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Yuji Kozono, Yoshihisa Miyamoto
Article type: Article
Pages
365-366
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Ryu KOBAYASHI, Go MURASAWA, Masahisa TAKASHI
Article type: Article
Pages
367-368
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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This paper describes the first step approach to the final goal, that is the quantitative evaluation of viscoelastic strain energy loss and heat generation in vehicle tire made of laminated rubber like materials under compression contact load. The procedure adopted to solve a plane strain problem of laminated viscoelastic structure under compression contact is as follows; 1) The experiments on tri-layer laminated block models made of viscoelastic materials are conducted. Viscoelastic stress analysis under quasi-static load is performed by the white light photoelastic technique in 2D cases, and in 3D by the white light scattered photo-elastic technique. 2) An experiment system is developed for the purpose of stress evaluation of the laminated viscoelastic structure tire model under rolling contact load. 3) A laminated tire model under rolling contact is investigated utilizing the same technique mentioned above.
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Yukio SUGAWARA, Takahiro SHIBUYA
Article type: Article
Pages
369-370
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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The stress analysis of steel subjected to induction heating is done using FEM. During induction heating, the generation of heat occurs depending on the strength of hysteresis loss and the eddy current loss, both is considerd in the numerical calculation. As the appling this heating method to surface quenching of steel, the result is effectively used to determin the hardening depth.
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Takehiro YAMANE, Satoru TAKATA, Zhong wei JIANG
Article type: Article
Pages
371-372
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Toshikazu SHIBUYA, Terutaka KAI, Kikuo KISHIMOTO, Hirotsugu INOUE, Ken ...
Article type: Article
Pages
373-374
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Yasuyuki KATO, Tomohiro Tabata
Article type: Article
Pages
375-376
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Yasuyuki KATO, Tomoyuki OUCHI
Article type: Article
Pages
377-378
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Tadashi KIKUCHI, Takatomo WATAMORI, Hirakazu KASUYA
Article type: Article
Pages
379-380
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Because of their high specific strength and stiffness, fiber-reinforced plastics have been used as structural members in various fields, and hence analysis of thin laminated structures is important. Postbuckling behaviors of laminated plates under axial compression have been discussed by many researchers. However, little research has been perfiormed on the postbuckling behavior of laminated curved plates. In this paper, the stability condition of CFRP angle-ply laminated curved plates under biaxial compression which are simply supported along four edges is determined, using the Galerkin's method. The postbuckling behavior is proven analytically, and the effects of various factors, such as dimension of curved plate, biaxial compressive ratio, deflection pattern and average axial shortening, are clarified.
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Kiyomitsu Sugizaki, Tsutomu EZUMI
Article type: Article
Pages
381-382
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Xiao qun WANG, Takeji ABE, Naoya TADA, Ichiro SHIMIZU
Article type: Article
Pages
383-384
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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YUUJI FUNAMOTO, AKIHIRO WATANABE, KENJI GOMI, KENSUKE ICHINOSE
Article type: Article
Pages
385-386
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Shi wei MA, Tetsuya SASAKI, Etsuji YOSHIHISA, Takashi HONDA
Article type: Article
Pages
387-388
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Ultrasonic nondestructive tests with a high frequency contact transducer were carried out to thermally degraded Cr-Mo steel. Frequency dependent ultrasonic characteristics were obtained by means of Morlet wavelet transform. It is shown that, with the increase of grain size, the ultrasonic attenuation and its change with frequency gradually increased within a significant frequency band. Velocity was found hardly to change with thermal degradation. The effectiveness of time-frequency analysis for the quantitative evaluation of thermal damage is clarified.
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Takeshi TOMOMITSU, Tsutomu EZUMI
Article type: Article
Pages
389-390
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Hideaki SATO, Tsutomu EZUMI
Article type: Article
Pages
391-392
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Article type: Appendix
Pages
App20-
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Tetsuyuki HIROE, Kazuo FUJIWARA, Takahiko NAGANO
Article type: Article
Pages
393-394
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Shinichi Komazaki, Noriyuki Hiromoto, Toshihei Misawa, Tatsuya Takahas ...
Article type: Article
Pages
395-396
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Tetsuyuki HIROE, Kazuhito FUJIWARA, Takenori MICHISHITA, Erhard KREMPL
Article type: Article
Pages
397-398
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Fumiko KAWASHIMA, Toshihide IGARI, Yorikata MIZOKAMI
Article type: Article
Pages
399-400
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Terutaka FUJIOKA
Article type: Article
Pages
401-402
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Shoji KAMIYA, Satoru OKAMOTO, Fumito MORIKAWA, Masumi SAKA, Hiroyuki A ...
Article type: Article
Pages
403-404
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Satoshi Kai, Hirotsugu Ogi, Tetsu Ichitsubo, Masahiko Hirao, Kazuki Ta ...
Article type: Article
Pages
405-406
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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M. Okazaki, I. Ikada, K. Hirano
Article type: Article
Pages
407-408
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Kenichi OHGUCHI, Katsuhiko SASAKI
Article type: Article
Pages
409-410
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Naoya TADA, Ryuichi OHTANI, Atsuhide WADA, Takafumi NAKANO
Article type: Article
Pages
411-412
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Katsuyuki TOKIMASA
Article type: Article
Pages
413-414
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Fully reversed creep-fatigue tests were conducted on 316LC austenitic stainless steel thin-walled tubular specimens at 1023K in air. Strain waveforms adopted were so called PP, CP and CC type ones. Thin-walled tubular specimens were tested under two kinds of loading conditions, that is, cyclic axial push-pull loading and cyclic torsion. Outer diameter, wall thickness and gage length of the tubular specimen are 22mm, 1mm and 25mm, respectively. As the results, the effect of stress state on the partitioned inelastic strainrange versus life relations was determined based on the tubular specimen data under both cyclic axial push-pull loading and cyclic torsion. It is shown that the effect of stress state on Δε_<cp>-N<cp> and Δε_<cc>-N_<cc> relations as well as on Δε_<pp>-N_<pp> relation can be quantified by using the multiaxiality factor.
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Naoto KASAHARA, Hideki KAMIDE, Minoru IGARASHI, Hiromi HOSOGAI, Hideki ...
Article type: Article
Pages
415-416
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Hiroki GOTOU, Yasuharu CHUMAN
Article type: Article
Pages
417-418
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Toshihiko FURUE, Masaru SHIMIZU, Yukio IMAIZUMI, Morihiko MAEDA, Toshi ...
Article type: Article
Pages
419-420
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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There exists such a risk that a steam turbine will be broken down by damages on its nozzle and blade caused by the collision with and erosion by steam oxidized scales flied from boiler tubing. The objectives of this investigation are to verify the potential use of AE technique as a means for monitoring the present state of a turbine in operation and to detect the abnormality occurring in its early stage, and to develop the system for preventing serious troubles in turbine performance by use of AE technique.
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Takuichi IMANAKA, Takeshi YOSHIMURA, Kazuhiro MUKAI
Article type: Article
Pages
421-422
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Of the material degradation occurred in aged refineries and petrochemical equipments, one is hydrogen attack. For the investigation of initial stage of hydrogen attack for low carbon steel, the monitoring system was designed. By use of this system the in-situ measurement of temperature, and hydrogen pressure dependence of sound wave propagation time and the activity of acoustic emission were performed under the condition of high temperature of 773∿823K and high pressure of 14.7∿29.4MPa of hydrogen. It has been clarified that the changes in propagation time appeared after an incubation time depending on test conditions and acoustic emission also began to appear around the end of incubation periods. These results were discussed in relation to the computer simulation for the methane bubble growth using a coupled theory of dislocation creep and grain boundary diffusion.
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Toshihiro OHTANI, Hirotsugu OGI, Masahiko HIRAO
Article type: Article
Pages
423-424
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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We studied microstructure evolution caused by creep in 2.25%Cr-1%Mo steel using ultrasonic attenuation. The material was exposed to the temperature of 923K at various stresses. We used electromagnetic acoustic resonance (EMAR) to measure attenuation. EMAR is a contactless acoustic-resonance method and is free from energy losses associated with contact transducer, resulting in the intrinsic attenuation solids. We use an axial-shear-wave EMAT, which transmits and receives SH wave propagating in the circumferential direction of a cylindrical specimen. The attenuation exhibits much larger sensitivity to the damage accumulation than the velocity. We explain the attenuation evolution with the microstructure change, especially, through the dislocation damping, which is supported by TEM observations. The technique has a potential to assess the damage advance and predict the creep life of metals
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Article type: Appendix
Pages
App21-
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Atsushi HATORI, Itsuo SAKURAMOTO, Yousuke HANASAKI, Shinya KAWAI, Tosh ...
Article type: Article
Pages
425-426
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Yoichi NAKAMOTO, Osamu KUWAZURU, Nobuhiro YOSHIKAWA
Article type: Article
Pages
427-428
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Seiji NISHIUMI, Taiji ADACHI, Kenichi TSUBOTA, Yoshihiro TOMITA
Article type: Article
Pages
429-430
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Koji MORI, Koji HATTORI, Takashi Suzuki, Yasuaki Nakagawa, Hiroshi Kur ...
Article type: Article
Pages
431-432
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Autogenous osteochondral graft is a clinically effective treatment for articular cartilage defect. It is reported that the mechanical properties of the grafted cartilage change after treatment. Articular cartilage is required various mechanical functions such as the load support. Therefore, it is important that the change of mechanical properties of a grafted cartilage is quantitatively investigated. The ultrasonic method was used to quantify the quantify the biomechanical change. In this report, we focused on the effect of the operation .The aggregate modulus, surface roughness and thickness of cartilage before and after the operation were compared. In results, mechanical properties were not affected by the operation were compared. In results, mechanical properties were not affected by the operation. The results suggest that the follow-up after the operation have to be given attention.
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Shuichi WAKAYAMA, Teppei KAWAKAMI, Satoshi KOBAYASHI, Mamoru AIZAWA, A ...
Article type: Article
Pages
433-434
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Atsushi SUGINO, Akiko MORI, Koichi KURAMOTO, Toshiki MIYAZAKI, Chikara ...
Article type: Article
Pages
435-436
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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PMMA-based bone cement is commercially used for anchoring implants, such as artificial hip joints, with bone. However, it has a major problem on prosthesis loosening due to coverage by fibrous tissues after long-term implantation. A novel design of bone cement exhibiting bone-bonding ability i. e. bioactivity is desired. In order for artificial materials to bond directly to bone, formation of an apatite layer on the artificial surface is prerequisite. This apatite formation is triggered both by release of calcium ions (Ca^<2+>) from the materials, and by catalytic effect on induction of apatite nucleation by silanol (Si-OH) groups on their surfaces. The present authors have recently developed bioactive PMMA-based bone cement through modification with γ-methacryloxypropyltrimethoxysilane (MPS) and various kinds of calcium salts. In this study, effects of chemical modification on its mechanical properties were examined in a simulated body fluid (SBF). Four point bending strength of modified cements after soaking in SBF increased in the order : Ca(OH)_2 < Ca(CH_3COO)_2 < Commercial bone cement < No modification (Reference).
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Syunich Kawano, Itsuo Sakuramoto, Akiko Mori, Kazuya Nagata, Naohide T ...
Article type: Article
Pages
437-438
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Qiang YU, Makoto KAMIYA, Masaki SHIRATORI, Kazuo HIRAKAWA, Ryouhei TAK ...
Article type: Article
Pages
439-440
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Hiromichi KUNIMOTO, Taiji ADACHI, Yoshihiro TOMITA
Article type: Article
Pages
441-442
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Koji Ohnishi, [in Japanese], MATSUDA, Hajime Kishi, Hidenobu MIKI, No ...
Article type: Article
Pages
443-444
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Satoshi MATSUDA, Koji ONISHI, Makoto OGAWA, Yoshimi NISHIMURA, Hajime ...
Article type: Article
Pages
445-446
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Article type: Appendix
Pages
App22-
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Itaru MUROYA, Kiminobu HOJO, Takeharu NAGASAKI, Tomonori NOMURA, Masah ...
Article type: Article
Pages
447-448
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Fracture toughness of stainless steel casting (duplex stainless steel) is reduced under the condition about 300℃ by the thermal aging. For the flaw evaluation on thermal aged duplex stainless steel pipes, Fracture Assessment Curve (FAC) of R6 Option2 method is calculated using the stress-strain curve and J-resistance curve of thermal aged duplex stainless steel. To evaluate the fracture load on thermal aged duplex stainless steel in simple method, corrective factor is prepared in order to convert limit load based on net section criteria to fracture load based on R6 method.
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Shigeru YAMAMOTO, Hideaki TAGA
Article type: Article
Pages
449-450
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Fumitaka Moriwaki, Kensuke Ichinose
Article type: Article
Pages
451-452
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Sumio TANAKA, Etsuro IRIE
Article type: Article
Pages
453-454
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Kazuya MORI, Andrea SPAGNOLI, Gorou KONDO, Yukitaka MURAKAMI, Ippei TO ...
Article type: Article
Pages
455-456
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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Michio SHIMADA, Tokuharu YOSHII, Takeshi NARUSE
Article type: Article
Pages
457-458
Published: October 10, 2002
Released on J-STAGE: August 01, 2017
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To improve hammering test on a hull inspection, thickness estimation method by an impulse hammer was developed with numerical expression of impact behavior of a ball on an elastic plate. Impulse load signals of an impulse hammer striking steel plates were collected and the relationship between plate thickness and characteristic values of the signals were examined. Impact, peak load and minmax ratio (-minimum derivative/maximum derivative) of the signal show significant dependency on plate thickness. In case of the impact, the reproducibility was better than the others. The accuracy of thickness estimation which was examined by multi-value regression estimates with 1st-4th powered impact values was found to be within ±0.5mm in thickness range of 6mm-19mm.
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