벨로우즈 를 이용 한 반복 하중 부과 장치 의 개발 및 성능 시험 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 903 PDF KSCI 
 나노 구체 의 자기 조립 성질 과 표면장력 을 이용 한 나노 유체 필터 및 나노 포어 마이크 로 믹서 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 910 PDF KSCI 
 자동차 용 냉각기 고무호스 의 노화 거동 과 미소 경도 분석 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 915 PDF KSCI 
 Rubber hoses for automobile radiators are apt to be degraded and thus failed due to the influence of contacting stresses of air and coolant liquid under thermal and mechanical loadings . The aging behaviors of the skin part of the hoses due to thermo - oxidative and electro - chemical stresses were experimentally analyzed . Through the thermo - oxidative aging test , it was shown that the surface hardness IRHD ( International Rubber Hardness Degrees ) of the rubber increased with a considerable reduction of failure strain as the aging time and temperature increased . On account of the penetration of coolant liquid into the skin part influenced by the electro - chemical degradation ( ECD ) test the weight of the rubber hose increased , whereas their failure strain and IRHD hardness decreased . The hardness of the hose in the side of the negative pole was the most deteriorated at the test site of the hose skin just below the coolant surface . 
 반응 표면 법 을 이용 한 5 축 임펠러 정삭 가공 의 최적 화 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 924 PDF KSCI 
 An impeller is a important part of turbo - machinery . It has a set of twisted surfaces because it consists of many blades . Five - axis machining is required to produce a impeller because of interference between tool and workpiece . It can obtain good surface integrity and high productivity . This paper proposes finish cutting method for machining impeller with 5 - axis machining center and optimization of cutting condition by response surface method . Firstly , cutting methods are selected by consideration of operation characteristics . Secondly , response factors are determined as cutting time and cutting error for prediction of productivity . Experiments are projected by central composite design with axis point . Thirdly , regression linear models are estimated as single surface in the leading edge and as dual surface in the hub surface cutting . Finally , cutting conditions are optimized . 
 휠 로더 용 폐회로 형 부하 감응 유압 제어 시스템 의 특성 해석 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 934 PDF KSCI 
 In this study , the characteristics of the load - sensitive hydraulic control system for closed center type of a wheel loader were analyzed using developed analysis program based on Amesim tool . From the parametric analysis , the effects of each factor were revealed . Through the simulation with varying parameters , the system parameter effects on the controllable region and the pump pressure and load pressure variations were studied . The results were compared with the experimental ones . The results and discussions of the present paper could aid in the design of a load - sensitive hydraulic control system for closed center type . 
 굽힘 하중 을 받 는 준 카고 메 트러스 샌드위치 판재 의 파손 선도 와 최 적설계 변수 의 도출 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 943 PDF KSCI 
 A new metallic sandwich panel with a quasi - Kagome truss core subjected to bending load has been analyzed . First , equations of the failure loads corresponding to the eight failure modes are presented . Then , non - dimensional forms of the equations are derived as functions of three geometric variables , one material parameter ( yield strain ) , one load index and one weight index . Failure maps are presented for a given weight index . By using the dimensionless forms of equations as the design constraints , two kinds of optimization are performed . One is based on the weight , that is , the objective function , namely , the dimensionless load is to be maximized for a given weight . Another is based on the load , that is , the dimensionless weight is to be minimized for a given load . The results of the two optimization processes are found to agree each other . The optimized geometric variables are derived as a function of given weights or failure loads . The performance of the quasi - Kagome truss as the core of a sandwich panel is evaluated by comparison with those of honeycomb cored and octet truss cored panels . 
 마이크 로 압입 시험 기법 의 응용 을 통한 탄성체 고분자 소재 의 역학 적 특성 화 및 계면 접합 에너지 평가 기법 연구 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 951 PDF KSCI 
 In this study , the Johnson - Kendall - Roberts ( JKR ) theory was combined with the instrumented indentation technique ( IIT ) to evaluate work of adhesion and modulus of elastomeric polymer . Indentation test was used to obtain the load - displacement data for contacts between Tungsten Carbide indenter and elastomeric polymer . And the JKR contact model , contrived to take viscoelastic effects of polymer into account , was applied to compensate the contact area and the elastic modulus which Hertzian contact model would underestimate and overestimate , respectively . Besides , we could obtain the thermodynamic work of adhesion by considering the surface energy in this contact model . In order to define the relation between JKR contact area and applied load without optical measuring of contact area , we used the relation between applied load and contact stiffness by examining the correlation between JKR contact area and stiffness through dimensional analysis with 14 kinds of elastomeric polymer . From this work , it could be demonstrated that the interfacial work of adhesion and elastic modulus of compliant polymer can be obtained from a simple instrumented indentation testing without area measurement , and provided as the main algorithm of compliant polymer characterization . 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 960 PDF KSCI 
 압 전 재료 내 의 균열 에 대한 그린 함수 
 최성렬 967 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 967 PDF KSCI 
 A general form solution is considered for a piezoelectric material containing impermeable cracks subjected to a combined mechanical and in - plane electrical loading . The analysis is based upon the Hilbert problem formulation . Using this solution , typically for a central crack in transverse isotropic piezoelectric material , a closed form solution is obtained , where one concentrated mechanical and electrical load is subjected to the crack surface . This problem could be used as a Green ' s function to generate the solutions of other problems with the same geometry but of different loading conditions . 
 다이어프램 구동 형 글로브 밸브 의 진단장 비 개발 
 https : / / doi . org / 10 . 3795 / KSME - A . 2007 . 31 . 9 . 975 PDF KSCI 
 Air - operated valve is one of principal valves that are used to control fluid flow in nuclear power plants . A periodic diagnosis for the safety of power plants is necessary . But there are many difficulties such as economic loss caused by income of high cost devices and a matter hard to deal with users . In this study , we developed the diagnostic system that users of power plants are easy to handle . The diagnostic system is composed of database module , diagnosis test module and analysis module .