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Hole-drilling method for measuring residual stresses / Gary S. Schajer, Philip S. Whitehead

Von:

Schajer, Gary S [VerfasserIn]

Mitwirkende(r):

Whitehead, Philip S [VerfasserIn]

Resource type: Ressourcentyp: Buch (Online)Buch (Online)Sprache: Englisch Reihen: Synthesis SEM lectures on experimental mechanics ; #1Verlag: [San Rafael, California] : Morgan & Claypool Publishers, 2018Beschreibung: 1 Online-Ressource (xiv, 172 pages)Schlagwörter:

Andere physische Formen: 9781681732664 | 9781681732688 | 168173267X. | 9781681732671. | Erscheint auch als: 9781681732664 Druck-AusgabeDDC-Klassifikation:

620.1123

LOC-Klassifikation:

TA417.6

Online-Ressourcen:

Zugang im Netz des KIT

Zusammenfassung: 1. Nature and source of residual stresses -- 1.1 Introduction -- 1.2 Origin of residual stresses -- 1.3 Sources of residual stresses -- 1.3.1 Bulk component misfit in redundant structures -- 1.3.2 Non-uniform dimensional variations due to thermal effects -- 1.3.3 Non-uniform plastic deformation -- 1.3.4 Surface machining -- 1.3.5 Surface treatments -- 1.3.6 Chemical and phase change -- 1.4 Types of residual stresses -- 1.4.1 Residual stress type I -- 1.4.2 Residual stress type II -- 1.4.3 Residual stress type III -- 1.5 Effects of residual stress -- 1.6 Residual stress measurements -- 1.7 Further reading --Zusammenfassung: 2. Relaxation type residual stress measurement methods -- 2.1 Introduction -- 2.2 Relaxation method concept -- 2.3 Excision method -- 2.4 Two-groove method -- 2.5 Splitting method -- 2.6 Slitting (crack compliance) method -- 2.7 Ring-core method -- 2.8 Hole-drilling method -- 2.9 Deep-hole method -- 2.10 Layer-removal method -- 2.11 Contour method -- 2.12 Sectioning method -- 2.13 Impact of modern measurement technologies -- 2.14 Method selection -- 2.15 Further reading --Zusammenfassung: 3. Hole-drilling method concept and development -- 3.1 Introduction -- 3.2 Concept -- 3.3 Mathar's foundational work -- 3.4 Hole drilling -- 3.5 Deformation measurements -- 3.6 Ring-core method -- 3.7 Deep-hole drilling -- 3.8 Residual stress computations -- 3.9 Concluding remarks -- 3.10 Further reading --Zusammenfassung: 5. Stress computations -- 5.1 Introduction -- 5.2 Uniform residual stresses -- 5.3 Calibration constants -- 5.4 Stress averaging -- 5.5 Non-uniform residual stresses -- 5.6 Practical determination of a and b -- 5.7 Regularization -- 5.8 Other calculations -- 5.8.1 Differential strain and average stress methods -- 5.8.2 Power series method -- 5.8.3 Specimen thickness -- 5.8.4 Hole eccentricity correction -- 5.8.5 Plasticity effects -- 5.8.6 Orthotropic materials -- 5.9 Further reading --Zusammenfassung: 6. Example practical procedures and results -- 6.1 Specimen geometry and strain gauge selection details -- 6.2 Practical strain gauge rosette installations -- 6.3 Orientation of type B strain gauge rosettes -- 6.4 Installation on irregular surfaces: bond thickness -- 6.5 Non-standard gauges -- 6.6 Residual stress example: training sample (annealed disc) -- 6.7 Residual stress example: aluminium alloy block -- 6.8 Residual stress example: machined, forged disc -- 6.9 Residual stress example: surface process samples -- 6.10 Residual stress example: thin, shot-peened beam -- 6.11 Concluding remarks -- 6.12 Further reading --Zusammenfassung: 7. Optical techniques -- 7.1 Introduction -- 7.2 Holographic interferometry -- 7.3 Moiré interferometry -- 7.4 Electronic speckle pattern interferometry (ESPI) -- 7.5 Digital image correlation -- 7.6 Computation of uniform residual stresses -- 7.7 Computation of non-uniform residual stresses -- 7.8 Residual stress computation using incremental data -- 7.9 Concluding remarks -- 7.10 Further reading --Zusammenfassung: This book describes the theory and practice of the Hole-Drilling Method for measuring residual stresses in engineering components. Such measurements are important because residual stresses have a "hidden" character because they exist locked-in within a material, independent of any external load. These stresses are typically created during component manufacture, for example, during welding, casting, or forming. Because of their hidden nature, residual stresses are difficult to measure and consequently are often ignored. However, they directly add to loading stresses and can cause catastrophic failure if not properly included during engineering design.Thus, there is an urgent need to be able to identify and measure residual stresses conveniently and reliably. The Hole-Drilling Method provides an adaptable and well-proven method for measuring residual stresses in a wide range of materials and component types. It is convenient to use and gives reliable results. Because of the hidden nature of residual stresses, the measurement method must necessarily be indirect, thus, additional care and conceptual understanding are necessary to achieve successful results. This book provides a practical introduction to the Hole-Drilling Method, starting from its historical roots and going on to focus on its modern practice. The various chapters describe the nature of residual stresses, the principle of hole-drilling measurements, procedures and guidance on how to make successful measurements, and effective mathematical procedures for stress computation and analysis. The book is intended for practitioners who need to make residual stress measurements either occasionally or routinely, for practicing engineers, for researchers, and for graduate engineering and science studentsPPN: PPN: 1019023163Package identifier: Produktsigel: ZDB-4-NLEBK

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