Behavior Of Surface And Corner Cracks Subjected To Tensile And Bending Loads In Ti 6al 4v Alloy
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Behavior Of Surface And Corner Cracks Subjected To Tensile And Bending Loads In Ti 6al 4v Alloy
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Author :
language : en
Publisher:
Release Date : 1990
Behavior Of Surface And Corner Cracks Subjected To Tensile And Bending Loads In Ti 6al 4v Alloy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Modelling Of Crack Growth In Single Crystal Nickel Base Superalloys
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Author : Christian Busse
language : en
Publisher: Linköping University Electronic Press
Release Date : 2019-09-24
Modelling Of Crack Growth In Single Crystal Nickel Base Superalloys written by Christian Busse and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-24 with categories.
This dissertation was produced at the Division of Solid Mechanics at Linköping University and is part of a research project, which comprises modelling, microstructure investigations and material testing of cast nickel-base superalloys. The main objective of this work was to deepen the understanding of the fracture behaviour of single-crystal nickel-base superalloys and to develop a model to predict the fatigue crack growth behaviour. Frequently, crack growth in these materials has been observed to follow one of two distinct cracking modes; Mode I like cracking perpendicular to the loading direction or crystallographic crack growth on the octahedral {111}-planes, where the latter is associated with an increased fatigue crack growth rate. Thus, it is of major importance to account for this behaviour in component life prediction. Consequently, a model for the prediction of the transition of cracking modes and the correct active crystallographic plane, i.e. the crack path, and the crystallographic crack growth rate has been developed. This model is based on the evaluation of appropriate crack driving forces using three-dimensional finite-element simulations. A special focus was given towards the influence of the crystallographic orientation on the fracture behaviour. Further, a model to incorporate residual stresses in the crack growth modelling is presented. All modelling work is calibrated and validated by experiments on different specimen geometries with different crystallographic orientations. This dissertation consists of two parts, where Part I gives an introduction and background to the field of research, while Part II consists of six appended papers. Die vorliegende Dissertation wurde in der Abteilung für Festigkeitslehre an der Universität von Linköping erstellt und ist Teil eines Forschungsprojektes, welches Modellierung, Mikrostrukturuntersuchungen und Materialtests von gegossenen nickelbasierten Superlegierungen umfasst. Das Hauptziel dieser Arbeit war es, das Verständnis des Bruchverhaltens von einkristallinen Superlegierungen auf Nickelbasis zu vertiefen und ein Modell zur Vorhersage des Wachstumsverhaltens von Ermüdungsrissen zu entwickeln. Es wurde beobachtet, dass das Risswachstum in diesen Materialien einem von zwei unterschiedlichen Rissmodi folgt; Modus I Rissfortschritt senkrecht zur Belastungsrichtung oder kristallographisches Risswachstum auf den oktaedrischen f111g-Ebenen, wobei letzteres mit einer erhöhten Ermüdungsrisswachstumsrate verbunden ist. Somit ist es von grosser Bedeutung dieses Verhalten in der Lebensdauervorhersage einer Komponente zu berücksichtigen. Demzufolge wurde ein Modell für die Vorhersage des Übergangs zwischen den Rissmodi und der korrekten aktiven kristallographischen Ebene, d.h. des Risspfades, sowie der kristallographischen Risswachstumsrate erarbeitet. Dieses Modell basiert auf geeigneten Rissantriebskräften, welche mit Hilfe dreidimensionaler Finite-Elemente-Simulationen berechnet werden. Im Fokus stand insbesondere der Einuss der kristallographischen Orientierung auf das Bruchverhalten. Ausserdem wird ein Modell zur Berücksichtigung von Restspannungen in der Risswachstumsmodellierung präsentiert. Alle Modellierungsarbeiten wurden durch Experimente an verschiedenen Probengeometrien mit unterschiedlichen kristallographischen Orientierungen kalibriert und validiert. Diese Dissertation besteht aus zwei Teilen, wobei Teil I aus einer Einführung und einem Hintergrund in das Forschungsgebiet und Teil II aus sechs beigefügten Forschungsartikeln besteht.
Structural Integrity Of Fasteners
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Author : Pir M. Toor
language : en
Publisher: ASTM International
Release Date : 1995
Structural Integrity Of Fasteners written by Pir M. Toor and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Fasteners categories.
Mechanics Microstructure Corrosion Coupling
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Author : Christine Blanc
language : en
Publisher: Elsevier
Release Date : 2019-02-19
Mechanics Microstructure Corrosion Coupling written by Christine Blanc and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-19 with Technology & Engineering categories.
Mechanics - Microstructure - Corrosion Coupling: Concepts, Experiments, Modeling and Cases presents the state-of-the-art on scientific and technological developments relating to the durability of materials and structures subjected to mechanical and environmental stress in industries such as energy, aeronautics, chemistry and oil. Experimental, theoretical and numerical aspects are tackled at different scales, providing readers with the most advanced tools and scientific approaches to apprehend coupling phenomena by understanding associated mechanisms, identifying variables of the first order, and proposing strategies to control and/or extend the lifespan of structures in a multi-process coupling situation. In addition, the book presents the latest advances in research in these areas (hydrogen embrittlement, stress corrosion, fatigue, etc.), especially in the consideration of the multi-scale aspect of the phenomena in the implementation of dedicated experiments. Reviews the status of scientific and technological developments related to the durability of materials Addresses experimental, theoretical and numerical aspects at different scales Provides the most advanced tools and scientific approaches Focuses on the latest advances, such as hydrogen embrittlement, stress corrosion, fatigue, and more
Fracture Mechanics Of Metals Composites Welds And Bolted Joints
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Author : Bahram Farahmand
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Fracture Mechanics Of Metals Composites Welds And Bolted Joints written by Bahram Farahmand and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
In the preliminary stage of designing new structural hardware to perform a given mission in a fluctuating load environment, there are several factors that the designer should consider. Trade studies for different design configurations should be performed and, based on strength and weight considerations, among others, an optimum configuration selected. The selected design must withstand the environment in question without failure. Therefore, a comprehensive structural analysis that consists of static, dynamic, fatigue, and fracture is necessary to ensure the integrity of the structure. Engineers must also consider the feasibility of fabricating the structural hardware in the material selection process. During the past few decades, fracture mechanics has become a necessary discipline for the solution of many structural problems in which the survivability of structure containing pre-existing flaws is of great interest. These problems include structural failures resulting from cracks that are inherent in the material, or defects that are introduced in the part due to improper handling or rough machining, that must be assessed through fracture mechanics concepts.
Fracture Mechanics
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Author : Ted L. Anderson
language : en
Publisher: CRC Press
Release Date : 2005-06-24
Fracture Mechanics written by Ted L. Anderson and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-06-24 with Science categories.
With its combination of practicality, readability, and rigor that is characteristic of any truly authoritative reference and text, Fracture Mechanics: Fundamentals and Applications quickly established itself as the most comprehensive guide to fracture mechanics available. It has been adopted by more than 100 universities and embraced by thousands of professional engineers worldwide. Now in its third edition, the book continues to raise the bar in both scope and coverage. It encompasses theory and applications, linear and nonlinear fracture mechanics, solid mechanics, and materials science with a unified, balanced, and in-depth approach. Reflecting the many advances made in the decade since the previous edition came about, this indispensable Third Edition now includes: A new chapter on environmental cracking Expanded coverage of weight functions New material on toughness test methods New problems at the end of the book New material on the failure assessment diagram (FAD) method Expanded and updated coverage of crack closure and variable-amplitude fatigue Updated solutions manual In addition to these enhancements, Fracture Mechanics: Fundamentals and Applications, Third Edition also includes detailed mathematical derivations in appendices at the end of applicable chapters; recent developments in laboratory testing, application to structures, and computational methods; coverage of micromechanisms of fracture; and more than 400 illustrations. This reference continues to be a necessity on the desk of anyone involved with fracture mechanics.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1991
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Aeronautics categories.
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Statistical Inference For Piecewise Deterministic Markov Processes
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Author : Romain Azais
language : en
Publisher: John Wiley & Sons
Release Date : 2018-07-31
Statistical Inference For Piecewise Deterministic Markov Processes written by Romain Azais and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-31 with Mathematics categories.
Piecewise-deterministic Markov processes form a class of stochastic models with a sizeable scope of applications: biology, insurance, neuroscience, networks, finance... Such processes are defined by a deterministic motion punctuated by random jumps at random times, and offer simple yet challenging models to study. Nevertheless, the issue of statistical estimation of the parameters ruling the jump mechanism is far from trivial. Responding to new developments in the field as well as to current research interests and needs, Statistical inference for piecewise-deterministic Markov processes offers a detailed and comprehensive survey of state-of-the-art results. It covers a wide range of general processes as well as applied models. The present book also dwells on statistics in the context of Markov chains, since piecewise-deterministic Markov processes are characterized by an embedded Markov chain corresponding to the position of the process right after the jumps.
High Entropy Materials Theory Experiments And Applications
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Author : Jamieson Brechtl
language : en
Publisher: Springer Nature
Release Date : 2022-01-03
High Entropy Materials Theory Experiments And Applications written by Jamieson Brechtl and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-03 with Technology & Engineering categories.
This book discusses fundamental studies involving the history, modelling, simulation, experimental work, and applications on high-entropy materials. Topics include data-driven and machine-learning approaches, additive-manufacturing techniques, computational and analytical methods, such as density functional theory and multifractal analysis, mechanical behavior, high-throughput methods, and irradiation effects. The types of high-entropy materials consist of alloys, oxides, and ceramics. The book then concludes with a discussion on potential future applications of these novel materials.
Icaf 2019 Structural Integrity In The Age Of Additive Manufacturing
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Author : Antoni Niepokolczycki
language : en
Publisher: Springer
Release Date : 2019-07-03
Icaf 2019 Structural Integrity In The Age Of Additive Manufacturing written by Antoni Niepokolczycki and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-07-03 with Technology & Engineering categories.
This book gathers papers presented at the 36th conference and 30th Symposium of the International Committee on Aeronautical Fatigue and Structural integrity. Focusing on the main theme of “Structural Integrity in the Age of Additive Manufacturing”, the chapters cover different aspects concerning research, developments and challenges in this field, offering a timely reference guide to designers, regulators, manufacturer, and both researchers and professionals of the broad aerospace community.