著者

村上 惇 松下 裕臣 吉識 忠継 新保 正樹

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.34, no.384, pp.1099-1104, 1985-09-15 (Released:2009-06-03)

参考文献数

27

被引用文献数

2 2

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The morphology of phase-separation and the mechanical properties of amine cured rubber-modified epoxy resins were investigated.The results of the dynamic mechanical properties and the microscopic observations indicated that the epoxy-rich matrix phase was plasticized by the dissolved rubber and the rubber-rich domains were dispersed homogeneously in the epoxy-rich matrix.The rubber-modification of epoxy resins enhanced the fracture toughness against crack initiation and caused the crack arrest. The size of the plastic-deformed region at the crack tip was correlated well with the fracture toughness against crack initiation according to Dugdal's equation.From the fatigue crack propagation (FCP) tests at a low frequency it has been shown that the presence of rubber domains introduces the interfacial debonding between the domain and the matrix as the result of stress response, which promotes the FCP at the low stress intensity factor range.

著者

中野 詔彦 長谷川 澄子

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.42, no.480, pp.1032-1038, 1993-09-15 (Released:2009-06-03)

参考文献数

3

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The structures of giant fullerenes have been considered from the topological view point. As the fullerenes are formed of the pentagonal rings and hexagonal rings, Euler's theorem in the topology shows that 12 pentagonal rings are neccessary though the number of hexagonal ones is arbitrary for the formation of the closed polyhedron. This restraint predicts that symmetric giant fullerenes have the following shapes: the icosahedral-shaped, the tetrahedral-shaped, the pentagonal prism-shaped and the hexagonal prism-shaped ones. We have classified the icosahedral-shaped and the tetrahedral-shaped ones into three systems, respectively, and the pentagonal prism-shaped and the hexagonal prism-shaped ones into two systems, respectively, thus totaling ten systems. We have formulated the equations for calculating the number of atoms n in the giant fullerenes Cn. The results indicate that the forming of the round-shaped giant fullerenes requires the sets of heptagonal and pentagonal rings while keeping (the number of pentagonal rings)-(the number of heptagonal rings)=12.

著者

堤 壽一

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.20, no.218, pp.1152-1158, 1971-11-15 (Released:2009-06-03)

参考文献数

24

著者

中村 孝

出版者

社団法人日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.55, no.4, pp.445-446, 2006-04-15

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筆者は2004年10月から2005年7月まで,カナダのアルバータ大学機械工学科で在外研究を行う機会を得た.アルバータ大学はアルバータ州の州都エドモントンにある学生数3万人以上の総合大学であり,世界45ヵ国170校と提携を結んでいる.特に,機械工学科は筆者の所属する北海道大学機械系専攻と実質的な交流を続けている.筆者は約10ヶ月の間,Advanced Composite Materials Engineering (ACME) Groupに在籍し,Fernand Ellyin教授とZihui Xia助教授の指導の下でCFRPの環境強度に関する研究に携わった.研究内容については,論文等で紹介する機会もあると思うので,本稿では印象に残った身の回りの出来事を綴ってみたい.

著者

武田 邦彦

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.54, no.1, pp.104-111, 2005 (Released:2006-04-07)

参考文献数

12

著者

八代 浩二

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.68, no.4, pp.311, 2019-04-15 (Released:2019-04-20)

著者

西田 真之 八代 浩二

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.68, no.4, pp.380, 2019-04-15 (Released:2019-04-20)

著者

日比野 誠 今井 恒雄 城戸 正久 松下 博

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.54, no.10, pp.1087-1093, 2005 (Released:2006-04-07)

参考文献数

11

被引用文献数

2

著者

大濱 嘉彦 山口 茂

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.54, no.9, pp.971-978, 2005 (Released:2006-04-07)

参考文献数

26

著者

日下 一也

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.68, no.1, pp.81, 2019-01-15 (Released:2019-01-20)

参考文献数

3

著者

工藤 清勝 岡本 剛

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.17, no.179, pp.656-666, 1968-08-15 (Released:2009-06-03)

参考文献数

76

被引用文献数

2 1

著者

作井 誠太

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.18, no.190, pp.579-589, 1969-07-15 (Released:2009-06-03)

参考文献数

35

被引用文献数

1 3

著者

尾方 成信

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.49, no.3, pp.250-256, 2000-03-15 (Released:2009-06-03)

参考文献数

26

著者

青山 栄一 廣垣 俊樹 井上 久弘 野辺 弘道 郡嶋 宗久 北原 洋爾 片山 傳生

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.45, no.5, pp.577-581, 1996-05-15 (Released:2009-06-03)

参考文献数

7

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This paper describes the hole quality of small diameter drilling in GFRP using two kinds of laser beam machines in order to invent a no-traditional process of drilling in printed wiring board (PWB) as no contact machining. Drilling is performed by a CO2 laser machine and a YAG laser machines and the drilling conditions (assisting gas, output power, irradiation time, wavelength) are varied in order to assess the effect on the hole quality, especially the damage appearing at the hole wall drilled by laser machines. From these results, it is shown that the application of CO2 laser beam is effective on smaller diameter drilling in GFRP. It is important to decrease the total laser irradiation time in order to improve the hole quality.

著者

名取 礼二

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.13, no.128, pp.298-302, 1964-05-15 (Released:2009-06-03)

参考文献数

8

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The three components of skeletal muscle fiber, that is, sarcolemma, myofibril and sarcoplasma, different among themselves in their viscoelastic properties, have been separately studied.A myofibril bundle with properties of living muscle fiber can be separated by removing the sarcolemma of a muscle fiber in liquid paraffine, the smallest sample obtained by this method being about 1μ in diameter.Myofilaments as thin as 100Å in diameter can be separated by spreading out the myofibril bundle on metal net in air.The breaking length of a muscle fiber is 180-200% of its resting length, its breaking stress being 0.5∼5×106 dynes/cm2.The ratio of initial elongation to creep by load is a function of the load itself, for example, the maximum of the ratio is 3 to 2, the load and the breaking stress being 1.5×105 and 5×105dynes/cm2 respectively.The thermal expansion coefficient (α) of a muscle fiber of M. sartorius of Bufo is -10-4∼-10-5, its absolute value being inversely proportional to its birefringence.The length-tension diagram of a myofibril bundle coincides with that of intact muscle fiber, as far as the extension is less than 140% of its resting length.Concerning the time course of creep by loading and the thermo-elasticity, the myofibril bundle and the single muscle fiber resemble each other.The striated pattern with periodical intervals of about 100Å can be electronmicroscopically observed in the separated myofilament in its resting state.This periodical intervals increase to 170% of that in its resting state, when the myofilament is extended.The viscoelasticity of muscle has been discussed on the basis of the results mentioned above and the relevant references.

著者

保田 昌樹 日根 文男

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.31, no.340, pp.22-27, 1982-01-15 (Released:2009-06-03)

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Formation of corrosion tubercles on carbon steels were carried out in the aerated neutral solutions composed of boric-borate buffer (0.01M) and water with some suspensions of CaCO3 and CaSiO3 powders at pH=7.5-8.8. The solutions containing NO2-, CrO42-, or HS- of less than 50ppm in concentration were also examined. The solution temperature was at 60-65°C.The tubercles thus formed were classfied into three types: the active passive, the general corrosion, and the sulfide initiative, depending on the potential. The active passive-type tubercles formed at the potential range where the second peak of current appeard on the anodic polarization curve. On the other hand, the general corrosion-type tubercles grew at the potentials where general corrosion of steels tested appeard. In the latter case, calcium scale deposited on the steel surface, but the corrosion spots formed partially at which the scale deposition was insufficient.The mechanism for the sulfide initiative-type tubercles is unclear whereas it forms certainly in aerated and neutral solutions containing HS- at the potential range -0.50 to -0.55V vs. Ag/AgCl.

著者

菊池 潮美

出版者

社団法人日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.45, no.5, 1996-05-15

著者

日根 文男 保田 昌樹

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.20, no.211, pp.523-526, 1971-04-15 (Released:2009-06-03)

参考文献数

9

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The disturbance of electric field in the vicinity of the test electrode by the Luggin-Haber capillary was studied mathematically and empirically with the current interrupter. The equipotential line near the capillary tip was predicted, and considerable deformation was observed over about one third of the diameter of the capillary. The capillary located close to the surface of the test electrode disturbed the uniform current distribution, and the build-up curve of the oscilloscope trace was deformed. Its critical distance was about twice the diameter of the capillary.

著者

中川 隆夫

出版者

社団法人日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.28, no.304, pp.2-8, 1979-01-15

著者

中川 隆夫

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.28, no.304, pp.2-8, 1979-01-15 (Released:2009-06-03)

参考文献数

38