Parametric Design for Aesthetic Shapes by Curve-Ruler Utilization

2008 ◽  
Author(s):  
Tetsuo Oya ◽  
Hiroshi Kato ◽  
Masatake Higashi
Keyword(s):  
Automotive Industry ◽  
Parametric Design ◽  
Curvature Variation ◽  
Different Characteristics ◽  
Generation Procedure

This paper presents a method to generate an aesthetic surface which is represented by two guide curves and a curve-ruler. A curve-ruler is an expression of a ruler whose curvature variation is monotone and aesthetic, and it is a mathematical version of the actual ruler used in the automotive industry. A ruler-surface is a surface which is a locus of the curve-ruler moving along two guide curves. First, a generation procedure of a guide curve and conditions for producing an aesthetic surface are described. Then, a ruler-surface is formulated parametrically according to the movement of the ruler along two guide curves. Examples of ruler-surfaces show that this method can generate surfaces with different characteristics by various kinds of curve-rulers. Modeling examples are presented indicating that the method could be a supportive system for designer’s intuitive work.

CRUSH CHARACTERISTICS OF ADHESIVELY BONDED COMPOSITE-ALUMINUM TUBES

2021 ◽  
Author(s):  
MONISH URAPAKAM RAMAKRISHNAN ◽  
PANKAJ K. MALLICK
Keyword(s):  
Automotive Industry ◽  
High Performance ◽  
Adhesive Bonding ◽  
Heavy Vehicle ◽  
Adhesively Bonded ◽  
Element Analysis ◽  
Space Frames ◽  
Bonded Composite ◽  
Light Weighting ◽  
Different Characteristics

Tubular members are used in the automotive industry for body, chassis, and powertrain components such as front rails, underbody frames or sub frames, driveshaft structures and space frames. They are also extensively used in buses and other heavy vehicle structures. With focus on light-weighting, there is increasing use of multimaterial structures with aluminum and high-performance composites. Joining a variety of materials with different characteristics and compositions is a major challenge for the design of such structures. Hence, adhesive bonding is emerging as one of the key joining technique for multi-material structures due to their compatibility with commonly used lightweight materials. Since tubular joints in automotive structures may experience crush type load, this study considers the crush characteristics of composite-aluminum tubular adhesive joints using finite element analysis.

Style Design System Based on High-Quality Aesthetic Shapes to Support Designer’s Creative Activity

2013 ◽  
Author(s):  
Fumihiko Kimura ◽  
Tetsuo Oya ◽  
Hideki Aoyama
Keyword(s):  
Automotive Industry ◽  
Previous Method ◽  
Design System ◽  
Creative Activity ◽  
Class A ◽  
Curvature Variation ◽  
Geometric Conditions ◽  
Generating Method ◽  
Aesthetic Standard ◽  
Extension Class

Class A shapes are used as an aesthetic standard mainly in automotive industry. Those used in products’ exterior are closely related to products’ values. Class A shapes have two geometric conditions: The surface has enough geometrical continuity, and smooth and continuous highlight lines. In our previous study, we developed a Class A curve generating method and style design system. Using this system, an user can create a model with several Class A curves. Then, we created a model by this system to evaluate the proposed method. Although we can create an aesthetic shape using this system, some shapes were not good in curvature variation. There is reason why some generated curves didn’t produce Class A shapes. In this study, we investigate more detailed conditions of Class A curve, and improve the Class A shape generating method using Class A curve. In our new method, we extend the range of Class A conditions. By this extension, Class A shape can be generated more efficiently than the previous method. Then, we create a model using this method in order to evaluate the surface quality, and discuss the effectiveness of our system.

Stone Laying Computer Aided Design Research

2013 ◽  
Vol 373-375 ◽  
pp. 1796-1799
Author(s):  
Yuan Yuan Jin ◽  
Zi Chuan Li ◽  
Min Zhao
Keyword(s):  
Computer Aided Design ◽  
Design Research ◽  
Parametric Design ◽  
Utilization Rate ◽  
Design Work ◽  
Board Type ◽  
Computer Aided ◽  
Aided Design ◽  
Different Characteristics ◽  
Important Design

Stone laying is one of the most important design work for stone manufacturer, and it is also the basis of board processing. The geometry area which is decorated is varied. It exists not only "flat" and "closed", but has their own different characteristics. In this paper, stone laying will be divided into three parts: line laying, board type laying and special-shaped slab laying. By analyzing its characteristics and using computer-aided design, according to the method of parametric design and the parameters which are input, we can output corresponding laying rendering. It can improve the machining efficiency and utilization rate of stone, and achieve the intellectualization of stone design and processing.

scholarly journals Product customization and generative design

2021 ◽  
Vol 11 (4) ◽  
pp. 87-95
Author(s):  
Laura Trautmann
Keyword(s):  
Customer Satisfaction ◽  
Automotive Industry ◽  
Parametric Design ◽  
New Product ◽  
Generative Design ◽  
Product Families ◽  
Aircraft Manufacturing ◽  
Product Customization ◽  
Process Oriented ◽  
Mathematical Relationships

Parametric design is essentially a generative design that can be created using a computer and mathematical relationships. In a process-oriented way (instead of changing the shape), we modify the components' parameters that make up the shape, resulting in a new look. Because manipulations' consequences can be seen immediately, the development of product families and new product variants can be implemented quickly. With the help of parametric design, customizing the product and increasing customer satisfaction is more efficient, as several successful projects have already shown in automotive industry, aircraft manufacturing, architecture, jewellery manufacturing, etc.

scholarly journals Parametric Design Method of Aesthetic Shapes with Smooth Curvature Variation

2009 ◽  
Vol 75 (5) ◽  
pp. 663-668
Author(s):  
Tetsuo OYA ◽  
Takenori MIKAMI ◽  
Takanobu KANEKO ◽  
Masatake HIGASHI
Keyword(s):  
Parametric Design ◽  
Design Method ◽  
Curvature Variation

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

Mexican practical anthropometry of automotive industry workers

2010 ◽  
Author(s):  
Bustillos Enrique de la Vega ◽  
Karla Lucero Duarte ◽  
Octavio Lopez Millan
Keyword(s):  
Automotive Industry

Antithrombin Activity of Intact Human Platelets

1975 ◽  
Vol 34 (01) ◽  
pp. 115-126 ◽  
Author(s):  
Kiyoake Watanabe ◽  
Francis C Chao ◽  
James L Tullis
Keyword(s):  
Antithrombin Iii ◽  
Human Platelets ◽  
Significant Loss ◽  
Red Cells ◽  
Antithrombin Activity ◽  
Α2 Macroglobulin ◽  
Rapid Reaction ◽  
Pre Treatment ◽  
Different Characteristics

SummaryAntithrombin activity has been identified in intact washed human platelets. An apparent activity was demonstrated at platelet concentrations above 0.31 × 109/ml, when platelet suspensions were incubated with 2.0 NIH units/ml of thrombin. Neither red cells nor white cells revealed antithrombin activity. No significant loss of the platelet antithrombin activity was observed after ten successive washings or after treatment of platelets with antibodies to antithrombin III or α2-macroglobulin. Almost the same amount of antithrombin activity as normal platelets was demonstrated in the platelets from an afibrinogenemic patient. Pre-treatment of platelets with trypsin, papain, and neuroaminidase reduced the activity significantly, whereas lipase was without effect. The platelet antithrombin reacted with thrombin in less than 3 seconds, and this rapid reaction of platelet antithrombin was different from that of plasma antithrombin III or fibrinogen. The thrombin-like clotting activity of ancrod was inhibited by fibrinogen but not platelets. Also, unlike plasma antithrombin III or fibrinogen, brief exposure to heat (56° C or 60° C) reduced considerable amounts of platelet antithrombin activity. These results suggest that platelets possess a specific antithrombin with different characteristics from other known antithrombins.

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