reviewed

Naoya Tada

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, VOL 5 183 - 189 2009

Numerical Study on Reducing Methods of Static Strain along the Fillet on Upper Deck of Diesel Engine Cylinder Block Reviewed

Katsuyuki Iguchi, Naoya Tada, Ichiro Shimizu, Kouji Iwasaki

Proc. the 12th International Conference on Fracture 2009

Finite Element Analysis of Static Strain along the Fillet on Upper Deck of Diesel Engine Cylinder Block Produced by Tightening of Cylinder Head Bolts

IGUCHI Katsuyuki, TADA Naoya, SHIMIZU Ichiro

Transactions of the Japan Society of Mechanical Engineers Series B 74 ( 744 ) 1053 - 1059 2008.8

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

The distribution of static strain along the fillet on an upper deck of cylinder block and its dependency on the depth of thread engagement for cylinder head bolts were evaluated for a diesel engine by the finite element method. Since the fillet on upper deck is one of the critical parts in the cylinder block that may be cracked by stress and strain concentration, the static strain along the fillet was focused on in this study. In the model, the static tightening force of cylinder head bolts balanced with the total force acting on the cylinder block. A uniform surface pressure calculated by the total force divided by the contact area was given to the upper deck. The following results were obtained.<BR>The static strain along the fillet was dependent on the circumferential direction of cylinder and its value was varied with the depth of thread engagement for cylinder head bolts. The optimum depth of thread engagement was determined to be about 100 mm from the viewpoints of the overall magnitude of strain, the circumferential fluctuation of strain, the change rate of strain against the depth of thread engagement, and the length of cylinder head bolt. The calculated circumferential distribution of the static strain and the tightening force were compared with the measurement results under the optimum depth of thread engagement condition. Both results agreed well and this fact suggests that the present analysis is useful for optimizing the structural design of cylinder block for diesel engines.

DOI： 10.1299/kikaia.74.1053

CiNii Article

CiNii Books

researchmap

Other Link： https://jlc.jst.go.jp/DN/JALC/00318143567?from=CiNii

Tensile Test of Notched Thin Film of Pure Titanium Actuated by Thermal Stress

TADA Naoya, SHIMIZU Ichiro, UEMORI Kazumasa, TADA Hiroyuki

Transactions of the Japan Society of Mechanical Engineers Series B 74 ( 737 ) 137 - 144 2008.1

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

Tensile tests of notched thin film of pure titanium were carried out on the stage of a digital microscope. Tensile load was generated by the thermal expansion of a pair of polycarbonate loading plates by which the specimen was sandwiched. Since the thermal expansion coefficient of polycarbonate is much larger than that of pure titanium, the specimen was elongated with an increase in the temperature and successfully fractured at the end of the tensile test. The plastic deformation of the notched part of specimen was observed during the test and the stress and strain were evaluated. The obtained stress-strain curve situated between two curves by a commercial tensile testing machine at the room temperature and at 363 K, which approximately corresponds to the maximum temperature of the thermal stress-actuated tensile test. As the mechanism of the proposed tensile test is simple, it is expected to be applicable to much smaller specimens in the future.

DOI： 10.1299/kikaia.74.137

CiNii Article

CiNii Books

researchmap

Other Link： https://jlc.jst.go.jp/DN/JALC/00307954976?from=CiNii

Influence of Crystallographic Orientation upon Microscopic Indentation Shape on Pure Titanium Reviewed

SHIMIZU Ichiro, TADA Naoya

journal of the Japan Society for Testing Materials 57 ( 3 ) 249 - 254 2008

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Materials Science, Japan

A micro indentation testing has been used to investigate the local mechanical properties of engineering materials. Since the size of indentation becomes much smaller than the average grain size of ordinary metallic materials by that testing, the results must be influenced more or less by the characteristics of each grain in which the indentation is imposed. However, the influences of crystal orientation of the grain upon the indentation results have scarcely been investigated for polycrystalline metals. In the present study, the micro indentation tests were performed on the grains of commercially pure titanium, of which the crystal orientations were evaluated beforehand by an electron back scattering diffraction technique. The relationships between the crystal orientation and the resultant indentation shapes as well as the indentation hardness values were then experimentally investigated. The results showed clear orientation dependences of the indentation shape and indentation hardness for the titanium grains. The anisotropy and the distortion of indentation profile tended to increase, while the obtained indentation hardness tended to decrease with increase in the angle between <0001> direction and the surface normal direction. The distortion of the indentation shape was found to appear due to the pile-up of materials in the limited area around the indentation by the restricted plastic flow with regard to the crystal orientation. These results are supposed to indicate the possibility to use an indentation made on grain's surface for the identification of its crystal orientation in polycrystalline titanium.

DOI： 10.2472/jsms.57.249

CiNii Article

CiNii Books

researchmap

Other Link： https://jlc.jst.go.jp/DN/JALC/00310940850?from=CiNii

Effect of Tensile Direction, Strain Rate and Mesostructure on Deformation Behavior of Rubber Blended Semi-Crystalline Polymers Reviewed

UCHIDA Makoto, KITANORI Yoshiharu, TADA Naoya

journal of the Japan Society for Testing Materials 57 ( 3 ) 243 - 248 2008

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Materials Science, Japan

To elucidate the deformation behavior of rubber blended semi-crystalline polymers, the micro- to mesoscopic structure and its mechanical behavior was modeled by using large-deformation finite element homogenization method. In this paper, the effect of direction and strain rate of tensile loading, volume fraction of rubber particle and distance between rubber particles was investigated by numerical simulations of uniaxial tension of semi-crystalline polymer with uniformly distributed rubber particles. A series of computational result clarified the followings. The stress in earlier stage of the deformation, where the stress increases linearly with the strain, is high when the volume fraction of rubber particles is small, when distance between rubber particles is small, and when the load is applied parallel to the nearest neighbor direction. That in following stage, where the stress increases non-linearly with the strain, is high when the volume fraction of rubber particles is small and when tensile strain rate is high. Furthermore, change in the local strain rate and mean stress distribution with the increase in the global tensile strain rate is closely related to the distance between rubber particles and tensile direction.

DOI： 10.2472/jsms.57.243

CiNii Article

researchmap

Effect of Bead Position on Stress Distribution along the Fillet on Upper Deck of Diesel Engine Cylinder Block with Dry Liner Structure Reviewed

Katsuyuki Iguchi, Naoya Tada, Ichiro Shimizu, Kouji Iwasaki

Proc. ACMFMS2008, Shimane University, Japan 409 - 412 2008

Strain Path Dependent Plastic Behavior of Aluminum by Unidirectional and Cyclic Biaxial Compressions Reviewed

Ichiro Shimizu, Naoya Tada

Proc. ACMFMS2008, Shimane University, Japan 165 - 168 2008

　 PREV - NEXT 　

< TADA Naoya >

Papers - TADA Naoya