scholarly journals USING A PROJECT ON ASSISTIVE TECHNOLOGY TO TEACH CAD AND RAPID PROTOTYPING

2018 ◽  
Author(s):  
Shalaleh Rismani ◽  
Peter Ostafichuk ◽  
Carol Jaeger ◽  
Jonathan Nakane
Keyword(s):  
Rapid Prototyping ◽  
Assistive Technology ◽  
Stakeholder Engagement ◽  
Computer Aided Design ◽  
First Year ◽  
Design Decision ◽  
Formal Instruction ◽  
Novel Approach ◽  
Design Competition ◽  
Aided Design

Abstract - This paper describes a novel approach used in a first year engineering at UBC to teach computer-aided design (CAD) and rapid prototyping as part of a real-world design project. It is centred on the design of an assistive technology device for a real client who is a quadriplegic and has limited use of his hands.  Notably, students were able to create their designs in CAD without receiving any formal instruction on the use of the tool. In addition to CAD and rapid prototyping,the project integrated elements of stakeholder engagement, design, decision-making, and communication. By the end of the three-week module, students submitted a technical memorandum recommending their design, and they were able to submit their CAD files for 3D printing and for entry into an inaugural assistive technology design competition.

scholarly journals Development of integrated intelligent computer-aided design system for mechanical power-transmitting mechanism design

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401771038 ◽  
Author(s):  
Isad Saric ◽  
Adil Muminovic ◽  
Mirsad Colic ◽  
Senad Rahimic
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Numerical Control ◽  
Numerical Control ◽  
Mechanical Power ◽  
Design System ◽  
Computer Aided ◽  
Aided Design ◽  
Intelligent Computer

This article presents architecture of integrated intelligent computer-aided design system for designing mechanical power-transmitting mechanisms (IICADkmps). The system has been developed in C# program environment with the aim of automatising the design process. This article presents a modern, automated approach to design. Developed kmps modules for calculation of geometrical and design characteristics of mechanical power-transmitting mechanisms are described. Three-dimensional geometrical parameter modelling of mechanical power-transmitting mechanisms was performed in the computer-aided design/computer-aided manufacturing/computer-aided engineering system CATIA V5. The connection between kmps calculation modules and CATIA V5 modelling system was established through initial three-dimensional models – templates. The outputs from the developed IICADkmps system generated final three-dimensional virtual models of mechanical power-transmitting mechanisms. Testing of the developed IICADkmps system was performed on friction, belt, cogged (spur and bevel gears) and chain transmitting mechanisms. Also, connection of the developed IICADkmps system with a device for rapid prototyping and computer numerical control machines was made for the purpose of additional testing and verification of practical use. Physical prototypes of designed characteristic elements of mechanical power-transmitting mechanisms were manufactured. The selected test three-dimensional virtual prototypes, obtained as an output from the developed IICADkmps system, were manufactured on the device for rapid prototyping (three-dimensional colour printer Spectrum Z510) and computer numerical control machines. Finally, at the end of the article, conclusions and suggested possible directions of further research, based on theoretical and practical research results, are presented.

The Development Stages of Rear Upright for Formula Car

2004 ◽  
Author(s):  
Ismail Fidan ◽  
Adam McGough ◽  
Jeff Foote
Keyword(s):  
Rapid Prototyping ◽  
Virtual Manufacturing ◽  
Small Scale ◽  
First Year ◽  
Design Tools ◽  
Golden Eagle ◽  
Development Stages ◽  
Formula Sae ◽  
Race Car ◽  
Design Competition

Formula SAE (FSAE) is a design competition organized each year by the Society of Automotive Engineers (SAE). The objective of the competition is to bring the best and brightest future engineers from each participating school to present a small scale race car. Although this sounds like a relatively simple concept, the actual execution is rather challenging and rewarding for the team. For almost three years Tennessee Tech University (TTU) has had a FSAE team. The first year was a planning year, so Tennessee Tech University has participated in the competition for the last two years. Both years have been extreme learning experiences since TTU was not prepared for the level of competition brought by participating schools. However TTU FSAE team is beginning to implement modern design tools such as FEA, Virtual Manufacturing, and Rapid Prototyping to help streamline the design efforts so that one day Golden Eagle FSAE will be one of the top competing teams. In this publication, authors will report on one Golden Eagle FSAE component (the rear upright) development stages and its accomplishments.

A Multi-User Computer-Aided Design Competition: Experimental Findings and Analysis of Team-Member Dynamics

2017 ◽  
Vol 17 (3) ◽  
Author(s):  
Brett Stone ◽  
John Salmon ◽  
Keenan Eves ◽  
Matthew Killian ◽  
Landon Wright ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Value Added ◽  
Future Research ◽  
Calendar Time ◽  
Competition Analysis ◽  
Computer Aided ◽  
Design Competition ◽  
Purdue Spatial Visualization Test ◽  
Experimental Findings ◽  
Aided Design

A competition for teams of three students using a prototype multi-user computer-aided design (MUCAD) tool was held to investigate various hypotheses regarding the performance of teams in such a setting. By comparing models from the competition to the same model in a single-user CAD environment, it is seen that use of a MUCAD system can significantly increase the value-added per unit of calendar time for a modeling effort. An investigation was also made into the causes of the performance differences among the various MUCAD teams which participated in the competition. Analysis of the results shows that teams that encouraged effective forms of communication and teams whose members scored similarly on the Purdue Spatial Visualization Test: Visualization of Rotations (PSVT:R) performed better than other teams. Areas of future research in analyzing teams in MUCAD environments are suggested.

Application of Rapid Prototyping Technology in Intelligent Optimization Design Area

2013 ◽  
Vol 404 ◽  
pp. 754-757 ◽  
Author(s):  
Ludmila Novakova-Marcincinova ◽  
Jozef Novak-Marcincin
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Optimization Design ◽  
Three Dimensional ◽  
Scale Model ◽  
Intelligent Optimization ◽  
Computer Aided ◽  
Aided Design

Rapid Prototyping (RP) can be defined as a group of techniques used to quickly fabricate a scale model of a part or assembly using three-dimensional Computer Aided Design (CAD) data. What is commonly considered to be the first Rapid Prototyping technique, Stereolithography was developed by 3D Systems of Valencia, CA, USA. The company was founded in 1986, and since then, a number of different Rapid Prototyping techniques have become available. In paper are presented possibilities of Rapid Prototyping application in area of intelligent optimization design.

Numerical Simulation for Optimizing Tooth Profile Using Bezier Curve

2019 ◽  
Author(s):  
Kevin Qiu ◽  
Reza Samadi
Keyword(s):  
Numerical Simulation ◽  
Stress Reduction ◽  
Computer Aided Design ◽  
Bézier Curve ◽  
Bezier Curve ◽  
Bending Stress ◽  
Novel Approach ◽  
Design Variables ◽  
Numeric Simulation ◽  
Aided Design

Abstract The research hereby introduces a novel approach to reduce tooth bending stress using a parametric numeric simulation. This Finite Element Method (FEM) is used to determine optimal design variables for an asymmetric root profile of a helical gear defined by a rational cubic Bezier curve. The gear is first modelled using a machine design software and later implemented into a 3D computer aided design (CAD) package to modify the root spline geometry using a script. A nonlinear relationship exists between the design variables and tooth bending stress. Additionally, certain trends exist between the design variables to exhibit a more optimal root profile. The simulation results show that the proposed method is feasible as the general optimization process results in significant bending stress reduction. The numerical simulation demonstrates that bending stress can be reduced by as much as 10.75% by the proposed approach.

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