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RISS 인기검색어
- 검색키워드
- 저자 : Jian-Guang Zhai (검색결과 2 건)
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Studying of Pre-Forming Method Applying on Refrigerator
Jian-Guang Zhai,Jong-Rae Cho,Jung-Il Song 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.4
In this studying, we developed a named Pre-Forming method in order to decrease thermal bowing deformation of refrigerator. Finite element method (FEM) was applied to calculate thermal deformation of the specified refrigerator model. The sequential thermal-mechanical coupling analysis method was used in ANSYS V12.0. The finite element (FE) model of convex, concave and convex-concave pattern were analyzed comparing to the refrigerator model without any special structure on the side wall of inner case. After calculating, temperature distribution conditions are almost the same as each other of pre-forming models. The pre-forming models obviously decrease thermal deformation by means of creating pre-deformation which would make inner case keep ideal shape that we anticipate.
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압입방법을 이용한 플라즈마 코팅재의 기계적 특성평가 및 유한요소 해석
Yan-Rong Wang,Balakrishnan G,Jian-guang Zhai,Abdul Wasy,Jung Il Song 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.5-3
Efforts have been made to deposit alumina-40 wt.% titania (AT-40) coatings AISI 1045 steel by Plasma Enhanced Chemical Vapor Deposition (PECVD) technique. The structure, morphology and chemical composition fracture mechanisms of the coatings was studied by XRD, SEM and EDAX, The coating contain alumina and titania. The alumina has γ-Al₂O₃, θ-Al₂O₃ and α-Al₂O₃ and titania comprise of rutile and anatase phases. Vickers-indentation was used to determine the hardness and fracture toughness of coated materials. The hardness values varied with the indentation load. Experimental results indicate that Vickers hardness varied from 13.3 to 17.0 GPa. The fracture toughness obtained from Vickers indentation was in the order of 1.77-2.07 MPa· m<SUP>1/2</SUP>. In addition the elastic-plastic behavior was evaluated by finite element (FE) numerical analysis. FE analysis results gave insight in the fracture mechanism of the ceramic films.
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