Design for X Approach to Optimise a Formula SAE Car

Volume 2 ◽  
2004 ◽  
Author(s):  
Renzo Capitani ◽  
Tommaso Iacomelli ◽  
Daniele G. Rosti ◽  
Pierluigi Tozzi
Keyword(s):  
Experimental Data ◽  
Integrated Approach ◽  
Design For Manufacturing ◽  
Cnc Machining ◽  
Recursive Method ◽  
Multibody Simulation ◽  
Design For X ◽  
Formula Sae ◽  
Class 1

The Universita` degli Studi di Firenze joined the Formula Student competition (organised by SAE and IMechE) in 2002 competing in Class 3, the following year the first car was ready to compete in Class 1. In order to build this car, an integrated approach was adopted to obtain the best solution in every aspect. The purpose of the design was to optimise the car handling, fulfilling the Formula SAE rules. All the design phases were based on the Design for X approach, with the aim to optimise all the aspects of the Formula SAE project, like performance, design and cost. A Design for Manufacturing approach was added to the FEA to design all the components, like uprights and wheel spindles, in order to simplify the CNC machining. The suspensions layout was defined using a recursive method based on the Multibody Simulation and the components design. Some experimentations were conducted to verify the simulations. The experimental data were used to start the redesign, to improve the performance of the new car that will compete in the 2004 events.

scholarly journals An approach to determine enthalpies of formation for ternary compounds

2010 ◽  
Vol 46 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Y. Du ◽  
J. Wang ◽  
Y.F. Ouyang ◽  
L.J. Zhang ◽  
Z.H. Yuan ◽  
...  
Keyword(s):  
Experimental Data ◽  
First Principles ◽  
Integrated Approach ◽  
Enthalpies Of Formation ◽  
Calphad Approach ◽  
Miedema Model ◽  
Theoretical Computation ◽  
Ternary Compounds ◽  
Data Yield ◽  
Experimental Values

An integrated approach of experiment and theoretical computation to acquire enthalpies of formation for ternary compounds is described. The enthalpies of formation (DHf ) for Al71Fe19Si10 and Al31Mn6Ni2 are measured via a calorimeter. Miedema model, CALPHAD and first-principles method are employed to calculate DHf for the above compounds and several Al-based ternary compounds. It is found that first-principles generated data yield good agreements with experimental values and thus can be used as key 'experimental data', which are needed for CALPHAD approach.

A New Integrated Design and Fabrication Process for Profiled Edge Laminae (PEL) Tooling

2005 ◽  
Author(s):  
Daniel F. Walczyk ◽  
Seungryeol Yoo
Keyword(s):  
Large Scale ◽  
Integrated Design ◽  
Thick Layer ◽  
Integrated Approach ◽  
Cnc Machining ◽  
Abrasive Waterjet ◽  
Surface Finishing ◽  
Small Scale ◽  
Extensive Surface ◽  
Critical Components

Profiled Edge Laminae (PEL) tooling is a thick-layer Rapid Tooling (RT) method that was developed a decade ago. Even with demonstrable advantages for large-scale tool applications over conventional CNC-machining of a solid billet and other commercially available RT methods, PEL tooling has not seen widespread use by industry because prior research related to laminated tooling has (1) focused on small-scale tools and perpendicular laser-cutting that required extensive surface finishing, and (2) there is no integrated and practical design and fabrication approach to tooling development. This paper describes a more streamlined and integrated approach to PEL tooling development, called the PEL Process, that builds upon prior work in this area. Critical components of the process that are described in detail include how to obtain lamina slicing information directly from a CAD model of the intended tool surface, how to measure dimensional errors between the PEL and CAD tool surfaces, and improved Abrasive Waterjet cutting trajectory and laminae slicing algorithms. The PEL Process is then demonstrated for the design and fabrication of aluminum PEL tooling used for hydroforming aircraft sheet metal components.

A Review of Design for X Methods for Medical Devices: The Introduction of a Design for FDA Approach

2011 ◽  
Author(s):  
Lourdes A. Medina ◽  
Richard A. Wysk ◽  
Gu¨l E. Okudan Kremer
Keyword(s):  
Medical Device ◽  
Drug Administration ◽  
Medical Devices ◽  
Development Process ◽  
Regulatory Compliance ◽  
Design For Manufacturing ◽  
Design For X ◽  
Device Development ◽  
Unites States ◽  
Fda Regulations

This paper focuses on the importance of the regulations, in particular the Food and Drug Administration (FDA), in the development of medical devices. The FDA regulates medical devices to assure that these products are safe and effective before their release into the Unites States market. We introduce the concept of Design for FDA (DfFDA) and describe DfFDA guidelines for medical device development. While many researchers describe the regulations in the form of reviews and models, the literature to date has not reported a DfFDA method. Here, DfFDA is proposed as a method to be used in parallel with other DfX methods when applicable. The DfX methods identified include: Design for Validation (DfV), Design for Reliability (DfR), Design for Quality (DfQ), Design for Manufacturing (DfM), Design for Assembly (DfA) and Design for Usability (DfU). This paper also reviews the literature addressing the FDA regulations and DfX methods, and an overview of the FDA regulations is presented. DfFDA is developed to increase awareness about regulatory compliance and promote designers to consider the regulations throughout the development process of medical devices.

scholarly journals Mathematical and Trade Based Optimization : "Synthetic" Method and Three Industrial Cases

2021 ◽  
Vol 15 ◽  
pp. 7-13
Author(s):  
Yvon Gardan Crestic ◽  
Nicolas Gardan
Keyword(s):  
Design Optimization ◽  
Optimization Design ◽  
Functional Performance ◽  
Integrated Approach ◽  
Linear Process ◽  
Point Of View ◽  
Functional Design ◽  
Manufacturing Costs ◽  
Design For X ◽  
The Third

The linear process of design-engineeringmanufacturing is nowadays obsolete. Even DFX (Design For X) methodologies are often replaced by Simulation for XFD (X being also Design) approaches. Optimization is also often applied before design. For instance, engineering design optimization of mechanical structures is nowadays essential in the mechanical industry (automotive, aeronautics ...). But optimizing mechanical structures cannot be efficient without taking in account other phases of the design-manufacturing process. In some cases, optimization is only based on trade kwnowledge. Engineers must then design parts or assemblies that are a better compromise, between mechanical and functional performance, weight, manufacturing costs etc. In this paper, after giving an overview on the different disciplines in design optimization of mechanical structures, we propose some trends to take into account the trade knowledge in the optimization/design phases. We propose an integrated approach to optimization in a functional design process with a methodological point of view. We present three different industrial cases of optimization on three examples : one in mechanical structures optimization, on based only on trade knowledge and the third mixing calculus and knowledge

Development of a Design for Manufacturing Rules Database for Use in Instruction of DFM Practices

2014 ◽  
Author(s):  
Keith Phelan ◽  
Crystal Wilson ◽  
Joshua D. Summers
Keyword(s):  
Engineering Design ◽  
Design Process ◽  
Design For Manufacturing ◽  
Design Practice ◽  
Design For X ◽  
Database Model ◽  
Engineering Design Process ◽  
Modern Engineering ◽  
Future Work ◽  
Is Design

In recent years, there has been a significant push towards “Design for X” (DFX) in modern engineering design practice. One such category that has received a large amount of attention is design for manufacturing. When conducting design for manufacturing, a common tool to assist in the design process is design for a series of design for manufacturing guidelines. While the use of these guidelines, as well as other DFX guidelines, has been shown to be effective, little research has been done with the intent to standardize the guidelines or make them more readily available. In this paper, the authors propose a Design for Manufacturing database tool to assist in the instruction of design for manufacturing guidelines. The development of the database model is discussed, as well as the interface that is used to interact with the database. The tool is then evaluated and conclusions are made with regards to the effectiveness of the database and any future work to increase the functionality. One major addition that is discussed is the adaptation of the database for use in industry, and not just in education, to assist in the engineering design process.

CNC Machining of Propeller to Better than Class Tolerances

2015 ◽  
Author(s):  
Slobodan (Bodo) Gospodnetic
Keyword(s):  
High Precision ◽  
Integrated Approach ◽  
Water Jet ◽  
Cnc Machining ◽  
Extreme Surface ◽  
Computer Numerically Controlled ◽  
Surface Blending ◽  
Propeller Blades ◽  
Better Than

Producing class S propellers and water jet impellers presents serious challenges for propeller manufacturers. To overcome these challenges and consistently manufacture propellers with superior quality, an integrated approach was adopted when developing and implementing a process for Computer Numerically Controlled (CNC) machining of propeller surfaces. Highlights of this process are: (1) CNC machining of all blade surfaces; extreme surface blending, (2) CNC machining to final form & finish without hand grinding and (3) high precision, better than class S. This paper will describe various challenges encountered in the production of CP propeller blades and how these challenges were overcome in order to produce accurate CP propeller blades which exceed class S tolerances.

Pullout capacity of slab anchors in sand

1989 ◽  
Vol 26 (3) ◽  
pp. 385-400 ◽  
Author(s):  
S. Frydman ◽  
I. Shaham
Keyword(s):  
Experimental Data ◽  
Key Words ◽  
Field Tests ◽  
Integrated Approach ◽  
Theoretical Expression ◽  
Width Ratio ◽  
Pullout Capacity ◽  
Dense Sand ◽  
Pullout Tests ◽  
Small Models

The pullout capacity of slab anchors in homogeneous sand depends on several factors including the type and density of the sand, and the depth, size, inclination, and shape of the slab. Although numerous publications have reported results of pullout tests on small models and prototypes, the investigations described have generally been limited to a study of the effects of one or two of the above factors, and no attempt has been made to develop an integrated approach to the problem. This paper presents such an approach by reanalyzing the results of published experimental data as well as those of a series of pullout tests performed on prototype slabs placed at various inclinations and depths in a dense sand profile. A simple theoretical expression is found to reasonably predict the pullout capacity of a continuous, horizontal slab as a function of depth-to-width ratio. Factors to account for shape, and inclination, are then established leading to expressions for the estimation of pullout capacity of any slab anchor. Key words: anchors, field tests, model tests, pullout capacity, sand, slabs, plates.

Challenges in Modeling Flexible Bodies based on Experimental Data with Utilization in Elastic Multibody Simulation

PAMM ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. 153-154 ◽  
Author(s):  
Claudius Lein ◽  
Michael Beitelschmidt ◽  
Johannes Woller
Keyword(s):  
Experimental Data ◽  
Multibody Simulation ◽  
Flexible Bodies
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