http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유연전자회로를 위한 폴리머 기판/세라믹 아일랜드를 사용한 획기적 유연성 확보기술
윤주일(Juil Yoon),선정윤(Jeong-Yun Sun),오규환(Kyu-Hwan Oh),Joost J.Vlaask,Zhigang Suo 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
For a flexible electronic device integrating inorganic materials on a polymer substrate, the polymer can deform substantially, but the inorganic materials usually fracture at small strains. In this work, we show a novel approach to make such a device highly stretchable. A polyimide substrate is first coated with a thin layer of an elastomer, on top of which SiNx islands are fabricated. When the substrate is stretched to a large strain, the SiNx islands remain intact. Our simple model illustrates that the very small stiffness of the interlayer is the key to significantly reduce strains in the islands and therefore the stretchability of polymersupported ceramic island arrays has been improved remarkably.
영역 분할법을 이용한 깊은 홈을 가진 임의 형상 오목 멤브레인의 고유치 해석
강상욱(Kang, S.W.),윤주일(Yoon, J.I.) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.10
A sub-domain method for free vibration analysis of arbitrarily shaped, concave membranes with a deep groove is proposed in the paper. The proposed method divides the concave membrane of interest into two convex regions. The vibration displacement(approximate solution) of each convex region is assumed by linearly superposing plane waves generated at edges of the region. A sub-system matrix for each convex region is extracted by applying a provisional boundary condition to the approximate solution. Finally, a system matrix, which of the determinant gives eigenvalues of the concave membrane, is made by considering the fixed boundary condition(displacement zero condition) at edges and the compatibility condition(the condition of continuity in displacement and slope) at the interface between the two regions. Case studies show that the proposed method is valid and accurate when the eigenvalues by the proposed are compared to those by NDIF method, FEM, or the exact method.