Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal Basic Information
Journal DOI :
The Korean Society for Composite Materials
Editor in Chief :
Volume & Issues
Volume 18, Issue 6 - Dec 2005
Volume 18, Issue 5 - Oct 2005
Volume 18, Issue 4 - Aug 2005
Volume 18, Issue 3 - Jun 2005
Volume 18, Issue 2 - Apr 2005
Volume 18, Issue 1 - Feb 2005
Selecting the target year
Manufacture and Mechanical Properties of Carbon Nanofiber Reinforced Hybrid Composites
Chung Sang-Su ; Park Ji-Sang ; Kim Tae-Wook ; Kong Jin-Woo ;
Composites Research, volume 18, issue 3, 2005, Pages 1~6
Carbon nanofiber exhibits superior and of ien unique characteristics of mechanical, electrical, chemical and thermal properties. Despite of the excellent properties of carbon nanofiber, the properties of carbon nanofiber filled polymer composites were not increased largely. The reason is that it is still difficult to ensure the uniform dispersion of carbon nanofiber in a polymer matrix. In this study, for improvement of the mechanical properties of composites, carbon nanofiber reinforced hybrid composites was investigated. For the dispersion of carbon nanofiber. solution blending method using ultrasonic was used. Dispersion of carbon nanoifiber was observed by scanning electron microscope (SEH). Mechanical properties were measured by universal testing machine(UTM).
A Study on the Low Velocity Impact Response of Woven Fabric Composites for the Hybrid Composite Train Bodyshell
Lee Jae-Hean ; Cheong Seong-Kyun ; Kim Jung-Seok ;
Composites Research, volume 18, issue 3, 2005, Pages 7~13
This paper presents a study on the low velocity impact response of the woven fabric laminates for the hybrid composite bodyshell of a tilting railway vehicle. In this study, the low velocity impact tests for the three laminates with size of
were conducted at three impact energy levels of 2.4J, 2.7J and 4.2J. Based on the tests, the impact force, the absorbed energy and the damaged area were investigated according to the different energy levels and the stacking sequences. The damage area was evaluated by the visual inspection and the C-scan device. The test results show that the absorbed energy of [fill]8 laminate is highest whereas (fill2/warp2)s is lowest. The [fill]8 laminate has the largest damage area because of the highest impact energy absorption.
A Study on the Simulation of Complex Permittivities of Carbon Black/Epoxy Composites at a High Frequency Band
Kim Tae-Wook ; Kim Chun-Gon ; Kim Jin-Bong ;
Composites Research, volume 18, issue 3, 2005, Pages 14~20
This paper presents a study on the permittivities of the carbon black/epoxy composite at microwave frequency. The measurements were performed at the frequency band of
. The experimental data show that the complex permittivities of composites depend strongly on the natures and concentrations of the carbon black dispersion. The frequency characteristics of dielectric constants and ac conductivities of composites show the good conformity with descriptions of the percolation theory, satisfying the general scaling relation. The measuring frequency band is over the critical frequency, below that the ac conductivities of composites are constant to the frequency. The values of dielectric constants and ac conductivities have consistent relationships with the carbon black concentration. The A new scheme, that is a branch of Lichtenecker-Rother formula, is proposed to obtain a mixing law to describe the complex permittivities of the composites as function frequency and concentration of carbon black.
Modeling the Heterogeneous Microstructures of Ti-MMCs in Consolidation Process
Lee Soo-Yeun ; Kim Tae-Won ;
Composites Research, volume 18, issue 3, 2005, Pages 21~30
Vacuum hot pressing has been used for the development of titanium metal matrix composites using foil-fiber-foil method. Heterogeneous microstructures prior to and following consolidation have been quantified, and the relations to densification behavior investigated. As shown by the results, dramatic variations of the microstructures including equiaxed
are obtained during the process according to the fiber distributions. The dependence of microstructures on the consolidation then has been explained in terms of the change in mechanisms such as grain growth and recrystallization that occur with changing levels of inhomogeneity of deformation. Further, micro-mechanics based constitutive model enabling the evolution of density over time together with the evolutions of microstructure to be predicted has been developed. The mode developed is then implemented into finite element scheme so that practical process simulation has been carried out.
Mechanical Interfacial Properties of Electrospun-based Poly(ethyleneoxide) Nanofibers/Epoxy Composites
Jeong Hyo-Jin ; Lee Jae-Rock ; Park Soo-Jin ;
Composites Research, volume 18, issue 3, 2005, Pages 31~37
In this work, poly(ethylene oxide) (PEO) nanofibers were fabricated by electrospinning to prepare the nanofibers-reinforced composites. And the PEO powders-impregnated composites were also prepared to compare the mechanical interfacial behaviors of the composites. Morphology and fiber diameter of PEO nanofibers were determined by SEM observation. Mechanical interfacial properties of the composites were investigated in fracture toughness
and interlaminar shea. strength (ILSS) tests. As a result, the fiber diameter was decreased with increasing the applied voltage. And optimum condition for the fiber formation was 15 kV, resulting from increasing of jet instability at high voltage. The PEO-based nanofibers-reinforced epoxy composites showed the improvements of both
and ILSS, compared to the composites impregnated with PEO powders. These results indicated that the nanofibers had higher specific surface area and larger aspect ratio than those of the powders, which played an important role in improving the mechanical interfacial properties of the composites.
Impact Performance of 3D Orthogonal Composites by Automated Tape Placement Process
Song S-W ; Lee C-H ; Um M-K ; Hwang B-S ; Byun J-H ;
Composites Research, volume 18, issue 3, 2005, Pages 38~46
In order to characterize the outstanding performance of three-dimensional (3D) composites, the low velocity impact test has been carried out. 3D fiber structures have been achieved by using the automated tape placement (ATP) process and a stitching method. Materials for the ATP and the stitching process were carbon/epoxy prepreg tapes and Kevlar fibers, respectively. Two-dimensional composites with the same stacking sequence as 3D counterparts have also been fabricated for the comparison of damage tolerance. For the assessment of damage after the impact loading, specimens were subjected to C-Scan nondestructive inspection. Compression after impact (CAI) tests were conducted to evaluate residual compressive strength. The damage area of 3D composites was greatly reduced
compared with that of 2D composites. Although the CAI strength did not show drastic improvement for 3D composites, the ratio of retained strength was
higher than 2D samples. The effect of stitching on the impact performance was negligible above the energy level of 35 Joules.
Experimental analysis of pultrusion process for phenolic foam composites
Lee WooIl ; Yun MyungSeok ;
Composites Research, volume 18, issue 3, 2005, Pages 47~52
Pultrusion process of phenolic foam composite is investigated. Phenolic foam composites provide heat and flame resistance with less weight. When made into foam, a variety of properties can be obtained with different bubble size and number density. In this study, effect of process variables on the foaming characteristics of phenolic resin composites during pultrusion process has been studied experimentally. The process variables considered are the heating temperature and the pulling speed as well as the mass fraction of blowing agent. Experiments were performed using a laboratory scale pultrusion apparatus. Optimal process condition was found by observing the micro-morphology.
철도차량 분야에서의 복합재 적용을 위한 성능 평가 기술
Composites Research, volume 18, issue 3, 2005, Pages 53~58
광섬유센서의 사회기반 구조물에의 활용
Composites Research, volume 18, issue 3, 2005, Pages 59~64