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Yann Ledoux

Bio: Yann Ledoux is an academic researcher from University of Bordeaux. The author has contributed to research in topics: Engineering design process & Design objective. The author has an hindex of 11, co-authored 40 publications receiving 348 citations. Previous affiliations of Yann Ledoux include Centre national de la recherche scientifique & Arts et Métiers ParisTech.

Papers
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Journal ArticleDOI
TL;DR: In this paper, an original procedure is proposed to systematically analyze and quantify the assembly of parts with form and position defects and deformable contact surfaces. But this procedure is based on the traditional assumption that surfaces have no form defects and are rigid under external loads.
Abstract: Tolerancing activity is usually based on the traditional assumptions that surfaces have no form defects and are rigid under external loads. These assumptions tend to simplify the tolerance analysis of mechanical assemblies and hence the allocation of geometrical specifications. The present paper proposes an original procedure to systematically analyze and quantify the assembly of parts with form and position defects and deformable contact surfaces. Based on this procedure, stochastic simulations are performed by modifying the ratio between the position defects and form defects of surfaces. Even if the form defects are limited, they can lead to a non-compliant assembly. Clearly, the engineer's traditional approach, where form defects are assumed to have no influence, is generally not appropriate if we are to ensure that the expected performance is to be achieved on assembly.

40 citations

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TL;DR: In this article, a complete approach starting from modeling and leading to the selection of robust optimal process parameters is proposed, where the search for optimal tool configurations is performed by optimizing a desirability function and by means of a genetic algorithm based optimization code.

38 citations

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TL;DR: In this paper, the role of surface defects on static flat seal efficiency is investigated on synthetic "turned-like" surfaces generated by combinations of the first 50 vibrational eigen modes determined from modal discrete decomposition.

38 citations

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TL;DR: The development of a multi-objective optimization method is investigated for the joint optimization of design objectives such as process transportability, environmental efficiency, operative cost or cooling power.

30 citations

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TL;DR: This special issue focuses on advances in design heuristics, numerical methods inspired by nature (genetic algorithms, simulated annealing, particle swarms, etc.), Monte Carlo or stochastic methods and Constraint Programming for design applications.

25 citations


Cited by
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TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

13,333 citations

28 Sep 2014
TL;DR: This paper presents an experimental study of parameter design and tolerance design for dynamic characteristics in the context of Offline and online quality control.
Abstract: Contents: Variety and Quality. Variability loss and tolerance. Determining tolerances. Tolerance design and experimental design. Offline and online quality control. Parameter design and tolerance design: case study. Experimental design for smaller is better characteristics. Experimental design for larger is better characteristics. Bypassing the S/N ratio: spring experiment. Experimental design for dynamic characteristics.

672 citations

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TL;DR: This paper summarizes the most recent advances in the studies of the monomeric anthocyanins in red wines, emphasizing their origin, occurrence, color enhancing effects, their degradation and the effect of various enological practices on them.
Abstract: Originating in the grapes, monomeric anthocyanins in young red wines contribute the majority of color and the supposed beneficial health effects related to their consumption, and as such they are recognized as one of the most important groups of phenolic metabolites in red wines In recent years, our increasing knowledge of the chemical complexity of the monomeric anthocyanins, their stability, together with the phenomena such as self-association and copigmentation that can stabilize and enhance their color has helped to explain their color representation in red wine making and aging A series of new enological practices were developed to improve the anthocyanin extraction, as well as their color expression and maintenance This paper summarizes the most recent advances in the studies of the monomeric anthocyanins in red wines, emphasizing their origin, occurrence, color enhancing effects, their degradation and the effect of various enological practices on them

301 citations

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TL;DR: In this article, the authors explored the design issue of thin-walled bitubal column structures filled with aluminum foam, which can increase crashworthiness without sacrificing too much weight.

163 citations

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TL;DR: This work develops a semantic and theoretical framework and proposes a new system for organizing and designating multiscale analyses and characterizations of surface topographies from the engineering and scientific literature with an emphasis on production engineering research and design.
Abstract: This work studies multiscale analyses and characterizations of surface topographies from the engineering and scientific literature with an emphasis on production engineering research and design It highlights methods that provide strong correlations between topographies and performance or topographies and processes, and methods that can confidently discriminate topographies that were processed or that perform differently These methods have commonalities in geometric characterizations at certain scales, which are observable with statistics and measurements It also develops a semantic and theoretical framework and proposes a new system for organizing and designating multiscale analyses Finally, future possibilities for multiscale analyses are discussed

125 citations