All issues
Volume 29 (2003)
- Issue 6 Pages 205-
- Issue 5 Pages 165-
- Issue 4 Pages 123-
- Issue 3 Pages 81-
- Issue 2 Pages 41-
- Issue 1 Pages 1-
Volume 29, Issue 4
Displaying 1-5 of 5 articles from this issue
- |<
- <
- 1
- >
- >|
-
Toshiyuki IKOMA, Junzo TANAKA2003 Volume 29 Issue 4 Pages 123-128
Published: July 15, 2003
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (5223K) -
Tsutomu TSUCHIYA2003 Volume 29 Issue 4 Pages 129-135
Published: July 15, 2003
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSDownload PDF (5546K) -
Creep Rupture Model with Interfacial Debonding around Broken FibersJun KOYANAGI, Hiroyuki KAWADA, Genya KIYOTA2003 Volume 29 Issue 4 Pages 136-142
Published: July 15, 2003
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSThis paper describes a creep rupture model considering the interfacial debonding in broken fibers in unidirectional polymer matrix composites reinforced by glass fibers. Interfacial debonding was accompanied with fiber breaks under the tensile load, depended on the fiber stress at the simultaneous fiber breaks. The interfacial debonding length, fiber strength and an interfacial shear stress were investigated by the fragmentation test. A vinylester/glass fiber interface's properties were investigated by the fragmentation test. Subsequently, the debonding length and a stress recovery length were quantitatively studied and it was found out that the relation between the strength and the length of fiber was linear. The debonding length was calculated by a measure of the distance between the fiber breaking faces. The interfacial debonding length was taken into the Curtin's fracture model. Moreover, the creep test of the unidirectional composites, it was vinylester resin matrix reinforced by glass fibers, was performed to investigate the creep constants. Then, the prediction in the use above parameters of the creep rupture time was discussed.View full abstractDownload PDF (1777K) -
Toshio OGASAWARA, Takashi ISHIKAWA, Rikio YOKOTA2003 Volume 29 Issue 4 Pages 143-149
Published: July 15, 2003
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSMulti-walled carbon nanotubes (MW-CNTs) were dispersed throughout a thermosetting polyimide “Triple A PI” (TriA-PI). TriA-PI is a newly developed phenylethynyl terminated polyimide, and exhibits excellent mechanical properties and processability with high glass transition temperature (Tg>300°C). The resulting composites containing 3.3, 7.7, 14.3 wt% MW-CNT exhibited relatively good dispersion. Tensile tests on the composites showed an increase in the elastic modulus and the yield strength, and decrease in the failure strain. Dynamic mechanical analysis (DMA) showed an increase in the glass transition temperature with incorporation of the MW-CNTs. The experimental result suggested that the MW-CNTs are acting as macroscopic crosslinks, and are further immobilizing the polyimide chains at elevated temperature.View full abstractDownload PDF (7166K) -
Hiroshi SAITO, Hiroyuki HAMADA2003 Volume 29 Issue 4 Pages 150-155
Published: July 15, 2003
Released on J-STAGE: August 11, 2009
JOURNAL FREE ACCESSIn actual application fields to utilize the composite materials for an energy absorption component, it is necessary to take into account the effects of jointing with the other components. Therefore the effects of bolted jointing between composite pipe and steel column on the energy absorption property of composite pipe were evaluated in this study. As the result, composite pipe jointing by eight M8 bolts to steel column exhibited progressive crushing, and energy absorption property of composite pipe bolted joint was almost equal to that of the elemental composite pipe itself. In order to reveal the condition to be exhibited progressive crushing in composite pipe bolted joint, the compression strength of composite and the shear strength of bolt were focused, and two condition equations were proposed. These condition equations were evaluated by using to the experimental results, and it was found that the experimental results were well consistent with the simulation by the proposed equations. Accordingly, it is possible to apply these equations to design of the composite pipes for actual energy abosorber components jointed to the other components by bolts.View full abstractDownload PDF (4198K)
- |<
- <
- 1
- >
- >|