• Title/Summary/Keyword: structural re-analysis

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Fashion Design Development and Type Analysis of Redesign Using Clothing Details (의복 디테일을 활용한 리디자인 유형 분석과 패션 디자인 개발)

  • Kim, So-Young;Yoon, Sook-Won
    • Journal of the Korea Fashion and Costume Design Association
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    • v.15 no.1
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    • pp.191-206
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    • 2013
  • Nowadays consumers have begun to have interest in eco-friendliness, and re-design is being highlighted as a fashion alternative for consumers with interest in ethical consumption. This study established the concept of re-design fashion as a way to practice eco-friendly design and analyzed various re-design fashions with four types. And it also analyzed decorative and structural details being often employed for re-design. This study intends to suggest new alternative fashion in order to develop re-design fashion design that can satisfy both eco-friendliness and practicality. The results of the research are as follows: First, according to the result of analyzing re-design fashion types, they can be divided into the types of developing new products through combination of decorative details, combination of structural details, development of new fabric through fabric reconstruction, and reconstruction to different products. Second, according to the result of examining the details that can be used to develop new re-design fashion products, pleats, shirring, tuck, peplum, or tab's decorative details and neck-line, collars, sleeves, cuffs, or pocket's structural details are utilized often. Third, total seven recycled clothes were used to design three works taking decorative and structural details. Through this, the study suggests re-design fashion products that can solve environmental pollution resulted from wastes of clothes.

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A multi-field CAE analysis for die turning injection application of reservoir fluid tank (리저버 탱크의 Die Turning Injection 적용을 위한 Multi-field CAE 해석)

  • Lee, Sung-Hee
    • Design & Manufacturing
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    • v.15 no.1
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    • pp.66-71
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    • 2021
  • In this study, die turning injection(DTI) mold design for manufacturing reservoir fluid tanks used for cooling in-vehicle batteries, inverters, and motors was conducted based on multi-field CAE. Part design, performance evaluation, and mold design of the reservoir fluid tank was performed. The frequency response characteristics through modal and harmonic response analysis to satisfy the automotive performance test items for the designed part were examined. Analysis of re-melting characteristics and structural analysis of the driving part for designing the rotating die of the DTI mold were performed. Part design was possible when the natural frequency performance value of 32Hz or higher was satisfied through finite element analysis, and the temperature distribution and deformation characteristics of the part after injection molding were found through the first injection molding analysis. In addition, it can be seen that the temperature change of the primary part greatly influences the re-melting characteristics during the secondary injection. The minimum force for driving the turning die of the designed mold was calculated through structural analysis. Hydraulic system design was possible. Finally, a precise and efficient DTI mold design for the reservoir fluid tank was possible through presented multi-field CAE process.

Seismic Damage Assessment and Nonlinear Structural Identification Using Measured Seismic Responses (실측 지진응답을 이용한 지진손상도 평가 및 소성모형 추정)

  • 이형진;김남식
    • Journal of the Earthquake Engineering Society of Korea
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    • v.6 no.6
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    • pp.7-15
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    • 2002
  • In this paper, the nonlinear parameter estimation method using the estimated hysteresis of each structural members was studied for the purpose of efficient seismic damage prediction and estimation of MDOF nonlinear structural model in the shaking table test. The hysteresis of each structural members can be obtained by the conversion of measured response histories into relative motions of each structural members and member forces. These hysteresis can be used to evaluate various kinds of damage indices of each structural members. The MDOF nonlinear structural model for further analysis(re-analysis) can be easily reconstructed using estimated nonlinear structural parameters of each structural members. To demonstrate the proposed techniques, several numerical and experimental example analyses are carried out. The results indicate that the proposed method can be very useful to assess local seismic damages of structures.

Moving Load Analysis of Bridge Structures Using Experimental Modal Data (실험적 모우드 계수를 이용한 교량의 주행하중 해석)

  • 이형진
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.15 no.3
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    • pp.409-420
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    • 2002
  • This paper proposed a technique of structural re-analysis for the evaluation of dynamic responses of bridge structure under moving loads using experimental modal results. For successful structural re-analysis, it is required to have accurate estimation techniques of the modal characteristics of bridge structures. The natural frequencies and mode shapes were identified by direct fourier analysis techniques and damping ratios by the random decrement method, respectively. An interpolation method was also proposed for the extension of mode shape measured on limited DOFs. Second, the structural reanalysis was performed using moving mass model and identified modal parameters. The results from the reanalysis show that the proposed technique is very reasonable to evaluate the actual behavior of bridge structures under moving loads.

Moment-Curvature Relationship of Structural Wells with Confined Boundary Element (단부 횡보강된 구조벽의 모멘트-곡률 관계)

  • Kang, Su-Min;Park, Hong-Gun
    • Journal of the Korea Concrete Institute
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    • v.15 no.2
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    • pp.323-334
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    • 2003
  • For performance-based design using nonlinear static analysis, it is required to predict the inelastic behavior of structural members accurately. In the present study, a nonlinear numerical analysis was peformed to develop the method describing the moment-curvature relationship of structural wall with boundary confinement. Through the numerical analysis, variations of behavioral characteristics and failure mechanism with the arrangement of vertical reinforcement and the length of boundary confinement were studied. According to the analysis, the maximum moment-carrying capacity of structural walls with adequately confined boundary elements is developed at the moment the unconfined concrete reaches the ultimate compressive strain. Walls with flexural re-bars concentrated on the boundaries fails in a brittle manner. As vortical re-bars in the web increases, the brittle failure is prevented and a ductile failure occurs. Based on the findings, moment-curvature curves for walls with a variety of re-bar arrangement were developed. According to the proposed relationships, deformability of the structural walls wth boundary confinement increases as the compressive strength of the confined concrete increases compared to the applied compressive force.

Structural Relationship among Regional Identity, Team Identification, and Re-attend Intention (지역정체성과 팀정체성, 재관람의도의 구조적 관계 : 프로축구 산업을 중심으로)

  • Kim, Ki-Tak
    • The Journal of the Korea Contents Association
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    • v.11 no.4
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    • pp.404-413
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    • 2011
  • The research for the regional identity including relationships with professional sport team was caused by local autonomy system and localism. This study was to verify structural relationships among regional identity, team identification and re-attend intention of professional soccer spectators. Data were collected from spectators of professional soccer game in 'D' metropolitan city. Using purposive sampling method, a total of 397 samples were used for analysis. The statistical techniques for data analysis were descriptive analysis, frequency analysis, reliability analysis, correlation analysis, confirmatory factor analysis, and structural equation modeling by SPSS 15.0 and AMOS 7 programs. The results of this study were that regional identity have a positive effects on team identification. Also, team identification have a positive effects on re-attend intention. Theoretical and practical implications and future research directions were provided.

Study on the Improvement of Strength of Excavator Attachments Considering the Field Environment (굴삭기 작업장치의 설계 하중을 고려한 강도 개선에 대한 연구)

  • Nam, Kwang-Sik;Choi, Jin-Kyu;Choi, Ho-Min;Kim, Jae-Ki;Yeum, Sang-Hun;Lee, Seok-Soon
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.1
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    • pp.122-128
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    • 2016
  • The purpose of this study was to develop improved strength of an arm and a boom on over-load environment, which causes damage in the initial design statement. To develop improved strength of an excavator front group, we calculated load conditions using the MATLAB program, and using these conditions, we performed a structural analysis of an excavator front group for the maximum digging force condition. Finally we performed a topology optimization to reduce weights of an arm and a boom, and we re-modeled an arm and a boom based on the topology design results and re-performed the structural analysis. The strength of the re-design is higher than the initial design but its weight is almost the same as the initial design.

Toward a System of Integrating Structural Analysis and Design Procedures (구조해석과 설계과정의 통합시스템에 관하여)

  • 이주성;오석진
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1993.10a
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    • pp.120-127
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    • 1993
  • This paper is concerned with the integrated computer program system aiming at efficiently performing the structural analysis and design. The developed computer program system is introduced and applied to a simple two-dimensional structure to show the general concept of the integrated system. Some design modifications and re-analyses are illustrated including local mesh refinement, These show the efficiency in doing design modification and analysis.

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Crack analysis of reinforced concrete members with and without crack queuing algorithm

  • Ng, P.L.;Ma, F.J.;Kwan, A.K.H.
    • Structural Engineering and Mechanics
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    • v.70 no.1
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    • pp.43-54
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    • 2019
  • Due to various numerical problems, crack analysis of reinforced concrete members using the finite element method is confronting with substantial difficulties, rendering the prediction of crack patterns and crack widths a formidable task. The root cause is that the conventional analysis methods are not capable of tracking the crack sequence and accounting for the stress relief and re-distribution during cracking. To address this deficiency, the crack queuing algorithm has been proposed. Basically, at each load increment, iterations are carried out and within each iteration step, only the most critical concrete element is allowed to crack and the stress re-distribution is captured in subsequent iteration by re-formulating the cracked concrete element and re-analysing the whole concrete structure. To demonstrate the effectiveness of the crack queuing algorithm, crack analysis of concrete members tested in the literature is performed with and without the crack queuing algorithm incorporated.

Development of Drift Design Method Considering Characteristics of Member Forces (부재력 특성을 고려한 변위조절설계법 개발)

  • 서지현;박효선
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2003.10a
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    • pp.123-129
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    • 2003
  • Drift design using resizing techniques can be a very practical method in drift design of high-rise buildings since it cannot require sensitivity analysis and structural re-analysis. Resizing techniques has used the cross sectional areas as design variable and supposed that displacement participation factors are inversely proportional to structural weights. Efficiency of resizing techniques based on displacement participation factors may depend on proper selection of sectional properties as design variables. In this study, two different drift design methods with the different sectional properties as design variables are presented and applied to a 20-story structure.

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