Experimental Method for Residual Stress Evaluation Through the Thickness of a Plate

2002 ◽  
Vol 124 (4) ◽  
pp. 428-433 ◽  
Author(s):  
Lars Fuglsang Andersen
Keyword(s):  
Residual Stress ◽  
Experimental Method ◽  
Plate Thickness ◽  
Hole Drilling ◽  
Calculation Error ◽  
Thick Plates ◽  
Stress Evaluation ◽  
Stress Calculation ◽  
Incremental Hole Drilling ◽  
Drilling Technique

In the present work an experimental method is developed for residual stress evaluation in medium thick plates. On the basis of the incremental hole-drilling technique, a method to resolve the in-plane residual stresses through the plate thickness is given. An analysis of the hole-drilling configuration is carried out, resulting in a configuration which optimizes the stress calculation accuracy. Moreover, it is estimated that conventional milling can be applied without affecting the accuracy of the method. Finally, the results of a comprehensive stress calculation error analysis are presented.

An Advanced Residual Stress Determination for 3D Cylinder Structure

2005 ◽  
Vol 490-491 ◽  
pp. 62-66 ◽  
Author(s):  
Jian Luo ◽  
Guillaume Montay ◽  
Jian Lu
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Hole Drilling ◽  
Stress Determination ◽  
Residual Stress Determination ◽  
Incremental Hole Drilling ◽  
Drilling Technique ◽  
The Relationship ◽  
Calibration Coefficients

For measuring in-depth residual stress in 3D cylinder structure easily in this paper, the semi-destructive incremental hole drilling technique combined with finite element method is used, the calibration coefficients of 3D cylinder components are calculated, and the relationship between strain and stress is determined, the changes of calibration coefficients are analysed, the residual stress of one steering joint of automobile is measured, and the errors of residual stress are discussed.

A Computational Method of Residual Stress Calculation for Incremental Hole-Drilling Method Utilized Composite Materials

2015 ◽  
Vol 813 ◽  
pp. 94-101
Author(s):  
Hao Jiang ◽  
Li Min Zhou ◽  
Jian Lu
Keyword(s):  
Residual Stress ◽  
Element Model ◽  
Computational Method ◽  
Hole Drilling ◽  
Stress Calculation ◽  
Hole Drilling Method ◽  
Proper Size ◽  
Incremental Hole Drilling ◽  
Drilling Method ◽  
Plastic Process

In this work, a computational method dedicates to realize the residual stress calculation for multi depths with incremental hole-drilling method. An optimized finite element model is determined with proper size compared to the experiment. By invaliding the mechanical properties of the drilled section in the model, the step-by-step drilling procedure is simulated for incremental hole-drilling method. As the practical application of such computational method, a bulk metallic glass (BMG) sample being mechanically treated by severe plastic process is used to demonstrate the distribution of residual stresses along thickness direction.

On the Use of the Hole-Drilling Technique for Residual Stress Measurements in Thin Plates

1992 ◽  
Vol 114 (3) ◽  
pp. 292-299 ◽  
Author(s):  
R. W. Hampton ◽  
D. V. Nelson
Keyword(s):  
Experimental Data ◽  
Residual Stress ◽  
Residual Stresses ◽  
Strain Gage ◽  
Surface Preparation ◽  
Thin Plates ◽  
Hole Drilling ◽  
Thick Plates ◽  
Analysis Methodology ◽  
Drilling Technique

The strain gage blind hole-drilling technique may be used to determine residual stresses at and below the surface of components. In this paper, the hole-drilling analysis methodology for thick plates is reviewed, and experimental data are used to evaluate the methodology and to assess its applicability to thin plates. Data on the effects of gage pattern, surface preparation, hole spacing, hole eccentricity, and stress level are also presented.

scholarly journals Assessing Shot-Peening Residual Stresses by Using the Incremental Hole-Drilling Technique and Laser Interferometry (DSPI)

2014 ◽  
Vol 996 ◽  
pp. 269-276
Author(s):  
João P. Nobre ◽  
Miguel Oliveira ◽  
Armando Albertazzi ◽  
Matias Viotti ◽  
António Castanhola Batista ◽  
...  
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Shot Peening ◽  
Speckle Pattern ◽  
Strain Relaxation ◽  
Laser Interferometry ◽  
Hole Drilling ◽  
X Ray Diffraction ◽  
Incremental Hole Drilling ◽  
Drilling Technique

The incremental hole-drilling technique was applied to determine residual stress profiles in shot-peened steel layers. The accuracy of using an enhanced Digital Speckle Pattern Interferometry technique for measuring the strain relaxation arising around the drilled holes and, consequently, the in-depth residual stress distribution induced by shot-peening, was evaluated. The experimental results were systematically compared with those determined using standard electric strain-gauges. The X-ray diffraction technique was chosen as reference due to its high accuracy to determine shot-peening residual stresses.

Residual Stress Evaluation by the Hole-Drilling Method With Off-Center Hole: An Extension of the Integral Method

1997 ◽  
Vol 119 (1) ◽  
pp. 79-85 ◽  
Author(s):  
Dario Vangi
Keyword(s):  
Residual Stress ◽  
Integral Method ◽  
Radial Direction ◽  
Hole Drilling ◽  
Strain Gages ◽  
Stress Evaluation ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Drilling Method ◽  
Stress Variations

With the incremental hole-drilling method, it is possible to evaluate residual stress variations with depth, acquiring strain values for each step by strain gages. These data can be processed by the integral method. Usually strain gages are not spaced equidistant from the hole center nor arranged in the radial direction, due to practical difficulties in drilling a centered hole. In this study we present a development of the integral method for evaluating stress variations with depth in the specimen for eccentric blind hole cases. The results can be extended and adopted for use with a non-conventional strain gage array.

Stress Calculation Error Analysis for Incremental Hole-Drilling Residual Stress Measurements

1996 ◽  
Vol 118 (1) ◽  
pp. 120-126 ◽  
Author(s):  
G. S. Schajer ◽  
E. Altus
Keyword(s):  
Residual Stresses ◽  
Measurement Errors ◽  
Material Constant ◽  
Hole Drilling ◽  
Calculation Error ◽  
Stress Calculation ◽  
Hole Drilling Method ◽  
Straightforward Method ◽  
Incremental Hole Drilling ◽  
Calculated Stress

The incremental hole-drilling method for measuring non-uniform residual stresses gives stress results that are very sensitive to errors in the measured data. The resulting stress errors can easily become large enough to compromise seriously the usefulness of the calculated stress results. This paper describes a straightforward method for calculating the stress range that has a specified probability of containing the actual residual stresses. Knowledge of this range allows informed interpretations of the stress results to be made. The four measurement error sources considered are: strain errors, hole depth errors, uniform hole diameter errors, and material constant errors. Both the Integral and Power Series stress calculation methods are investigated, and their different responses to measurement errors are described.

scholarly journals Residual stress measurement on 3-D printed blocks of Ti-6Al-4V using incremental hole drilling technique

2019 ◽  
Vol 14 ◽  
pp. 337-344
Author(s):  
Digendranath Swain ◽  
A. Sharma ◽  
S.K. Selvan ◽  
B.P. Thomas ◽  
Govind ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Hole Drilling ◽  
Incremental Hole Drilling ◽  
Drilling Technique

Influence of the Interfacial Roughness on Residual Stress Analysis of Thick Film Systems by Incremental Hole Drilling

2013 ◽  
Vol 768-769 ◽  
pp. 136-143 ◽  
Author(s):  
Esther Obelode ◽  
Jens Gibmeier
Keyword(s):  
Residual Stress ◽  
Thick Film ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Hole Drilling ◽  
Interfacial Roughness ◽  
Stress Evaluation ◽  
Spray Coatings ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling

Thick film systems with coating thicknesses between 50 and 1000 µm are often fabricated by thermal spray processes. During the deposition and due to the substrate pre-treatment residual stresses, which influence the coating properties, develop. Due to the substrate preconditioning thermal spray coatings exhibit a large interfacial roughness. This study investigates the application of the incremental hole-drilling method on thermal spray coatings. The focus is on the influence of the interfacial roughness on the residual stress evaluation. A systematic FE-study was carried out in order to minimize the final error for the residual stress evaluation. The simulation results are transferred to experimental hole-drilling results of a thermally sprayed model thick film system. Finally, the hole-drilling results are compared to the residual stress depth profile that was determined by X-ray diffraction in combination with successive electrochemical layer removal. The results clearly show that the effect of the interfacial roughness can be neglected for residual stress calculation if the mean coating thickness is properly considered for calculation of the calibration function / parameters.

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