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Volume 17 (1991)
- Issue 6 Pages 223-
- Issue 5 Pages 179-
- Issue 4 Pages 133-
- Issue 3 Pages 89-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 17, Issue 6
Displaying 1-6 of 6 articles from this issue
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Hiroshi SUGISHIMA1991 Volume 17 Issue 6 Pages 223-228
Published: November 15, 1991
Released on J-STAGE: August 11, 2009
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Kanji KASHIHARA1991 Volume 17 Issue 6 Pages 229-234
Published: November 15, 1991
Released on J-STAGE: August 11, 2009
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N. HARAKI, T, NAKAO, K. TSUDA, H. HOJO1991 Volume 17 Issue 6 Pages 235-242
Published: November 15, 1991
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSSand erosion tests were performed on the resin matrix and the composites reinforced with glass chopped strand mat. The experimental apparatus used was the sand blasting type erosion tester. Crashed glass beads of 350 pm in average diameter were used as impingement particles. Glass fiber contents of composites were changed from 20 to 40 wt%. Experimental results showed the damage of the composites was controlled by a brittle mode damage and this behavior was emphasized with an increase of glass fiber contents. The characteristic results were recognized in the effect of attack angle on the erosion rates. At higher angles of attack, the erosion rates were larger with increasing of glass fiber contents. But at lower angles, the erosion rates were smaller with increasing of glass fiber contents. The maximum erosion rates of the FRP was obtained at higher angle of attack in comparison with the matrix resin. By SEM observation of the eroded surface, the different erosion damage form between higher angles of attack and lower angles of attack was recognized. The eroded surface of the matrix part in the FRP was the same as that of the resin specimen without glass fiber. On the other hand, the erosion behavior of glass fiber in the FRP was largely affected by angle of attack. At lower angle of attack, especially, the angle between impact direction of particle and the direction of fiber orientation gave the serious effect on the behavior of the erosion damage.View full abstractDownload PDF (7642K) -
H. HOJO, K. TSUDA, H. ISHIZUKA1991 Volume 17 Issue 6 Pages 243-248
Published: November 15, 1991
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThe estimation method of life of resin for FRP matrix based on flexural strength in a corrosive environment was studied. The corrosion tests of iso-phthalic unsaturated polyester resin and epoxy resin cured with various contents of phthalic anhydride and accelerator were carried out by immersing into KOH solution. These resin systems showed the surface-reaction type or corroded-layer forming type corrosion. The thickness of specimen or corroded-layer decreased with increase of immersion time linearly. The effects of concentration of KOH solution, composition of resin system, and temperature on the rate of decrease of the thickness were investigated. The estimation method of life was proposed for surface reaction type resin and corroded-layer forming type resin without pits or cracks, which was based on considering the effects of various factors on the corrosion rate. For corroded-layer forming type resin with pits of cracks, a method which estimates the life for safer side was obtained by assuming the corrosion rate equal to the growth rate of cracks.View full abstractDownload PDF (2927K) -
Satoshi SOMIYA, Goichi BEN, Nobuo TAKEDA, Hiroyuki HAMADA, Hisatoshi H ...1991 Volume 17 Issue 6 Pages 249-263
Published: November 15, 1991
Released on J-STAGE: August 11, 2009
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Eiichi YASUDA1991 Volume 17 Issue 6 Pages 264-265
Published: November 15, 1991
Released on J-STAGE: August 11, 2009
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