Usage space analysis for reliability testing

During the development process of a complex technical product, one widely used and important technique is accelerated testing where the applied stress on a component is chosen to exceed the reference stress, i.e. the stress encountered in field operation, in order to reduce the time to failure. For...

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Bibliographic Details
Published in:	Quality and reliability engineering international Vol. 26; no. 8; pp. 877 - 885
Main Authors:	Haselgruber, Nikolaus, Mautner, Karin, Thiele, Jan
Format:	Journal Article
Language:	English
Published:	Chichester, UK John Wiley & Sons, Ltd 01-12-2010
Subjects:	accelerated testing Accelerated tests Combustion Compressed customer usage space Customers design of experiments Failure modes multivariate regression principal component analysis Scalars Stress concentration Stresses
Online Access:	Get full text
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Summary:	During the development process of a complex technical product, one widely used and important technique is accelerated testing where the applied stress on a component is chosen to exceed the reference stress, i.e. the stress encountered in field operation, in order to reduce the time to failure. For that, the reference stress has to be known. Since a complex technical product may fail regarding numerous failure modes, stress in general is highly dimensional rather than scalar. In addition, customers use their products individually, i.e. field operation should be described by a distribution rather than by one scalar stress value. In this paper, a way to span the customer usage space is shown. It allows the identification of worst case reference stress profiles in significantly reduced dimensions with minimal loss of information. The application example shows that even for a complex product like a combustion engine, stress information can be compressed significantly. With low measurement effort it turned out that only three reference stress cycles were sufficient to cover a broad range of customer stress variety. Copyright © 2010 John Wiley & Sons, Ltd.
Bibliography:	istex:87645A385BAD1392380E2209F241931A1DDAB0CA ArticleID:QRE1155 ark:/67375/WNG-60655W2G-R ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0748-8017 1099-1638 1099-1638
DOI:	10.1002/qre.1155