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Volume 28 (2002)
- Issue 6 Pages 215-
- Issue 5 Pages 171-
- Issue 4 Pages 129-
- Issue 3 Pages 87-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 28, Issue 5
Displaying 1-6 of 6 articles from this issue
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Joon-Hyung BYUN, Byung-Sun HWANG2002 Volume 28 Issue 5 Pages 171-175
Published: September 15, 2002
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (6294K) -
Hideaki MURAYAMA, Kazuro KAGEYAMA, Hiroshi NARUSE, Akiyoshi SHIMADA, K ...2002 Volume 28 Issue 5 Pages 176-188
Published: September 15, 2002
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe purpose of structural health monitoring (SHM) is to lead a structure to be safer at a lower cost. In SHM, it is important to evaluate the actual state of the structure. Recently, fiber-optic sensors have been developed actively, and one can measure nearly all of the physical measurands of interest by them. Since they also have excellent characteristics such as high sensitivity, immunity from electromagnetic interference, good mechanical characteristics and distributed configuration, they have been applied to “smart structures.” Capability of quasi or fully distributed sensing is especially the significant advantage compared to conventional sensors. We have applied the fiberoptic distributed sensors to SHM in the field and we developed the integrated systems with the fiberoptic sensors and CAD/CAE for two large composite structures. These systems could give us useful information on the structural state, such as deformation and temperature during/after manufacture.View full abstractDownload PDF (10910K) -
Kenjiro YAMAGISHI, Shintaro KITADE, Misao KONDO, Hideo MORITA, Shinya ...2002 Volume 28 Issue 5 Pages 189-195
Published: September 15, 2002
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThermoplastic composites have high impact resistance and are good material for the vane of jet engine that sometimes suffer bird strike damage. Matched-die press molding process is employed for the fabrication of the vane to meet its high precision requirement. The molding process, however, containes many parameters to be optimized, and several preliminary tests would be necessary to determine the condition. Utilizing the in-mold sensor can significantly reduce the number of test moldings. The procedure for controlling the molding process of CF/PEEK composite vane was established. A CF/PEEK stator vane model is made up with using two controlling dielectric sensors. The procedure includes AC (Alternate Current) conductivity to control the timing of pressurizing. The temperature distribution of the mold also controlled by AC conductivity. The vane model was successfully molded by the process. The density of the void in the vane model was reduced by controlling with the dielectric sensor.View full abstractDownload PDF (3674K) -
Tensile Tests of Carbon Fiber Composite Cables and Health Monitoring by Electrical Resistance MethodHiroyuki MOTOYAMA, Kosuke SHIGA, Kazumasa MORIYA, Toshiaki OHTA2002 Volume 28 Issue 5 Pages 196-203
Published: September 15, 2002
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSA simple tension test for CFRP 1×7 stranded cables have been conducted under both rotation-free and rotation-fixed conditions. The relationship between the tensile properties of CFRP cables and the end conditions of the specimen were investigated. It was found out that tensile strength of CFRP cable decreased according to the increase of the angle of untwist in these tests. The relationship between the resistance change of the fiber direction and the elongation of unidirectional carbon fiber composites has already been reported. In this tensile test, the resistance of the strand (core and side wires) of CFRP cable along the fiber direction and AE signal were measured and the propagation of damage of the CFRP was monitored and examined by the non-destructive method. From the test results, the relationship between load and resistance change and AE behavior was investigated until the CFRP cable failed. Data for damage evaluation of CFRP cable by the non-destructive method under tensile loading was obtained.View full abstractDownload PDF (4146K) -
Tomohiro YOKOZEKI, Takahira AOKI, Yoichi HAYASHI, Takashi ISHIKAWA2002 Volume 28 Issue 5 Pages 204-209
Published: September 15, 2002
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe damage behavior of transverse cracks in CFRP laminates without free-edges was experimentally investigated. Using laminated pipes with thick and thin 90-degree layers, static tensile tests were conducted with bonded loading fixtures. The transverse cracking behavior in pipes was inspected using ultrasonic C-scanning images. In parallel, tensile tests of coupon specimens of same layup as pipes were also carried out. It is shown that laminated pipes were less susceptible to the accumulation of transverse cracks than coupons with free-edges and the difference tends to be larger as 90-degree layers become thicker.View full abstractDownload PDF (3432K) -
[in Japanese], [in Japanese]2002 Volume 28 Issue 5 Pages 213
Published: September 15, 2002
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (122K)
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