• Title/Summary/Keyword: Minitab

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Optimization of Silver Nanoparticles Synthesis through Design-of-Experiment Method (실험계획법을 활용한 은 나노 입자의 합성 및 최적화)

  • Lim, Jae Hong;Kang, Kyung Yeon;Im, Badro;Lee, Jae Sung
    • Korean Chemical Engineering Research
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    • v.46 no.4
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    • pp.756-763
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    • 2008
  • The aim of this work was to obtain uniform and well-dispersed spherical silver nanoparticles using statistical design-of-experiment methods. We performed the experiments using 2 k fractional factorial designs with respect to key factors of a general chemical reduction method. The nanoparticles prepared were characterized by SEM, TEM and UV-visible absorbance for particle size, distribution, aggregation and anisotropy. The data obtained were analyzed and optimized using a statistical software, Minitab. The design-of-experiment methods using quantified data enabled us to determine key factors and appreciate interactions between factors. The measured properties of nanoparticles were dominated not only by individual one or two main factors but also by interactions between factors. The appropriate combination of the factors produced small, narrow-distributed and non-aggregated silver nanoparticles of about 30 nm with approximately 10% standard deviation.

Optimization of Peel Adhesion of Acrylic Pressure Sensitive Adhesive using Design of Experiments (실험계획법을 이용한 아크릴 점착제의 점착력 최적화)

  • Lee, Young Sang;Ha, Jin Kuk;Lee, Euy Soo
    • Journal of Adhesion and Interface
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    • v.9 no.1
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    • pp.22-27
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    • 2008
  • The effect of functional monomers on the acrylic pressure sensitive adhesive (PSA) property was measured. Design of experiments in order to optimal peel adhesion was applied and commercial program (MINITAB) was used. Analysis was used to mixture design (special cubic model) in response surface methodology. Optimal monomer compositions was construed by 2-EHA (0.8861), EA (0.0639), MAA (0.03) and AAm (0.02). The estimated regression equation was as follows : $$y=54.8816x_1+80.7067x_2-44.4700x_3-99.0288x_1x_2+60.7706x_1x_3-441.030x_2x_3+974.341x_1x_2x_3$$.

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Failure Analysis and Accelerated Life Test of MoxW1-xSi2 Haters Fabricated by SHS process (SHS 공정으로 제조된 MoxW1-xSi2 발열체의 가속수명시험과 고장분석)

  • Lee, Dong-Won;Lee, Sang-Hun;Kim, Yong-Nam;Lee, Heesoo;Lee, Sung-Chul;Koo, Sang-Mo;Oh, Jong-Min
    • Journal of IKEEE
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    • v.21 no.3
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    • pp.252-255
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    • 2017
  • $Mo_xW_{1-x}Si_2$ heaters were fabricated by self-propagating high-temperature synthesis (SHS) process and post sintering process. To validate the reliability of the $Mo_xW_{1-x}Si_2$ heaters, the accelerated life test (ALT) was conducted, and then lifetime to $Mo_xW_{1-x}Si_2$ heaters was estimated by using Minitab programs. Also, the failure analysis of $Mo_xW_{1-x}Si_2$ heaters after ALT was performed through electrical and structural properties. As the results, it was confirmed that the dominant failure mode of $Mo_xW_{1-x}Si_2$ heaters is the crack formation in heaters and the delamination of protective $SiO_2$ layers.

Optimization of Process Parameters of Incremental Sheet Forming of Al3004 Sheet Using Genetic Algorithm-BP Neural Network (유전 알고리즘-BP신경망을 이용한 Al3004 판재 점진성형 공정변수에 대한 최적화 연구)

  • Yang, Sen;Kim, Young-Suk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.1
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    • pp.560-567
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    • 2020
  • Incremental Sheet Forming (ISF) is a unique sheet-forming technique. The process is a die-less sheet metal manufacturing process for rapid prototyping and small batch production. In the forming process, the critical parameters affecting the formability of sheet materials are the tool diameter, step depth, feed rate, spindle speed, etc. This study examined the effects of these parameters on the formability in the forming of the varying wall angle conical frustum model for a pure Al3004 sheet with 1mm in thickness. Using Minitab software based on Back Propagation Neural Network (BPNN) and Genetic Algorithm (GA), a second order mathematical prediction model was established to predict and optimize the wall angle. The results showed that the maximum forming angle was 87.071° and the best combination of these parameters to give the best performance of the experiment is as follows: tool diameter of 6mm, spindle speed of 180rpm, step depth of 0.4mm, and feed rate of 772mm/min.

Investigation for Optimization of Ultrasonic Soil-Washing Process for Remediation of Diesel Contaminated Soil (유류오염토양의 복원을 위한 초음파 토양세척 공정의 최적화에 대한 연구)

  • Park, Beom-Guk;Son, Young-Gyu;Hwang, An-Na;Khim, Jee-Hyeong
    • Journal of the Korean Society of Hazard Mitigation
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    • v.11 no.1
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    • pp.101-105
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    • 2011
  • Determination of ultrasonic frequency and experimental design approach to optimization of ultrasonic soil-washing process for remediation of diesel contaminated soil were investigated. Ultrasonic frequencies of 35, 72, and 100 kHz were used for determination of optimal frequency. $MINITAB^{(R)}$ program was used for experimental design of optimal washing condition. The optimal ultrasonic frequency was 35 kHz. Even though the number of cavitation bubble is little, however cavitation bubbles involving larger energy compared with high frequency was generated. Therefore, the removal efficiency at low frequency was higher than at high frequency. However the input energy has to be considered when the process is applied. The statistical tests from a factorial experiment shows that the application of ultrasound and mechanical mixing are the most important factor for design of an ultrasonic soil washing process. The lab-scale experiments are required to get the optimal condition of ultrasound and mechanical mixing for application of ultrasonic soil washing process.

An Alternative Simplified Approach in Solving for the Inelastic Buckling Strengths of Singly Symmetric Non-Compact Stepped I-Beams (일축대칭 비조밀 스텝 I형보의 비탄성 좌굴강도 산정을 위한 단순방법)

  • Alolod, Shane;Park, Jong Sup
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.39 no.1
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    • pp.123-134
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    • 2019
  • This paper proposed a new design equation for the inelastic lateral torsional buckling (LTB) of singly symmetric stepped I-beams with non-compact flange sections. The proposed equation was generated using a finite element program, ABAQUS, and a statistical program, MINITAB. The parameters used were the stepped beams parameters; ${\alpha}$, ${\beta}$, and ${\gamma}$ and the length-to-height ratio ($L_b/h$) of the beam. The proposed equation was further validated by means of experimental test, where beams were subjected to four-point bending and supported by roller and lateral braces near the end supports. In addition, finite element models were simulated using the same parameters used in the experimental test to verify the results of the test conducted. It was proved that LTB capacity calculated from the proposed equation is accurate and conservative in comparison with the yielded values from the FEM and actual test, making it a reliable and safe approach in calculating the buckling capacities of singly symmetric stepped beams with non-compact flange sections.

Field Data Collection and Failure Analysis for Durability Improvement (내구수명향상을 위한 서비스 데이터 수집 및 고장률 분석)

  • Kim, Jong-Hwan;Jung, Won
    • Journal of Korea Society of Industrial Information Systems
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    • v.16 no.5
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    • pp.107-114
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    • 2011
  • The purpose of this paper is to develop a reliability estimation process of agricultural machinery components using field failure data. Estimating the durability is a time-consuming in the product development process. Using the field data of tractor, failures for major parts are investigated and databases are developed. Accelerated life test using the stress analysis could improve Weibull B10 considerably. This estimation process is useful for preparing the design input and planning the durability target.

Optimal Water Lubrication Condition for an Axle Shaft Cold Forging (Axle Shaft 냉간 단조를 위한 최적 수계윤활조건)

  • Park, Ji-Won;Lee, Jong-Soo;Choi, Young-Jun;Kim, Jong-Ho;Lee, Seok-Soon
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.1
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    • pp.84-90
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    • 2010
  • The cold forging Process applies surface lubricant coating in order to smooth the friction during the cold forging process. Currently, most of the lubrication processes apply the zinc phosphate coating, which requires 11 steps and disposes sludge. But the water based lubrication process, which has been newly developed, takes 3 steps only and does not cause sludge. In this study, we present the optimal condition of water based lubrication for the cold forging of axle shaft by an experimental design method. Experimental results with minitab shall be able to predict the optimum water based lubricating conditions for the cold forging processes.

Failure Analysis and Production of Reliability Parameter for Solenoid Actuator (솔레노이드 액츄에이터의 고장분석 및 신뢰성 파라메터 산출)

  • Sung, Baek-Ju;Lee, Eun-Woong;Lee, Jae-Gyu
    • Proceedings of the KIEE Conference
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    • 2006.04b
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    • pp.130-132
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    • 2006
  • For the reliability assessment of solenoid actuator, firstly, we analyzed the cause of major failures and the effect of each failure modes through FMEA and FTA, and decided the main test items through 2-stage QFD. And then, as a measure of life of solenoid actuator, TypeII censored five data were collected from and operation test which was performed as the life test of solenoid actuator. In this paper, we present the reliability parameters of solenoid actuator like shape parameter, scale parameter, etc., which they are produced by MINITAB analysis and marking of Weibull probability paper using the measure of life, and also present the 6 kinds of detailed failure mode analysis.

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A study on Analysis of Contact erosion at a Magnetic Contactor with the Use of Regression Analysis (회귀분석을 이용한 전자접촉기의 접점소모 분석에 대한 고찰)

  • Klm, Myoung-Seok;Ryu, Haeng-Su;Han, Gyu-Hwan
    • Proceedings of the KIEE Conference
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    • 2003.10b
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    • pp.116-118
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    • 2003
  • This paper describes a Accelerated Life Test (ALT) with the electrical contact erosion suitable to the evaluations of high-reliability and durability devices such as magnetic contactor. Recently, an electrical devices company was interested in accelerated life test (ALT), the product liability (PL) and the short-term testing model of electrical life test (ELT). In order to estimate a model for testing fee and period, need to the statistical analysis method with the acceleration factor(AF). Usually customer/manufacturer regard their device failure to the over-current or heavy duty condition, while devices view shape of contact erosion owing to operational duty problem. In this paper, additional method of evaluation estimated the operated cycles by weight of contact erosion with a used of regression analysis by MINITAB.

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