Papers by Keyword: Shape Design

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Authors: Tjamme Wiegers, Chen Sheng Wang, Joris S.M. Vergeest
Abstract: Human-computer interaction is often mainly based on the requirements of the software. However, for optimal communication between computer software and its users, the interaction should also fit to the way people work best. To be able to improve interaction with shape modeling software, a study was performed to investigate how people describe shape. The goal is to use the results of the study to adapt the interaction of shape modeling software in such a way that it better connects to the way people think and speak about shape. The study investigates which terms people use to describe shapes and shape operations. Furthermore, it investigates the differences and similarities among subjects who name shapes and shape operations. The study was done among Chinese bachelor students. For this research, a list was composed, containing descriptions of shapes and shape operations. All items in the list were then presented in pictures. The subjects had to name the shapes and shape operations that were depicted by the pictures. The paper describes the research method and shows how the results are analyzed. Furthermore, some first results are shown. Finally, possible implications for future human-computer interaction are discussed.
1407
Authors: Hyung Jun Kim, Heung Youl Kim, Soo Young Park
Abstract: Composite beam using asymmetric H-shaped steel is one of the constructional structures developed in the advanced countries in Europe since early 1990s. The purpose of this study on composite beams where H-shaped steel is partially laid in concrete slabs was to find how to design fire protection and improve fire-resistance to make deep deck plates provide the beams with advantages upon a fire and to improve stiffness in structural aspect. Only lower flange which is directly exposed to a fire was included in fire-resistance design in order to decide optimal fire- protection design condition and test was conducted for spray-coating and paint-coating. In the fire resistance test, web thickness and lower flange thickness were varied to derive the optimum condition for improving fire-resistance performance. It was observed from the test that 90-minute-protection employed to lower flange provided fire resistance for 3 hours. It was also observed that the basic shape resisted fire for 89 minutes, while web reinforcement and lower flange reinforcement provided fire-resistance for 112 and 157 minutes, respectively. The result showed that lower flange reinforcement is the most effective way to improve fire-resistance.
752
Authors: Hyung Jun Kim, Heung Youl Kim, Soo Young Park
Abstract: Composite beam using asymmetric H-shaped steel is one of the constructional structures developed in the advanced countries in Europe since early 1990s. The purpose of this study on composite beams where H-shaped steel is partially laid in concrete slabs was to find how to design fire protection and improve fire-resistance to make deep deck plates provide the beams with advantages upon a fire and to improve stiffness in structural aspect. Only lower flange which is directly exposed to a fire was included in fire-resistance design in order to decide optimal fire- protection design condition and test was conducted for spray-coating and paint-coating. In the fire resistance test, web thickness and lower flange thickness were varied to derive the optimum condition for improving fire-resistance performance. It was observed from the test that 90-minute-protection employed to lower flange provided fire resistance for 3 hours. It was also observed that the basic shape resisted fire for 89 minutes, while web reinforcement and lower flange reinforcement provided fire-resistance for 112 and 157 minutes, respectively. The result showed that lower flange reinforcement is the most effective way to improve fire-resistance.
1103
Authors: Xiao Wei Jiang, Qiu Lei Du
Abstract: In view of well- designed treadmill is advantageous to healthy, the author analyzes the design problem of the existing treadmill which exists in using function, art function and material technique function and others, discusses the shape design, the color design and the components design. Among them t the components design mainly elaborate the bottom frame design, the handrail design and other designs. Then the possibility is analyzed. On this foundation, the design practice of new type treadmill is done.
2923
Authors: Xin Ye, Quan Yuan, Hua Cong, Hai Bo Ma, Dong Liang Wei
Abstract: This paper constructs three types of bioprosthetic valve leaflets’ parametric model via computer aided design, a series of accurate parameters of the bioproshtetic heart valve, such as radius of the sutural ring, height of the supporting stent and inclination of the supporting stent, are determined. Numerical simulation is used to determine the effect of different shape designs on the mechanical performance of the bioprosthetic valve leaflet. The dynamic behavior of the valve during diastolic phase is analyzed. The finite element analysis results show the stress distribution of the ellipsoidal and spherical valve leaflets are comparatively reasonable. The ellipsoidal and spherical valve leaflets have the following advantages over the cylindrical leaflet valve, lower peak von-Mises stress, smaller stress concentration area, and relatively uniform stress distribution. The ellipsoidal and spherical valve leaflets may contribute to the long term durability of the valve. This work is very helpful to manufacture valvular leaflets with reasonable shapes and to prolong the lifetime of the bioprosthetic heart valve.
2683
Authors: Xia Zhang, Quan Yuan, Xu Huang, Hai Bo Ma
Abstract: In order to improve long-term durability of bioprosthetic heart valve, stress distribution of bioprosthetic heart valve leaflets with different shapes and suture density under the same load is analyzed and compared based on finite element method.The finite element analysis results are compared with each valve model, it shows that suture density has a significant effect on the dynamic behavior of the bioprosthetic heart valve, which may lead not only to different stress peak values, but also to different stress distributions and deformation. This work can be very helpful when manufacturing the bioprosthetic heart valve.
1348
Authors: Xu Huang, Quan Yuan, Hua Cong, Hai Bo Ma, Xin Ye
Abstract: The paper constructs one type of bioprosthetic valve leaflets’ parametric model via computer aided design, a series of accurate parameters of the bioproshtetic heart valve, such as radius of the sutural ring, height of the supporting stent and inclination of the supporting stent, are determined. Numerical simulation is used to determine the effect of one shape design on the mechanical performance of the bioprosthetic valve leaflet. The stress with a shape under the same load is analysed and the thickness of the leaflets 0.5mm and 0.6mm is compared by us. We creat a ellipsoidal surface in accordance with geometrical features. The experimental results of the finite element analysis show that stress distribution of the same bioprosthetic heart valve leaflets with different thickness is different. The maximal primary stress with the thickness of 0.5mm is lower than the others. This work is very helpful to manufacture reasonable shaped valvular leaflets and to prolong the lifetime of the bioprosthetic heart valve.
479
Authors: Li Ming Fu, Hai Yang Yu
Abstract: This paper studied the process that how the automotive body shapes raise the psychological reflects and proposed an intention bionic principle to explain this mental process. Established the related model and used it to analyze the relationships between automotive body shape design and the psychological feelings of living organisms. Then, analyzed the automotive body characteristics of Audi A8 and Q5, as a further illustration of this principle. Thus, opened up a new research method and provided a new approach for the work of automotive body shape design.
2638
Authors: Xiao Wei Jiang, Qiu Lei Du
Abstract: In view of well- designed showing platform is advantageous to promoting exhibition effect, the author analyzes the developing course of showing platform, and combining the mechanical design problem of existing showing platform which exists in using function, art function and material technique function and others, discusses the mechanical design requirement, the fundamental structure and working principle, the shape design and the color design of showing platform of rotation and vertical reciprocation. Among them the fundamental structure and working principle mainly elaborate the constituent parts of showing platform, the structure characteristics and working manner. Then the possibility is analyzed. On this foundation, the practical application of showing platform of rotation and vertical reciprocation is analyzed.
66
Authors: Hong Wang, Chong Jin, Xiao Zhou Xia, Hong Yuan
Abstract: A fitting curve of stress-strain relation given is applied in numerical analyzing based on Legendre orthogonal polynomial and least square method. The nonlinear constitutive model is employed to examine the shape of an arch dam. For the asymmetries and high water pressure, the safety of High Arch Dam is one of key issues in the design and construction of High Arch Dam. The simulation results show that the basic mechanical performance index is symmetrical distribution. The dam mainly bears pressure and no obvious tensile stress exists in the dam when water level is normal. Material yields in dam heel when 1.4 times overloading is considered. It can be concluded that the dam is reliable and the safety margin is satisfactory.
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