scholarly journals Effects of Numerical Methods on Residual Stress Evaluation by the Incremental Hole-Drilling Technique Using the Integral Method

2016 ◽  
Keyword(s):  
Residual Stress ◽  
Numerical Methods ◽  
Integral Method ◽  
Hole Drilling ◽  
Stress Evaluation ◽  
Incremental Hole Drilling ◽  
Drilling Technique

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.

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.

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.

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.

Evaluation of Welding Residual Stresses Using the Incremental Hole-Drilling Technique

2006 ◽  
Vol 514-516 ◽  
pp. 768-773
Author(s):  
Joao P. Nobre ◽  
Altino Loureiro ◽  
António Castanhola Batista ◽  
A. Morão Dias
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Numerical Study ◽  
Hole Drilling ◽  
The Finite Element Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasticity Effect ◽  
Incremental Hole Drilling ◽  
Drilling Technique

In this work the reliability of the hole-drilling technique (HDT) for measuring welding residual stresses was analysed. HDT residual stress results were systematically compared with those determined by X-ray diffraction. A systematic overestimation of the residual stresses determined by HDT was observed, which was mainly attributed to the possibility of the so-called plasticity effect occurring. Experimental results were discussed taking the measurement principles of both techniques into consideration. In addition, preliminary results of a numerical study, using the finite element method, will be presented for a better understanding of the plasticity effect on HDT residual stress results.

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