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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal DOI :
The Korean Society for Composite Materials
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Volume & Issues
Volume 23, Issue 6 - Dec 2010
Volume 23, Issue 5 - Oct 2010
Volume 23, Issue 4 - Aug 2010
Volume 23, Issue 3 - Jun 2010
Volume 23, Issue 2 - Apr 2010
Volume 23, Issue 1 - Feb 2010
Selecting the target year
Finite element analysis on bio-mechanical behavior of composite bone plate for healing femur fracture considering contact conditions
Kim, Suk-Hun ; Chang, Seung-Hwan ;
Composites Research, volume 23, issue 1, 2010, Pages 1~7
DOI : 10.7234/kscm.2010.23.1.001
In this paper, finite element analyses for estimating the behavior of fractured femur just after the operation were carried out by using ABAQUS 6.71. A stainless steel bone plate and composite bone plates with various stacking angles were considered to find out the effect of bone plate properties on bone fracture healing. In order to simulate the actual state, contact conditions between the plate and bone and fractured bones were imposed on the finite element models and the whole analysis was divided by two steps; screw fastening step and load bearing step. The stress and strain distributions at the fracture site for the cases of the stainless steel and composite bone plates were analyzed and compared with. From the analyses it was found that the composite bone plate had potential advantages for effective bone fractures healing relieving stress shielding effect.
Impact Behavior of Fiber/Metal Laminates (FMLs) under Low Velocity
Shi, Yu ; Kim, Seung-Hyun ; Kim, Byung-Sun ; Song, Jong-Il ;
Composites Research, volume 23, issue 1, 2010, Pages 8~16
DOI : 10.7234/kscm.2010.23.1.008
The Fiber/Metal Laminates (FMLs) have been developed as a new composite material for aerospace application to reduce weight and improve damage tolerance. In this study, firstly FMLs were manufactured and the tensile test was performed to investigate the mechanical properties of FMLs. Furthermore, impact behavior of the low velocity on FMLs which consisted of different types of aluminum or fiber/epoxy layers was tested by the drop weight impact tester based on the different impact energy conditions. The load-time and energy-time curves were employed to evaluate the impact performance of different specimens. Moreover, finite element analysis (FEA) was also performed to simulate the tensile test and impact behavior of FMLs under the same conditions with the tests and good agreements have been obtained between the FEA predictions and experimental results.
Effect of Magnetic Force on the Compressive and Dynamic Properties of Magnetorheological Elastomers
Ryu, Sang-Ryeoul ; Lee, Dong-Joo ; Lee, Jong-Hang ;
Composites Research, volume 23, issue 1, 2010, Pages 17~22
DOI : 10.7234/kscm.2010.23.1.017
The compressive and dynamic properties of magnetorheological elastomers were investigated as functions of magnetizable particle volume fraction, alignment of the embedded particle and magnetic force. The specimens consisted of pure and filled silicons with randomly dispersed, longitudinal and transverse aligned magnetizable particle chains. To align the embedded particles in the elastomer, the cross-linking of the elastomer composites took place in a magnetic field. The compression and dynamic tests in the absence and the presence of different magnetic forces were carried out. The modulus and loss factor of the elastomer composites increase with increasing volume fraction at the same magnetic force. The case of longitudinal alignment shows a high modulus and loss factor when compared to the case of transverse alignment or random dispersion.
A Study on Size/Scale Effects in the Failure of Specially Orthotropic Slab Bridges
Han, Bong-Koo ; Kim, Duck-Hyun ;
Composites Research, volume 23, issue 1, 2010, Pages 23~30
DOI : 10.7234/kscm.2010.23.1.023
Most of the bridge systems, including the girders, cross-beams, and concrete decks behave as specially orthotropic plates. In general, the analytical solution for such complex system is very difficult to obtain. In this paper presented, a design method of slab bridge of simple supported made by composite materials. For the design of bridge made by the composite materials, cross-section was used the form-core shape because of this shape is economical and profitable, and for output of the stress value used finite difference method. In this paper, the rate of tensile strength reduction due to increased size was considered. Strength-failure analysis procedure, using the reduced tensile strength, was presented. And also numerical study was made for these cases.
Improved Electrical Conductivity of CFRP by Conductive Nano-Particles Coating for lightning Strike Protection
Ha, Min-Seok ; Kwon, Oh-Yang ; Choi, Heung-Soap ;
Composites Research, volume 23, issue 1, 2010, Pages 31~36
DOI : 10.7234/kscm.2010.23.1.031
The improvement of electrical conductivity of carbon-fiber reinforced plastics (CFRP) has been investigated by silver nano-particles coating for the purpose of lightning strike protection. Silver nano-particles in colloid were sprayed on the surface of carbon fibers, which were then impregnated by epoxy resin to form a CFRP specimen. Electrical resistance was measured by contact resistance meter which utilize the principles of the AC 4-terminal method. Electrical resistance value was then converted to electrical conductivity. The coated silver nano-particles on the carbon fibers were verified by SEM and EDS. The electrical conductivity was increased by three times of the ordinary CFRP.
Structural Behavior of Bolted Lap-Joint Connection in the Pultruded FRP Structural Members
Lee, Young-Geun ; Shin, Kwang-Yeoul ; Joo, Hyung-Joong ; Nam, Jeong-Hun ; Yoon, Soon-Jong ;
Composites Research, volume 23, issue 1, 2010, Pages 37~43
DOI : 10.7234/kscm.2010.23.1.037
In this paper, we present the result of an experimental investigation pertaining to the structural behavior of bolted lap-joint connection of pultruded fiber reinforced plastic structural shapes. In the experimental investigation, in order to find the mechanical property of the material, tension and shear tests on the pultruded structural composite specimen are conducted prior to the investigation on the structural behavior of bolted lap-joint connection of the member. Based on the result, number of bolts, type of placement and location of bolt are determined to be a test variable. Three different types of experimental specimens are prepared. Tensile load is applied through the center of the specimen with lap-joint connection and the structural behavior and failure mode of the test specimens with respect to the tensile load increment are investigated. As a result, it is found that most of the failure mode at the lap-joint connection is shear failure mode. Consequently, it is also found that the data obtained through this experimental program could be used for the structure connection design as a basis.
Effects of salt water environment on the mechanical behavior of composites
Moon, Jin-Bum ; Kim, Soo-Hyun ; Kim, Chun-Gon ;
Composites Research, volume 23, issue 1, 2010, Pages 44~50
DOI : 10.7234/kscm.2010.23.1.044
In this paper, two different experiments, namely, salt water spray and salt water immersion, were performed to reproduce the contact of composites with the seawater for three kinds of woven fabric composite material systems which would be used for the WIG(wing in ground effect)craft. After aging 140 days in the salt water environment, material properties of carbon/epoxy and glass/epoxy composite such as tensile, compressive and shear stiffness and strength, and inter-laminar shear strength (ILSS) were measured. By comparing baseline material properties with degraded ones, the effects of the salt water environment on the composite mechanical properties were evaluated. From the experiments, it was confirmed that the difference in aging conditions had very small influence on composite properties. And it was found that tensile strength of carbon/epoxy composites showed little degradation, but much more degradation was observed in glass/epoxy composites. And large degradations on matrix dominant properties were observed. The salt water could damage the fiber-matrix interface, matrix properties and the glass fiber.
자기흐름유체(Magnetorheological Fluid)의 응용
Kim, Jong-Hui ; Kim, Geon-U ; Kim, Cheol-Gi ; Yu, Yo-Han ;
Composites Research, volume 23, issue 1, 2010, Pages 51~53
DOI : 10.7234/kscm.2010.23.1.051