• Proceedings of the Computational Structural Engineering Institute Conference
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• 2008.04a
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• pp.470-475
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• 2008

Building Information Modeling(BIM) is rooted in the economic and functional advantages of maturing from paper-based 2D drawings. The paper-based design and construction drawings are typical production from BIM and using the drawing under BIM environment is needed because there is not an alternative media instead of paper-based drawings. However using the 2D drawing process based on 2D CAD for BIM environment directly has difficulties because there are significant differences in data structure between CAD and BIM. CAD is based on traditional drawings as a whole while BIM is focused on individual objects and providing various levels of information associated with the objects. It can be an obstacle to move from 2D CAD to BIM that we don't have a standard or guideline for BIM. Futhermore, the complexity of drawing in representation would be the obstacle too, so the solution is discussed in the research based on the case of Samoo Architects and Engineers.

• Transactions of Materials Processing
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• v.9 no.3
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• pp.313-319
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• 2000

Finite element analysis is carried out for simulation of the multi-stage elliptic cup drawing process with the large aspect ratio. The analysis incorporates with shell elements for an elasto-plastic finite element method with the explicit time integration scheme. For the simulation, LS-DYNA3D is utilized for its wide capability of solving forming problems. The simulation result shows that the non-uniform drawing ratio at the elliptic cross section ad the small shoulder radius cause failure such as tearing and wrinkling. The result suggests the guideline to modify the tool shape for prevention of the failure during the drawing process.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2000.10a
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• pp.105-108
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• 2000

Finite element analysis of a multi-stage deep drawing process is carried out for the die design of rectangular cup drawing with the large aspect ratio. Simulation is performed for thorough investigation of unfavorable mechanisms in the initial design. The analysis reveals that the difference of the drawing ratio and the irregular contact condition produces non-uniform metal flow to cause wrinkling and severe extension. In this paper, the modification guideline is proposed in the design of the process and the tool shape. The analysis result confirms that the modified design not only improves the quality of a deep-drawn product but also reduces the possibility of failure.

• Transactions of Materials Processing
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• v.10 no.2
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• pp.144-150
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• 2001

Tool design is introduced in a multi-stage rectangular cup drawing process with the large aspect ratio. Finite element simulation is carried out to investigate deformation mechanisms with the initial tool design. The analysis reveals that the difference of the drawing ratio and the irregular contact condition produces non-uniform metal flow to cause wrinkling and severe extension. For remedy, the modification guideline is proposed in the design of the tool and process. Analysis results confirm that the modified tool design not only improves the quality of a deep-drawn product but also reduces the possibility of failure.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.05a
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• pp.236-239
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• 2009

Cowl cross bar, a component of automotive cockpit module, has been manufactured by using welding processes of several tube parts with different diameters. However, in order to reduce costs and increase the quality, it is required to develop a new production method to manufacture the cowl cross bar as one-piece In this study, therefore, eliminating the welding process, tube drawing process which is one of metal forming processes was designed by using combined drawing technique. In addition, the selectable range of area reduction ratio was defined as a design guideline and the designed process sequence was verified by finite element analysis.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2002.05a
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• pp.90-93
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• 2002

Assuring required dimensional tolerance after spingback becomes the main concern of sheet-forming die designers when formability is secured through previous tryout. As a part to build a guideline to control springback in automobile frame forming, experiments are carried out to show the effects of process parameters, such as holding force, blank size, and lubrication, on corner angles of channels formed by U-bending or by square-cup drawing and trimming. The results are resented in the viewpoint of evaluating parameters.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.26 no.6
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• pp.1077-1084
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• 2002

Optimum tool design is carried out fur a multi-stage rectangular cup deep-drawing and ironing process with the large aspect ratio. Finite element simulation is carried out to investigate deformation mechanisms with the initial design made by an expert. The analysis considers the deep drawing process with ironing for the thickness control in the cup wall. The analysis reveals that the difference of the drawing ratio within the cross section and the irregular contact condition produce non-uniform metal flow to cause wrinkling and severe extension. For remedy, the modification guideline is proposed in the design of the tool and the process. Analysis results confirm that the modified tool design not only improves the quality of a deep-drawn product but also reduces the possibility of failure. The numerical result shows fair coincidence with the experimental one. After tryouts of the tool shape, the rectangular cup has been produced in the transfer press.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4D
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• pp.553-560
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• 2008

As it was developed to korea standard of the CAD Drawing in Construction CALS/EC for the productivity Improvement in Construction Industry and efficiency rising of construction management. it is high time to design the standard system in water resources. The purpose of this study is to establish the strategies for standard system of drawing information in water Resources parts for construction CALS/EC. This study is to analyse the existing construction drawing standards including CMS, CMMS, drawing guideline of a water Resources public institution, ISO, US National CAD Standard, Japanese Standard. As a result of the analysis, this study proposes the prime structure of the water Resources drawing information standard to support construction CALS/EC. For the establishment of standard system in real practice, this study establishes the numbering system to joint the current standard system for a water Resources order institution and to keep construction CALS/EC. In conclusion, the standard system of drawing information is proposed as a fundamental frame to water Resources parts of construction CALS/EC.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.10a
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• pp.420-423
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• 2009

In this study, the guideline for designing the drawbeads used in the stamping dies for advanced high strength steel (AHSS) sheets is investigated. In the drawbead drawing test, the drawbead forces for verifying the equivalent drawbead model(EDM) and the sheet strains for finding marginal strains from $FLC_0$ are measured. In the finite element analysis (FEA), the bending allowance, R/t, is obtained. Based on the forming and bending allowances obtained, the design guideline of the drawbead for determining height and width, which depends on the restraining force and the forming allowance, is prepared by using EDM.

• Journal of Korean Society of Rural Planning
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• v.15 no.1
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• pp.1-13
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• 2009

This study tried to establish a renewal guideline for rural villages through the analysis on locational characteristics of amenity/disamenity elements. Space Syntax Method was applied to analyze the locational characteristics of amenity/disamenity elements in qualitative terms. The study was carried out by 5 steps: Selection of amenity/disamenity classification table and case study villages(used same ones as in the previous study) ${\rightarrow}$ Drawing of base-map for spatial analysis ${\rightarrow}$ Preparation of final study-map after field survey ${\rightarrow}$ Spatial analysis using the Space Syntax Method ${\rightarrow}$ Proposing of a rural village renewal guideline. Through the application study to the case study villages, it was ascertained that the renewal guideline proposed in this study would well help reflect spatial characteristics of amenity/disamenity elements in plan-making works of rural villages.