Cover Image

Hole-drilling method for measuring residual stresses /

Bibliographic Details
Main Authors: Schajer, Gary S. (Author), Whitehead, Philip S. (Author)
Corporate Author: Morgan & Claypool Publishers
Format: eBook
Language:English
Published: [San Rafael, California] : Morgan & Claypool, 2018.
Series:Synthesis SEM lectures on experimental mechanics ; # 1.
Synthesis digital library of engineering and computer science.
Subjects:
Drilling and boring.
Residual stresses > Measurement.
hole-drilling
inverse methods
optical metrology
residual stresses
strain gauges
stress measurement
Electronic books.
Online Access:Connect to the full text of this electronic book (PDF)
Table of Contents:
  • 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
  • 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
  • 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
  • 4. Strain gauge technique: method description
  • 4.1 Strain gauge rosette selection
  • 4.2 Specimen preparation
  • 4.3 Gauge installation
  • 4.4 Instrumentation and electrical connections
  • 4.5 Hole-drilling equipment
  • 4.6 Hole-drilling procedure
  • 4.7 Gauge data
  • 4.8 Further reading
  • 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
  • 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
  • 7. Optical techniques
  • 7.1 Introduction
  • 7.2 Holographic interferometry
  • 7.3 MoirĂ© 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
  • Authors' biographies
  • Index.