scholarly journals Pros and Cons of CAD

2006 ◽  
Vol 128 (09) ◽  
pp. 38-40
Author(s):  
Jean Thilmany
Keyword(s):  
Computer Aided Design ◽  
Digital Design ◽  
Design Engineers ◽  
Design Changes ◽  
Complex Shapes ◽  
Current Design ◽  
Pros And Cons ◽  
Aided Design ◽  
Straight Lines ◽  
A Current

This paper describes the pros and cons of computer-aided design (CAD). CAD packages lack features to easily make the intuitive, complex shapes so pervasive in modern products. It is much easier with CAD to create a part with square features and rectangles and straight lines and round things. Even in a current design project, engineers will sculpt the design in clay, scan it with a digitizer, bring it back into the CAD package, then change it into a solid model and refine that. One of the biggest criticisms of CAD systems is that digital design is slower than sketching and that inhibits the brainstorming process. Today’s systems are not equipped to let engineers play with a design. Engineers start with a basic design and they can change parameters as they draw, but cannot change complete concepts midstream or cut and paste ideas between designs. Most CAD packages include features that track design changes so engineers working collaboratively can see what's been changed, where, when, and why.

scholarly journals The Quiet Forefront

2014 ◽  
Vol 136 (08) ◽  
pp. 44-49 ◽  
Author(s):  
Jean Thilmany
Keyword(s):  
Computer Aided Design ◽  
Consumer Electronics ◽  
Element Analysis ◽  
Design Engineers ◽  
Acoustical Analysis ◽  
Design Changes ◽  
Development Cycle ◽  
Design Cycle ◽  
The Many ◽  
Aided Design

This article highlights the acoustical analysis changes made by manufacturers in design cycle. Acoustical simulation is being pushed from experts to designers, following the trend for the last 15 or so years that saw other types of engineering applications like finite element analysis and computational fluid dynamics become integrated with computer-aided design packages used by mechanical engineers. With the advent of software packages that allow for design and for acoustical analysis in tandem, design engineers are increasingly running these analyses early in the development cycle and are making design changes to decrease noise and vibration issues they find. Experts suggest that with speaker sound quality and other pertinent information in hand, designers can actually design from the get-go with that information in mind, resulting in fewer design changes down the line. Though early acoustical simulation is still perhaps one of the consumer electronics’ industries best-kept secrets, that’s likely to change as word gets out about the many advantages of front-line simulation.

scholarly journals CAD meets CAE

1999 ◽  
Vol 121 (10) ◽  
pp. 66-69
Author(s):  
Jean Thilmany
Keyword(s):  
Computer Aided Design ◽  
Design Engineers ◽  
Swing Arm ◽  
Computer Aided ◽  
Bicycle Frame ◽  
Current Design ◽  
One Year ◽  
Aided Design ◽  
Cae System ◽  
First Time

This article focuses on engineering developments to integrate computer-aided engineering (CAE) and computer-aided design (CAD) capabilities in a software. CAD/CAE software suites are making their way to the forefront of current design practices, because they contain capabilities that allow designers to build an initial prototype that has already been analyzed by the CAE system for design flaws. Engineers at Cannondale have used an integrated CAD/CAE package to cut one year from the design time of their full-suspension Raven frame, which is both lightweight and stiff and has a suspension fork and a rear swing arm. The CAD software is used to design the bicycle frame while the CAE software immediately analyzes design flaws, which are then corrected, eliminating the need for continual prototyping. Companies are finding that the easy-to-learn nature of these CAD/CAE programs allows them to put analysis capability in the hands of design engineers for the first time.

scholarly journals МОДЕРНИЗАЦИЯ ЗДАНИЙ С ЦЕЛЬЮ ПОВЫШЕНИЯ ЭНЕРГОЭФФЕКТИВНОСТИ, КОМФОРТА И БЕЗОПАСНОСТИ ПРОЖИВАНИЯ, А ТАКЖЕ ПРОДЛЕНИЯ СРОКА ЭКСПЛУАТАЦИИ ЖИЛЫХ ЗДАНИЙ

Globus ◽  
2021 ◽  
Vol 7 (6(63)) ◽  
pp. 3-5
Author(s):  
Мохаммед Яхья
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Point Of View ◽  
Joint Work ◽  
Technological Processes ◽  
3D Cad ◽  
Computer Aided ◽  
Current Design ◽  
Pros And Cons ◽  
Aided Design

The formation of current design technologies is analyzed. The current situation in the intended work, the pros and cons of technological processes of the concept of computer-aided design (CAD) are considered. The ability to design together with the use of 3D CAD, allowing to correctly create plans, technological processes for the purpose of joint work with facet geometry, is investigated. Conclusions are formulated regarding the prospects from the point of view of increasing the productivity of the application of the CD application together with built-in abilities, not only parametric, but also from the point of view of direct forecasting. Today’s technological processes of design are presented: 3D-representation, photography, as well as azure scanning, making planning, 3D printing.

INTEGRATION AND EVALUATION OF A PROPOSAL FOR STRATEGIC KNOWLEDGE TEACHING IN CAD

10.6036/9505 ◽  
2021 ◽  
Vol 96 (1) ◽  
pp. 145-149
Author(s):  
XABIER GARIKANO OSINAGA ◽  
MIKEL GARMENDIA MUJIKA ◽  
ANGEL PEREZ MANSO ◽  
ENEKO SOLABERRIETA MENDEZ
Keyword(s):  
Computer Aided Design ◽  
Empirical Test ◽  
Control Group ◽  
Strategic Knowledge ◽  
Learning Framework ◽  
Design Changes ◽  
Professional Requirements ◽  
Teaching Learning ◽  
Didactic Strategies ◽  
Aided Design

Computer-aided design competency is critical for an engineering graduate starting in the world of work. Therefore, the development of this competency must be in line with professional requirements and consider the design constraints. For example, in the case of modeling, a geometrically correct model may not be sufficient if it is unable to withstand the modifications required by design changes. Therefore, we consider that training must be based on the development of this knowledge, known as strategic knowledge, and encourage its acquisition. This article describes a CAD training proposal focused on the development of strategic knowledge. Starting from the contributions of researchers, the modeling process is broken down so that it can be reproduced in the different scenarios that may be presented at the time of modeling. In order to facilitate the acquisition of this knowledge, an active learning framework has been established and specific didactic strategies have been developed for this purpose. Finally, the results of an empirical test are presented after the implementation of this proposal in which the results show a notable improvement in the experimental group in relation to the control group. Keywords: CAD modeling, teaching-learning, strategic knowledge

scholarly journals Designing Thin 2.5D Parts Optimized for Fused Deposition Modeling

2019 ◽  
pp. 134-164 ◽  
Author(s):  
James I. Novak ◽  
Mark Zer-Ern Liu ◽  
Jennifer Loy
Keyword(s):  
Computer Aided Design ◽  
Fused Deposition Modeling ◽  
Outer Wall ◽  
Fused Deposition ◽  
Design Engineers ◽  
Test Pieces ◽  
New Knowledge ◽  
Deposition Modeling ◽  
Aided Design ◽  
Reference Graph

This chapter builds new knowledge for design engineers adopting fused deposition modeling (FDM) technology as an end manufacturing process, rather than simply as a prototyping process. Based on research into 2.5D printing and its use in real-world additive manufacturing situations, a study featuring 111 test pieces across the range of 0.4-4.0mm in thickness were analyzed in increments of 0.1mm to understand how these attributes affect the quality and print time of the parts and isolate specific dimensions which are optimized for the FDM process. The results revealed optimized zones where the outer wall, inner wall/s, and/or infill are produced as continuous extrusions significantly faster to print than thicknesses falling outside of optimized zones. As a result, a quick reference graph and several equations are presented based on fundamental FDM principles, allowing design engineers to implement optimized wall dimensions in computer-aided design (CAD) rather than leaving print optimization to technicians and manufacturers in the final process parameters.

WirePATH Rapid Tooling Process and Supporting Software Development

2003 ◽  
Author(s):  
Alexander Lee ◽  
James Brink ◽  
David Anderson ◽  
Karthik Ramani
Keyword(s):  
Computer Aided Design ◽  
Electrical Discharge Machining ◽  
Computer Software ◽  
Wire Edm ◽  
Overall Design ◽  
Design Changes ◽  
Mold Making ◽  
Recent Developments ◽  
New Applications ◽  
Aided Design

Recent developments in Computer Aided Design (CAD) have drastically reduced overall design cycle time and cost. In this paper, wirePATH, a new method for rapid direct tooling, is presented. By using specialized interactive segmentation computer software and wire electrical discharge machining (wire EDM), wirePATH can reduce manufacturing time and cost for injection molds, casting patterns, and dies. Compared to other conventional-mold making methods, wirePATH can reduce fabrication time by as much as 40 to 70%. Wirepath can use a combination of wire EDM and other processes. Our method provides a new means to produce a greater variety in products by changing only portions of the tooling. Segments allow a part of a mold to be replaced to accommodate design changes and repair. WirePATH enables new applications of wire EDM to more complex shapes by bridging the gaps between CAD, our method, wire EDM and conventional manufacturing processes.

scholarly journals Digital design and parameters optimization for plasmonic circuits

2019 ◽  
Vol 220 ◽  
pp. 03025
Author(s):  
Alexander Shesterikov ◽  
Andrey Leksin ◽  
Alexei Prokhorov
Keyword(s):  
Quantum Dots ◽  
Computer Aided Design ◽  
Surface Plasmon Polariton ◽  
Parameters Optimization ◽  
Digital Design ◽  
Plasmonic Waveguides ◽  
Full Field ◽  
Graphene Layers ◽  
Aided Design ◽  
First Time

The mathematical models for the CAD-platform of plasmonic circuits design have been developed. This platform provides the efficient framework for computer-aided design of semiconductor quantum dots and full-field electromagnetic simulation of surface plasmon-polariton propagation in plasmonic waveguides. The topology of an all-plasmonic devices based on graphene layers and quantum dots is proposed for the first time.

Exploratory design using constraints

1987 ◽  
Vol 1 (1) ◽  
pp. 59-71 ◽  
Author(s):  
Weng Tat Chan ◽  
Boyd C. Paulson
Keyword(s):  
Structural Design ◽  
Computer Aided Design ◽  
Design Solution ◽  
Simple Scheme ◽  
Dual Nature ◽  
Design Changes ◽  
Heuristic Procedures ◽  
Rules Of Thumb ◽  
Design Consistency ◽  
Aided Design

Engineering design involves the evaluation and satisfaction of a wide variety of constraints. The ability to represent and process these constraints in a computer is important for the verification of the output produced by computer-aided design programs. Constraints need not only check designs but can also be used to derive design solution s that satisfy constraints. The paper discusses how to represent the dual nature of constraints so that design consistency is maintained as the design evolves.Assumptions and rules of thumb are used frequently in design to propose initial solutions. We represent the logic behind the derivation of these assumptions as heuristic procedures and maintain the dependencies between these assumptions and their consequents as an aid to the management of design consistency. We also propose a simple scheme, involving the partitioning of the design modules, to effect design changes when constraint violations occur. An example from structural design illustrates the methodology.

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