Teaching Multiple Approaches to Engineering Design Within a Unified Curriculum

2010 ◽  
Author(s):  
Robert L. Nagel ◽  
Kerry Poppa ◽  
Robert B. Stone
Keyword(s):  
Problem Solving ◽  
Engineering Design ◽  
Integrated Curriculum ◽  
Systematic Approach ◽  
Design Method ◽  
Design Methods ◽  
Design Approach ◽  
General Definition ◽  
General Description ◽  
General Design

This paper presents a comparison on four different, yet complimentary, design methods: (1) Pahl and Beitz’s Systematic Approach to Design, (2) Suh’s Axiomatic Design, (3) Altshuller’s Theory of Inventive Problem Solving and (4) Ulwick’s Outcome-Driven Method. To compare these approaches to design, a general definition and process for design is first derived from common engineering design texts. After a general description of each of these design approaches is presented, a comparison is made between each design approach and the general design method. The paper is concluded with the proposal of an integrated curriculum for teaching the methods within the scope of a single design course.

Study on Integrated Design Method Based on AD, QFD, TRIZ and Taguchi Method

2010 ◽  
Vol 37-38 ◽  
pp. 1301-1305 ◽  
Author(s):  
Guo Qing Sun ◽  
Guan Wei Zhang ◽  
Yong Liang Chen ◽  
Kun Zhang
Keyword(s):  
Problem Solving ◽  
Taguchi Method ◽  
Design Method ◽  
Integrated Design ◽  
Axiomatic Design ◽  
Design Methods ◽  
Design Model ◽  
Advantages And Disadvantages ◽  
Cutting Machine ◽  
Quality Function Development

Based on study and analysis of the advantages and disadvantages of the design methods of AD (AD, Axiomatic Design), QFD (QFD, Quality Function Development), TRIZ (TRIZ, Theory of Inventive Problem Solving) and Taguchi Method, the article established the integrated design model of the four. Taking the design of a compressor cutting machine as example, the article analyzed how to design the machine under the guidance of the integrated design method based on AD-QFD-TRIZ and Taguchi Method according to the actual needs of users. Thus, the article provides a useful reference for the design of related products to designers.

A Conceptual Design Approach Generated by Integrating AD and TRIZ into the Conceptual Design Phase of SAPB

2010 ◽  
Vol 118-120 ◽  
pp. 977-981
Author(s):  
Xiang Zhang ◽  
De Zhi Chen
Keyword(s):  
Problem Solving ◽  
Conceptual Design ◽  
Systematic Approach ◽  
Axiomatic Design ◽  
Design Approach ◽  
Independence Axiom ◽  
Design Phase ◽  
Conceptual Design Phase

This paper analyzes the advantages and shortages of Systematic Approach of Pahl and Beitz (SAPB), Axiomatic Design (AD) and Theory of Inventive Problem Solving (TRIZ), and explores the possibilities of integration of complementary advantages as well. Integrate the Independence Axiom from AD and the principles of resolving contradictions into the conceptual design phase of SAPB, and at last, generate an approach of conceptual design.

Evaluating the Directed Intuitive Approach for Bioinspired Design

2014 ◽  
Vol 136 (7) ◽  
Author(s):  
Michael W. Glier ◽  
Joanna Tsenn ◽  
Julie S. Linsey ◽  
Daniel A. McAdams
Keyword(s):  
Engineering Design ◽  
Design Method ◽  
Idea Generation ◽  
Design Methods ◽  
Design Knowledge ◽  
Design Problems ◽  
Bioinspired Design ◽  
Engineering Problems ◽  
Novice Designers ◽  
The Impact

Bioinspired design, the practice of looking to nature to find inspiration for solutions to engineering problems, is increasingly a desired approach to design. It allows designers to tap a wealth of time-tested solutions to difficult problems in a domain less considered by designers. Only recently have researchers developed organized, systematic methods for bioinspired design. Traditionally, bioinspired design has been conducted without the benefit of any organized method. Designers relied on the informal “directed intuitive approach” of bioinspired design, which simply directs designers to consider how nature might solve a problem. This paper presents an experiment to explore the impact of the directed approach on idea generation. This experiment is foundationally important to bioinspired engineering design method research. The results of this experiment serve as a fundamental baseline and benchmark for the comparison of more systematic, and often more involved, bioinspired design methods. A group of 121 novice designers are given one of two design problems and instructed to either generate solutions using the directed approach or to generate solutions without being prompted in any additional fashion. Based on the findings presented here, the directed approach offers designers no advantage in the average number of nonredundant ideas, quality, novelty, or variety of the solutions produced. In conclusion, systematic and organized methods for bioinspired design should be sought to effectively leverage nature's design knowledge.

Design Method for Conformal Lattice-Skin Structure Fabricated by AM Technologies

2016 ◽  
Author(s):  
Yunlong Tang ◽  
Sheng Yang ◽  
Yaoyao Fiona Zhao
Keyword(s):  
Complex Geometry ◽  
Design Method ◽  
Mapping Function ◽  
Design Guidelines ◽  
Design Methods ◽  
Design Stage ◽  
Lattice Structures ◽  
Skin Structure ◽  
General Design ◽  
Geometry Model

Parts with complex geometry can be produced by additive manufacturing processes without a significant increase in fabrication time and cost. One application of AM technologies is to fabricate customized lattice-skin structures which can enhance the functional performance of products with less material and less weight. In this paper, a brief comparison between different types of lattice structures and their related design methods has been done. The result shows that conformal lattice structures may perform better than other types of lattice due to its unique configuration for some design cases. However, most existing design methods of conformal lattice have a limitation to deal with complex external geometry. To solve this issue and fully utilize conformal lattice structures, a general design method for a conformal lattice-skin structure is proposed. This design method consists of two major design stages. At the beginning design stage, conformal surfaces are selected based on proposed general design guidelines. Then two different lattice frame generation methods are provided to generate conformal lattice to fit the selected conformal surfaces. A comparison between these two methods is made to help designers select a suitable method for their design cases. In the second design stage, the thickness of each lattice strut is calculated based on a defined mapping function. This mapping function generally considers two important factors from the result of topology optimization. They are optimal relative density distribution and its related principle stress direction. Based on the calculated strut’s thickness, the geometry model of heterogeneous conformal lattice can be generated. At the end of the design process, skin structures can be added on the generated heterogeneous conformal lattice. To further illustrate and validate the proposed design method, a design case of handle connector is provided. The result of this case study shows this method can provide an efficient tool for designers to generate the conformal lattice-skin structure for a complex external shape.

scholarly journals Teaching and Learning Design Methods: Facing the Related Issues with TRIZ

2019 ◽  
Vol 1 (1) ◽  
pp. 589-598
Author(s):  
Lorenzo Fiorineschi ◽  
Francesco Saverio Frillici ◽  
Federico Rotini
Keyword(s):  
Problem Solving ◽  
Conceptual Design ◽  
Teaching And Learning ◽  
Design Method ◽  
Learning Experience ◽  
Design Methods ◽  
Learning Design ◽  
Professional Careers

AbstractDesign methods are claimed to support designers but, although they are largely taught in academia, their industrial uptake is still lacking. Many reasons have been identified about this flaw and some potential suggestions have been proposed and discussed in literature to overcome the problem. However, a further evidence is that although many students learn such methods from years, they partially or totally abandon the learned methods in their professional careers. This could partially explain the gap between academic and industrial diffusion of design methods. Literature provides suggestions for improving the learning experience of students but different didactical contexts may need more tailored solutions. The work shown in this paper exploits the problem solving potentialities of the TRIZ toolset to provide hints for improving a course focused on teaching a systematic conceptual design method. A set of suggestions has been obtained together some guidelines for applying the considered TRIZ tools to other didactical contexts.

An Update on Improved Flange Design Methods

2007 ◽  
Author(s):  
Warren Brown
Keyword(s):  
Design Method ◽  
Design Methods ◽  
Project Development ◽  
Design Improvement ◽  
Panel Session ◽  
Improved Methods ◽  
Made In

This paper details further progress made in the PVRC project “Development of Improved Flange Design Method for the ASME VIII, Div.2 Rewrite Project” presented during the panel session on flange design at the 2006 PVP conference in Vancouver. The major areas of flange design improvement indicated by that project are examined and the suggested solutions for implementing the improved methods into the Code are discussed. Further analysis on aspects such as gasket creep and the use of leakage-based design has been conducted. Shortcomings in the proposed ASME flange design method (ASME BFJ) and current CEN flange design methods (EN-1591) are highlighted and methods for resolution of these issues are suggested.

Impact of Secondary Flow on the Accuracy of Simplified Design Methods for Steam Turbine Stages

2012 ◽  
Author(s):  
Jan Schumann ◽  
Ulrich Harbecke ◽  
Daniel Sahnen ◽  
Thomas Polklas ◽  
Peter Jeschke ◽  
...  
Keyword(s):  
Secondary Flow ◽  
Steam Turbine ◽  
Design Process ◽  
Design Method ◽  
Computing Time ◽  
Leading Edge ◽  
Design Methods ◽  
Preliminary Design ◽  
Line Design ◽  
Radial Equilibrium

The subject of the presented paper is the validation of a design method for HP and IP steam turbine stages. Common design processes have been operating with simplified design methods in order to quickly obtain feasible stage designs. Therefore, inaccuracies due to assumptions in the underlying methods have to be accepted. The focus of this work is to quantify the inaccuracy of a simplified design method compared to 3D Computational Fluid Dynamics (CFD) simulations. Short computing time is very convenient in preliminary design; therefore, common design methods work with a large degree of simplification. The origin of the presented analysis is a mean line design process, dealing with repeating stage conditions. Two features of the preliminary design are the stage efficiency, based on loss correlations, and the mechanical strength, obtained by using the beam theory. Due to these simplifications, only a few input parameters are necessary to define the primal stage geometry and hence, the optimal design can easily be found. In addition, by using an implemented law to take the radial equilibrium into account, the appropriate twist of the blading can be defined. However, in comparison to the real radial distribution of flow angles, this method implies inaccuracies, especially in regions of secondary flow. In these regions, twisted blades, developed by using the simplified radial equilibrium, will be exposed to a three-dimensional flow, which is not considered in the design process. The analyzed design cases show that discrepancies at the hub and shroud section do exist, but have minor effects. Even the shroud section, with its thinner leading-edge, is not vulnerable to these unanticipated flow angles.

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