Faculty Profiles - TADA Naoya

506 Study on Deformation Behavior of Polycrystalline Metal during Biaxial Plastic Compression

SHIMIZU Ichiro, TADA Naoya

The Computational Mechanics Conference 2005 ( 18 ) 827 - 828 2005.11

715 Microscopic Deformation Behavior of Polycrystalline Metal during Tensile Plastic Deformation

WANG Xiaoqun, ABE Takeji, TADA Naoya, TORII Tashiyuki

2005 ( 80 ) "7 - 29"-"7-30" 2005.3

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

It is well-known that the hardness of material is related to its mechanical characteristics. The microscopic inhomogeneity of polycrystalline pure titanium is evaluated by testing the micro hardness of the grain for various grain orientation. Namely, the change in the hardness associated with plastic deformation, and the relation between the deformation of grain and the change of the hardness are studied, by measuring hardness before and after tensile deformation. The strains of respective grains are also measured and the effect of grain size is discussed.

Microscopic Surface Change of Polycrystalline Aluminum duringTensile Plastic Deformation

119 The Effect of Pre-Compression on Mechanical Behavior of Industrial Pure Titanium in Uniaxial and Plane Strain Compressions

SHIBUTANI Kyosuke, SHIMIZU Ichiro, TADA Naoya

2005 ( 43 ) 37 - 38 2005.2

Wang Xiaoqun, Abe Takeji, Tada Naoya, Shimizu Ichiro

Memoirs of the Faculty of Engineering, Okayama University 39 ( 1 ) 7 - 15 2005

ひずみ経路可変型二軸圧縮試験機を用いたアルミニウムの交差効果に関する検討 (日本実験力学会講演論文集 2005年度年次講演会) -- (実験力学分野全般(2))

清水一郎, 多田直哉

日本実験力学会講演論文集 ( 5 ) 64 - 66 2005

1755 Relationship between Shape of Indentation by Nanomdenter and Crystal Orientation on Surfaces of Pure Titanium Grains

Shimizu Ichiro, Tada Naoya, Inoue Takatoshi, Wang Xiaoqun, Hosoi Yasunari

The proceedings of the JSME annual meeting 2005 413 - 414 2005

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

The nanoindentation test has been recently developing to evaluate local mechanical properties in micro areas of various materials. In the present study, the nanoindentation tests were performed to grains in polycrystalline pure titanium, which is hexagonal close-packed crystal structure thus has less slip systems than the other crystalline structures. Then the relationship between the crystal orientation and the resultant indentation shape was investigated. The experimental results show the clear orientation dependence of the indentation shape. The obtained hardness value tends to increase when <0001> direction approaches to the direction normal to the sample surface.

DOI： 10.1299/jsmemecjo.2005.1.0_413

834 くし型試験片を用いた純銅細棒の引張り塑性変形に関する微視的検討(塑性変形・変形挙動-III,一般セッション,第53期学術講演会)

234 Changes in Mechanical Properties of Aluminum during Plastic Deformation with Reciprocating Strain Path by Biaxial Compression Test

FUKUOKA Koji, SHIMIZU Ichiro, TADA Naoya

Proceedings of the 1992 Annual Meeting of JSME/MMD 2005 155 - 156 2005

230 Evaluation of Mechanical Properties of Pure Titanium Thin Plate by Tensile Test Method Actuated by Thermal Stress

TADA Hiroyuki, TADA Naoya, SHIMIZU Ichiro, KANAMURA Keigo

Proceedings of the 1992 Annual Meeting of JSME/MMD 2005 145 - 146 2005

Effect of Strain Path on Mechanical Properties of Polycrystalline Metal after Large Plastic Deformation by Biaxial Compression Test

SHIMIZU Ichiro, TADA Naoya

2004 25 - 26 2004.10

Fracture Mechanics 2003に出席して

多田直哉

材料 53 ( 4 ) 471 - 471 2004.4

3D Elasto-Plastic Finite Element Analysis of Deformation Behavior of Sheet Metal in Spinning Process

ASO Masashi, SHIMIZU Ichiro, NAGAYAMA Noriyuki, TADA Naoya

2004 ( 42 ) 121 - 122 2004.3

Observation of Microscopic Deformation Behavior of Ferritic Stainless Steel during Plastic Deformation

KOBORI Masashi, ABE Takeji, TADA Naoya, SHIMIZU Ichiro

2004 ( 42 ) 107 - 108 2004.3

細井康成, 多田直哉, 王暁群, 清水一郎

学術講演会講演論文集 53 541 - 542 2004

829 多結晶金属の引張り塑性変形に伴う表面あれの自己相関関数による評価(塑性変形・変形挙動-II,一般セッション,第53期学術講演会)

宋華林, 阿部武治, 多田直哉

学術講演会講演論文集 53 531 - 532 2004

835 熱応力を利用した薄板引張り試験法に関する実験的検討(塑性変形・変形挙動-III,一般セッション,第53期学術講演会)

金村恵吾, 多田直哉, 清水一郎

学術講演会講演論文集 53 543 - 544 2004

718 EBSD法による多結晶銅の引張りにおける結晶粒の3次元的塑性変形の評価(結晶塑性実解析とマルチスケールモデリング,塑性挙動のモデリングとシミュレーション-ナノからマクロまで-,オーガナイスドセッション5,第53期学術講演会)

近藤了嗣, 多田直哉, 阿部武治

学術講演会講演論文集 53 472 - 473 2004

828 多結晶アルミニウムの引張り塑性変形における微小硬さ変化(塑性変形・変形挙動-I,一般セッション,第53期学術講演会)

王暁群, 阿部武治, 多田直哉, 鳥居太始之

学術講演会講演論文集 53 529 - 530 2004

830 多結晶チタンの繰返し曲げ塑性変形における結晶粒表面形状の定量化に関する検討(塑性変形・変形挙動-II,一般セッション,第53期学術講演会)

岩崎公哉, 阿部武治, 多田直哉, 清水一郎

学術講演会講演論文集 53 533 - 534 2004

Tensile Test of Thin Titanium Plate on the Stage of Microscope Using Thermal Stress

TADA Naoya, SHIMIZU Ichiro, KANAMURA Keigo

The proceedings of the JSME annual meeting 2004 63 - 64 2004

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

Tensile test of a thin notched plate of titanium was conducted on the stage of an optical microscope and the deformation and fracture behavior was observed in situ during the test. In the present study, the notched specimen was sandwiched by two transparent and colorless plates of polycarbonate, which were called "loading plates," and both ends of the specimen were adhered on the inner surfaces of these loading plates. As there is a large difference in linear expansion coefficient between the specimen of titanium and these loading plates of polycarbonate, tensile load is generated by heating them uniformly. Moreover, strain gage was attached on the side of the loading plate and the tensile load was evaluated by the strain and Young's modulus of polycarbonate. As the proposed method of tensile test for thin plates is very simple and, in principle, it is possible to reduce the size of specimen and loading plates, it might be extended to the tensile test for small thin films.

DOI： 10.1299/jsmemecjo.2004.1.0_63