• EDISON SW 활용 경진대회 논문집
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• 제4회(2015년)
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• pp.266-268
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• 2015

In this paper, we write about EDISON program. We study about where to use this program. We can use this program for FEA naturally. But we study that using this program in class. Many students can't understand many mechanics of materials' problem. They want to see image such as change of beam. It can help students to understand many problem. We can use ANSYS or Abaqus. But EDISON program is better for students because of it is freeware. In this paper, I write two problem. One is peak stress of basic beam, another is shearing stress flow of I-beam. On the basis of this, EDISON program will be widely used.

• EDISON SW 활용 경진대회 논문집
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• 제1회(2012년)
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• pp.101-104
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• 2012

본 논문에서는 충남대학교에서 설계하고 있는 인력비행기인 Volante의 주익 에어포일을 선정하기 위하여 교육 및 연구를 위한 CFD 해석 프로그램인 EDISON_CFD를 이용하여 후보군으로 있는 에어포일들의 경향성을 확인하고 성능이 좋은 에어포일을 선정하였다. 또한 CFD 프로그램으로 상용화된 Fluent와 비교하여 EDISON_CFD의 신뢰성을 확인하였다.

• EDISON SW 활용 경진대회 논문집
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• 제5회(2016년)
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• pp.477-480
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• 2016

Based on the Jansen mechanism theory, a walking robot is developed, which is able to overcome the given obstacles. Taking joint positions and leg directions as design parameters, the walking robot is analyzed. In order to analyze and optimize the leg motion, Edison program and Jansen mechanism optimization solver are used, respectively. It is found that Edison program is so effective to determine joint variables and position of leg direction. With the help of these programs, lots of trials or errors could be saved.

• EDISON SW 활용 경진대회 논문집
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• 제6회(2017년)
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• pp.270-281
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• 2017

본 논문에서는 헬리콥터 블레이드에서 발생하는 자이로스코픽 세차 진동에 대해 연구하고, 능동 제어기 설계를 통하여 진동 저감 시뮬레이션을 수행한다. 이를 위해, 헬리콥터의 전진 비행시 동역학적 응답을 외팔보 조건을 갖는 회전익의 해석이 가능한 EDISON의 기하학적 정밀 보 구조동역학 프로그램을 이용하여 구조 해석을 진행하고 이를 단순 공기력 모델과 연성하여 공탄성 해석을 수행하였다. 실시간 구조 응답을 구하기 위해 EDISON 프로그램 해석 결과를 비선형 수식으로 모델링하는 기법과 트림해석에는 Newton-Raphson 기법 등이 사용되었다.

• EDISON SW 활용 경진대회 논문집
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• 제4회(2015년)
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• pp.274-278
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• 2015

There are different kinds of aircrafts, such as conventional airplane, rotorcraft, fighter, and unmanned aerial vehicle. Their shape and feature are dependent upon their assigned mission. One of the fundamental analyses during the design of the aircraft is the structural analysis. The structural analysis becomes more complicated and needs more computations because of the on-going complex aircrafts' structure. In order for efficiency in the structural analysis, a simplified approach, such as equivalent beam or plate model, is preferred. However, it is not clear which analysis will be appropriate to analyze the realistic configuration, i.e., an equivalent beam or plate analysis for an aircraft wing. It is necessary to assess the boundary between the one-dimensional beam analysis and the two-dimensional plate theory for an accurate structural analysis. Thus, in this paper, the static structural analysis results obtained by EDISON solvers were compared with the three-dimesional results obtained from MSC NASTRAN. Before that, EDISON program was verified by comparing the results with those from MSC NASTRAN program and analytic solution.

• EDISON SW 활용 경진대회 논문집
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• 제5회(2016년)
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• pp.240-245
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• 2016

In this paper, stress contour plots depending on length, load, and diameter of the implant are presented. Depending on the condition and amount of cortical bone, process of implanting can be difficult and stress becomes important. Therefore deciding the right length and diameter of implant is critical. When analyzing stress in the implant, Von-mises yield criterion is often used; however, due to hardship of acquiring the actual material property of surrounding bones, simplified model of a implant was adapted in finite element analysis program of EDISON. The result acquired from EDISON program was then compared with results of different research papers.

• EDISON SW 활용 경진대회 논문집
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• 제6회(2017년)
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• pp.506-510
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• 2017

Based on the Jansen mechanism theory, a walking robot is developed, which is able to trace a line. In order to find the optimized legs, GL(Ground Length), GAC(Ground Angle Coefficient) and Grashof criteria are utilized in m.sketch program as well as EdisonDesign program. Many types of design are applied to sensors and controls, and the functionality is checked. Finally, a prototype line tracer robot is manufactured using aduino parts and smart boards. The prototype robot is test run to check the validity of the design, and modifications are applied to improve the performance according to each test result until the best design is achieved.

• EDISON SW 활용 경진대회 논문집
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• 제5회(2016년)
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• pp.209-216
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• 2016

Holes of rivets, bolts and nuts may cause stress concentration on the plates used in aircraft, ship and other structures. Excessive stress concentration may lead to severe breakage of the plates. Thus, accurate analysis of the stress concentration at the design stage will be important. In this paper, accuracy of EDISON program in stress concentration analysis was examined. By changing hole size on a narrow plate, the change of the stress concentration factor(K) was investigated. Additionally, the same experiment was conducted about series of holes on plate to investigate the interaction between adjacent holes. Then, these numerical results were compared with the analytic prediction. EDISON program showed very high accuracy about stress concentration, since the numerical results was correlated well with the analytic prediction.

• EDISON SW 활용 경진대회 논문집
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• 제4회(2015년)
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• pp.246-250
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• 2015

In this paper, Timoshenko and Euler-Bernoulli beam theories(EB-beam) are used, and Fast Fourier Transformation(FFT) analysis is then employed to extract their natural frequencies using both analytical approach and Co-rotational plane beam(CR-beam) EDISON program. EB-beam is used to analyze a spring-mass system with a single degree of freedom. Sinusoidal force with various frequencies and constant magnitude are applied to tip of each beam. After the oscillatory tip response is observed in EB-beam, it decreases and finally converges to the so-called 'steady-state.' The decreasing rate of the tip deflection with respect to time is reduced when the forcing frequency is increased. Although the tip deflection is found to be independent of the excitation frequency, it turns out that time to reach the steady state response is dependent on the forcing frequency.

• EDISON SW 활용 경진대회 논문집
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• 제4회(2015년)
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• pp.285-291
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• 2015

In this paper, a composite material analysis program based on the finite element method(FEM) is used. The purpose of this study was to verify whether the composite material analysis program which developed as part of a project of development of softwares and educational contents for structural vibration and composite material analysis that can calculate how similar the macroscopic mechanical behavior of the composite materials actually. Because composite materials are generally anisotropic, analysis of composite laminate is used for the constitutive equations of orthotropic material. For convenience, the unit is ommited in all calculations. To verify the accuracy of the finite element method based program, the deflection and stress distribution of the simply supported composite material laminated plate subjected to a uniform load distribution is compared with exact solution. Size and properties of the composite material laminate used for analysis are fixed variables, and by changing the number of elements and the total thickness of the laminate is compared with the exact solution to the resulting value, respectively.