異材接合体の応力緩和
セラミックスと金属との拡散接合体は、製作時の残留応力による強度低下が
問題となるため、材料表面の応力集中特性に及ぼす接合界面の形状や製作条件
について熱弾塑性モデルによる有限要素解析を進めている。
主な公表論文等
- Yasushi Fukuzawa, Shigeru Nagasawa, Shigehiko Takaoka: Bonding Strength of W-Cu Joint
by PECS Method, Solid State
Phenomena, Vol.127, pp.271-276 (2007).
- Yasushi Fukuzawa, Shigeru Nagasawa, Masahiro Watanabe, Shigehiko
Takaoka: Joining of
Tungsten-Copper Using Pulse Electric Current Sintering Method,
Materials Science Forum,
Vol.502, pp.443-448, (2005, December).
- Yasushi Fukuzawa, Hiroyuki Morii, Shigeru Nagasawa and Shigehiko
Takaoka: Shape effect of
arbitrary interface on the bonding strength of
T-type joint structure composed of Copper and Tungsten, Proc. of 11th
International Conference on Fracture (CD-ROM), 4071, pp.1-6,
(2005,
March 20-25), Turin(Italy)
- Shigeru Nagasawa, Yuji Yokoyama, Yasushi Fukuzawa, Masayoshi
Tateno: Interface shape effects
on the tensile strength for T-type
structure bonded dissimilar materials, Journal of Materials Research,
Vol.17 No.1, pp.20-25, January 2002.
- Y.Fukuzawa,S.Nagasawa,S.S.Kim:
Effect of Thermal Cycle on
Bonding Strength of Metal-Ceramics Joint,
Journal of High-temperature
Association, Vol.27, No.1, pp.42/47
(2001.1).
- Klementis,O., Lenkey,B., Tisza,M., Shigeru N., Yasushi,F.:
Optimising the contact shape
in case of metal ceramic joined parts,
Simulation of Materials
Processing: Theory, Methods and Applications,
edited by Ken-ichiro Mori, pp. 1125-1129,
Balkeme, Swets & Zeitlinger B.V.Lisse, Netherlands (2001),
ISBN 90-2651-822-6.
- S.Nagasawa,Y.Yokoyama,Y.Fukuzawa,M.Tateno:
Interface Shape Effects on
Reducing the Residual Stress for a T-type
Bonded Dissimilar Material, Advances
in computational engineering and
sciences 2000, Vol.1, pp.1026/1030,
Tech science press(2000.8). (ISBN 0-9657001-3-5)
- M.Tateno,Y.Fukuzawa,S.Nagasawa,H.Takahashi,H.Sakuta:
Investigation of Interface Shape Design for Bonded Dissimilar
Materials with Stress Sigularity(Case of Bonded Dissimilar Materials
at Constant Bonding Condition), Modeling
and Simulation based
Engineering,
Vol.2, pp.1353/1358, Tech science press(1998.10).
- S.Nagasawa,Y.Fukuzawa,A.Kouda,H.Takahashi,M.Tateno,H.Sakuta:
Effects of Interface Structure
on Strength of Joined Dissimilar
Materials, Modeling and
Simulation based Engineering, Vol.2,
pp.1329/1334, Tech science press(1998.10).
- S.Nagasawa, Y.Fukuzawa, H.Takahashi, T.Yamada, H.Sakuta,
M.Tateno:
Analysis of cooling effects on
residual stress distribution of joined
clyindrical dissimilar materials, DVS Joining Ceramics, Glass and
Metal, 184, pp.120/122 (1997.5).
- H.Takahashi, Y.Fukuzawa, S.Nagasawa, M.Tateno, H.Sakuta:
The Effect of Non-uniform
Thermal Fields on Residual Stress in
Joined Cylindrical Dissimilar Materials, The Chinese Journal of
Mechanics, Vol.12, No.3, pp.401/408, (1996.9).
- Y.Fukuzawa, S.Nagasawa, H.Takahashi, H.Sakuta, M.Tateno,
and Y.Kuboyama: ESTIMATION OF TENSILE STRENGTH OF JOINED
CYLINDRICAL DISSIMILAR MATERIALS, Interface Science and Materials
Interconnection, Proceedings of the 8th Japan Institute of Metals
International Symposium, pp.463/466, TOYAMA, Japan
(1996.7).
- 立野 昌義, 福澤 康, 永澤 茂, 高橋治道, 佐久田博司 :
任意の材料定数の組合せにおける TiB2-Ni 接合体の界面形状選択に関する
検討, 溶接学会論文集, 14-1, pp.144-148, (1996.2).
- 立野 昌義, 福澤 康, 永澤 茂, 高橋治道, 佐久田博司 :
接合温度一定条件における TiB2-Ni 接合体の界面形状選択に関する
検討, 溶接学会論文集, 14-1, pp.137-143, (1996.2).
- Fukuzawa,Y., Nagasawa,S., Takahashi,H., Sakuta,H., Tateno.M.,
Yamada,M.: Effect of Interlayer Structure on Ceramic-Metal Joining
Strength, Proc. of IUMRS-International Conference in Asia '94,
pp.801-806, (1995).
- Tateno.M., Fukuzawa,Y., Nagasawa,S., Sakuta,H., Yasutomi, Y.:
Effect of Interface Shapes on Residual Stress (Suitable Bonding
Condition of
TiB2-Ni Joint), Transaction of Material Research Society,
16B, pp.1101-1104, Elsevier, (1994).
- 立野 昌義, 福澤 康, 永澤 茂, 高橋治道, 佐久田博司, 安富 義幸 :
応力特異性指数に基づく異材接合体強度の簡易評価, 日本機械学会論文集 A 編,
60-577, pp.18-24, (1994).
- TATENO,M., FUKUZAWA,Y., NAGASAWA,S., SAKUTA,H. : Reduction of
Residual Stress on Bonding Interface for Dissimilar Materials, {\it
ACerS} Annual Meeting and Exposition, Structural Ceramics Joining II,
San Francisco, USA, 187-195, 1993.
- 立野 昌義, 福沢 康, 永澤 茂, 佐久田 博司, 小島 陽] : 丸棒異種材 料接合体の残留応力解析に関する検討,
日本機械学会論文集 A 編, 59-564, 148-154, 1993.
- 立野 昌義, 福沢 康, 永澤 茂, 佐久田 博司, 安富 義幸, 小島 陽 : 異材 接合界面端部近傍の留応力低減に関する検討,
日本機械学会論文集 A 編, 59-558, 150-156, 1993.
- 栗田 政則, 藤田 真, 永澤 茂, 高橋 治道 : 異種材料接合界面の三次元 応力解析, 日本機械学会論文集 A 編,
58-555, 149-154, 1992.
- 福沢 康, 永澤 茂, 小島 陽, 佐久田 博司, 矢久保 和重 : TiB2-Ni 拡散接合体
の残留応力分布に及ぼす界面形状の影響, 日本金属学会誌, 56-7, 842-848,
(1992).