Description of the Counting Methods
In the following, the most important counting methods applied for fatigue strength calculation are described and assessed. Recommendations are given for application.
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ad Assumption for Fatigue Design of Structures and Components Counting Methods, Safety Aspects, Practical Application
Load Assumption for Fatigue Design of Structures and Components
Michael K€ohler • Sven Jenne • Kurt P€otter • Harald Zenner
Load Assumption for Fatigue Design of Structures and Components Counting Methods, Safety Aspects, Practical Application
Michael K€ohler Mercedes-AMG GmbH Germany
Sven Jenne Gutehoffnungshütte Radsatz GmbH Germany
Kurt P€otter BMW Group Germany
Harald Zenner TU Clausthal (em.) Germany
ISBN 978-3-642-55247-2 ISBN 978-3-642-55248-9 DOI 10.1007/978-3-642-55248-9
(eBook)
Library of Congress Control Number: 2017936145 Translation from the German language edition: Za¨hlverfahren und Lastannahme in der Betriebsfestigkeit. © Springer-Verlag Berlin Heidelberg 2012. © Springer-Verlag GmbH Germany 2017 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Printed on acid-free paper This Springer imprint is published by Springer Nature The registered company is Springer-Verlag GmbH Germany The registered company address is: Heidelberger Platz 3, 14197 Berlin, Germany
Preface
The strength assessment for structural components constitutes a comparison between the occurring stress and allowable stress (the capacity to withstand loads). The capacity of a structural component to withstand loads must be higher than the stress which occurs in operation, including a certain safety factor. For the certification of fatigue life under variable load amplitude, the use of simple characteristic values, such as static strength characteristics, is not sufficient. For this purpose, characteristic functions are necessary for describing the load and capacity to withstand loads. For the load, this function is a frequency distribution of the amplitudes, that is, a load spectrum or load matrix. For the capacity to withstand loads, the function can be
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