• 한국염색가공학회지
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• 제12권3호
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• pp.159-165
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• 2000

This study surveys the fabric mechanical properties according to the weaving design & finishing conditions of wool fabrics for quality control in the process. For this purpose, 8 kinds of Twill groups and 3 kinds of Plain groups weave fabrics, totally 428 woven fabrics are prepared with change of the yarn count, density and finishing method. Fabric thickness, bending rigidity, extensibility, shear rigidity, formability of the fabrics were measured and discussed with weaving design & finishing conditions.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2000년도 추계학술발표대회 논문집
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• pp.9-12
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• 2000

This paper deals with the torsional buckling behavior of plain weave GFRP composite cylindrical shells having comparatively small length-to-diameter ratio. Boundary conditions corresponding to clamped ends and simply supported ends are considered. Torsional buckling loads and circumferential mode numbers according to the variation of shell length-to-radius ratio are conformed. To verify the availability of the theoretical results, comparison with the theoretical and experimental results are made.

• 복식문화연구
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• 제9권5호
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• pp.759-769
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• 2001

The principal purpose of this study is focused on the fabrics used in Kaya period by investigating the imprinted fabrics on the remains of the old tomb of Dohang-ri and Jeesan-dong which were built around the late 4th century to the late 6th century. Most of the remains are plain weaved, however there is one remain that 4-end complex gauze with patterned, and the other is weaved with geometrical pattern which were plain weave with 2 · 1 twill and 3 · 1 twill. The imprinted fabrics that had twists had S twists only. Of all the fabrics that were examined, the most loose one had the density of 8 × 6/cm, the most fine fabric had the weft density of 91.8 strands/cm and the warp density cannot be counted. It is No. 416 of Doharg-ri tomb that has the highest ratio of density as 3.15. All the fabrics observed by SEM and Polarizing Microscope are hemp.

• 패션비즈니스
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• 제10권6호
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• pp.9-15
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• 2006

Colors of textile products or fashionable clothing play one of the most important roles. From the point of visual cues, the realism of an image is the result of a good interaction of local light scattering or transmittance model applied. A 3-dimensional CAD software was used to construct a solid plain fabric model. In order to simulate a union fabric with different warp and filling colors, rendering was performed on the fabric model. It was demonstrated that the iridescent effect, pearl effect, or superficial color change effect of the union fabric during wearer's movement could be explained using the fabric models at inclined fabric positions during viewer's observation.

• 복식
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• 제58권10호
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• pp.164-172
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• 2008

Soochonri tombs are assumed to be of the Baekje Kingdom in the early 5th century. We have examined 12 artifacts and 24 textiles in the four tombs. Along with hemp textiles, silk and embroidery threads were found In the Soochonri tombs. Within the hemp textiles both hemp and ramie were made using s-twist threads and the thread count distribution is calculated to be $8.5{\sim}15.5/cm^2$. Taffeta, one of the silk, can be categorized in to four types. First, the plain woven silk was made with warp and weft of the same thickness. The rates of thread count are also similar. Secondly the warp and weft are of the same thickness but has more spaces between threads. Third, the type of warp and weft is different in thickness, the thicker thread woven in the same direction. Lastly, a textile was woven with spaces the same as the width of the reed mark in every two warps. There were five compound weave found. Among them one was made with non-twisted thread for warp and s-twist thread for weft. One plain braiding with apparent spaces between threads were found. All three of the twining were made with wefts thicker than warps, barely showing the warps as a result. Textiles of the Soochonri tombs are the oldest of the Baekje Kingdom studied by far and therefore important artifacts of the Baekje Kingdom. These textiles are similar to those found in the King Muryeong's Tomb and tombs of Gaya and Shilla.

• 한국세라믹학회지
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• 제45권9호
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• pp.561-566
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• 2008

Carbon fiber fabric-silicon carbide composites were fabricated by liquid silicon infiltration (LSI) process. The porous two-dimensional carbon fiber fabric performs were prepared by 13 plies of 2D-plain-weave fabric in a three laminating method, [0/90], [${\pm}45$], [$0/90/{\pm}45$] lay-up, respectively. Before laminating, a thin pyrolytic carbon (PyC) layer deposited on the surface of 2D-plain weave fabric sheets as interfacial layer with $C_3H_8$ and $N_2$ gas at $900^{\circ}C$. A densification of the preforms for $C_f-Si-SiC$ matrix composite was achieved according to the LSI process at $1650^{\circ}C$ for 30 min. in vacuum atmosphere. The bending strength of the each composite were measured and the microstructural consideration was performed by a FE-SEM.

• 한국항공우주학회지
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• 제33권11호
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• pp.24-32
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• 2005

본 연구의 목표는 X-band에서 하중지지가 가능한 전자파 흡수 구조(RAS)를 제작하는 것이다. 본 연구에서는 하중을 지지할 수 있도록 비강성비강도가 우수한 유리섬유/에폭시 평직 복합재료에 손실을 일으킬 수 있는 MWNT를 첨가한 재료를 제작하였으며, 미세구조의 관찰과 유전율 측정을 통해 흡수 재료로의 적합성을 확인하였다. 유전자 알고리즘과 다층형 RAS의 전자파 반사/투과 이론을 적용하여 그 복합재료로 이루어진 RAS에 대한 최적설계를 수행하였다. RAS의 제작을 통해 복합재료의 층당 두께가 층수와 MWNT의 함량에 따라 변함을 확인하였다. 이를 고려한 제작 공정을 제안하고 적용하여 설계된 RAS를 제작하였고, 그것의 반사손실의 예측치와 실험치가 잘 일치함을 확인하였다.

• 대한기계학회논문집A
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• 제34권4호
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• pp.481-486
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• 2010

Carbon Fiber Reinforced Plastic(CFRP) 복합재료는 높은 비강성 및 우수한 화학적 특성 등으로 인하여 여러분야에서 점점 사용이 증가하고 있다. 대부분의 CFRP 복합재료는 여러 부품들의 조립을 통해 제작된다. 이러한 독립된 부품들은 볼트, 핀 등과 같은 기계적인 방법을 통해 체결된다. 볼트나 핀에 의한 hole은 구조내에서 노치로 작용하여 부품의 강도저하의 원인이 된다. 본 논문에서는 홀의 크기와 시험편 폭이 노치재의 파괴강도에 끼치는 영향을 평가하여 hole을 포함하고 있는 평직 CFRP 복합재료의 정하중 파괴 강도를 실험적으로 평가하였다. 이를 위하여 본 논문에서는 홀 크기와 시험편 폭에 따른 점응력 조건의 특성길이를 평가하였으며, 특성길이와 노치재의 파괴강도의 관계를 확인하였다. 이를 이용하여 노치재의 정하중 파괴기준을 재정의하였다.

• 패션비즈니스
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• 제23권3호
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• pp.67-84
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• 2019

Since the early 2000s, various fashion design products that use 3D printing technology have constantly been introduced to the fashion industry. However, given the nature of 3D printing technology, the flexible characteristics of material of textile fabrics is yet to be achieved. The aim of this study is to develop the optimal design conditions for production of flexible and elastic 3D printing fabric structure based on plain weave, which is the basic structure in fabric weaving using SLS 3D printing technology. As a the result this study aims to utilize appropriate design conditions as basic data for future study of flexible fashion product design such as textile material. Weaving structural design using 3D printing is based on the basic plain weave, and the warp & weft thickness of 4mm, 3mm, 2mm, 1.5mm, 1mm, and 0.7mm as expressed in Rhino 6.0 CAD software program for making a 3D model of size $1800mm{\times}180mm$ each. The completed 3D digital design work was then applied to the EOS SLS Machine through Maker ware, a program for 3D printer output, using polyamide 12 material which has a rigid durability strength, and the final results obtained through bending flexibility tests. In conclusion, when designing the fabric structure design in 3D printing using SLS method through application of polyamide 12 material, the thickness of 1 mm presented the optimal condition in order to design a durable digital textile structure with flexibility and elasticity of the 3D printing result.

• Composites Research
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• 제19권1호
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• pp.36-42
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• 2006

본 논문에서는 다중벽 탄소나노튜브가 첨가된 평직 유리섬유/에폭시 복합재료를 제작하여 전자기적 특성을 고찰하였다. 제작된 복합재료의 미세구조를 관찰하여 재료 내에 MWNT가 유리섬유 얀들의 계면과 모재과잉영역에 주로 분포되어 있음을 관찰하였다. 유전율은 X-band (8.2-12.4 GHz) 주파수 영역에서 측정되었으며, MWNT의 무게비가 증가할수록 증가하며 주파수에 대해서는 거의 일정하게 유지됨을 알 수 있었다 측정된 유전율을 이용하여 두께에 따른 탄소나노튜브가 첨가된 복합재료로 이루어진 전자파 흡수 구조의 반사손실 특성을 살펴보았으며, 제작된 복합재료를 이용하여 10dB 흡수 대역이 X-band전역이며 두께는 3.3mm인 흡수체를 구현할 수 있음을 확인하였다.