72 Inches inmm

FOV is determined by the focal length and the size of the image sensor (H), represented in Figure 1. The larger the FOV is, the wider the object area captured ...

Male Female Connector - 4 PIN.

Steinzig M, Ponslet E (2003) Residual Stress Measurement Using the Hole Drilling Method and Laser Speckle Interferometry: Part I. Exp Tech 27(3):43–46

Melamed S (2015) Compact ESPI Device for Isotropic Measurements of Residual Stress. M.A.Sc. dissertation, University of British Columbia, Vancouver, Canada.

Ultraviolet (UV) Image Sensor. Global shutter CMOS image sensors specially designed for the UV spectrum. SWIR Image Sensor. Multi-purpose high-resolution SWIR ...

40 inchesto mm

This work was financially supported through a grant from the Natural Sciences and Engineering Research Council of Canada (NSERC). Dr. Juuso Heikkinen kindly reviewed the manuscript and made several helpful comments and suggestions.

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52 inches inmm

Grant PV, Lord JD, Whitehead PS (2002) The Measurement of Residual Stresses by the Incremental Hole Drilling Technique. Measurement Good Practice Guide No.53, National Physical Laboratory, Teddington, UK.

Suterio R, Albertazzi A, Amaral FK (2006) Residual Stress Measurement Using Indentation and a Radial Electronic Speckle Pattern Interferometer - Recent Progress.  J Strain Anal Eng Des 41(7):517–524

Nelson DV, McCrickerd JT (1986) Residual-stress Determination Through Combined Use of Holographic Interferometry and Blind-Hole Drilling. Exp Mech 26(4):371–378

Nelson DV, Makino A, Schmidt T (2006) Residual Stress Determination Using Hole Drilling and 3D Image Correlation. Exp Mech 46(1):31–38

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McGinnis MJ, Pessiki S, Turker H (2005) Application of Three-dimensional Digital Image Correlation to the Core-drilling Method. Exp Mech 45(4):359–367

Schajer GS, Prime MB (2006) Use of Inverse Solutions for Residual Stress Measurements. J Eng Mater Technol 128(3):375–382

Boiten RG, ten Cate W (1952) A Routine Method for the Measurement of Residual Stresses in Plates. Appl Sci Res A3(5):317–343

Stresstech Oy, Finland (2021) Prism Hole Drilling System for Residual Stress Measurement. https://www.stresstech.com/products/prism/ . Accessed 26 Feb 2021.

An Y, Schajer GS (2011) Pixel Quality Evaluation and Correction Procedures in Electronic Speckle Pattern Interferometry. Exp Tech 35(5):23–29

Schajer GS (1988) Measurement of Non-Uniform Residual Stresses Using the Hole-Drilling Method. Part I. Journal of Engineering Materials and Technology 110(4):338–343.

36 inches inmm

Schajer GS (2020) Compact Calibration Data for Hole-Drilling Residual Stress Measurements in Finite-Thickness Specimens. Exp Mech 60(5):665–678

Schajer GS, Winiarski B, Withers PJ (2013) Hole-Drilling Residual Stress Measurement With Artifact Correction Using Full-Field DIC. Exp Mech 53(2):255–265

Schajer GS, Rickert TJ (2011) Incremental Computation Technique for Residual Stress Calculations Using the Integral Method. Exp Mech 51(7):1217–1222

Albertazzi A, Zanini F, Viotti M, Veiga C (2015) Residual Stresses Measurement by the Hole-Drilling Technique and DSPI Using the Integral Method with Displacement Coefficients. Proceedings of the 5th International Symposium on Experimental Mechanics and 9th Symposium on Optics in Industry (ISEM-SOI), Guanajuato, Mexico.

Schajer GS, Whitehead PS (2018) Hole-Drilling Method for Measuring Residual Stress. Morgan & Claypool, Williston, VT, USA.

The proposed residual stress computation method is shown to be an effective and practical way to compute residual stresses from optical hole-drilling measurements.

Several computation variants are explored, some show high stress sensitivity, while others give resistance to common measurement artifacts. Surface displacement data taken from near the hole edge give the highest stress sensitivity, while more distant data give greater ability to identify interior stresses.

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ASTM (2020) Determining Residual Stresses by the Hole-Drilling Strain-Gage Method. Standard Test Method E837–20. American Society for Testing and Materials, West Conshohocken, PA.

0.48into mm

Mathar J (1934) Determination of Initial Stresses by Measuring the Deformation Around Drilled Holes. Trans Am Soc Mech Eng 56(4):249–254

Schajer GS, Steinzig M (2005) Full-Field Calculation of Hole Drilling Residual Stresses from ESPI Data. Exp Mech 45(6):526–532

Soete W, Vancrombrugge R (1950) An Industrial Method for the Determination of Residual Stresses. Proceedings SESA 8(1):17–28

96 inchesto mm

2020316 — Scanning Objective Lens (4x) · Low Power Objective (10x) · High Power Objective Lens (40x) · Oil Immersion Objective Lens (100x) · Specialty ...

Schajer GS (1988) Measurement of Non-Uniform Residual Stresses Using the Hole-Drilling Method. Part II. Journal of Engineering Materials and Technology 110(4):344–349.

You get the same intuitive and user friendly interface as Blackmagic Design's award winning cameras. It's just like using a professional digital film camera!

Nau A, von Mirbach D, Scholtes B (2013) Improved Calibration Coefficients for the Hole-Drilling Method Considering the Influence of the Poisson Ratio. Exp Mech 53(8):1371–1381

24 inchto mm

Schajer, G.S. Optical Hole-Drilling Residual Stress Calculations Using Strain Gauge Formalism. Exp Mech 61, 1369–1380 (2021). https://doi.org/10.1007/s11340-021-00740-7

The objective here is to provide a residual stress computation scheme that can be implemented straightforwardly and efficiently, also to provide the needed calibration data.

48inchtocm

Specifications. Iris diaphragm; Recommended for controlling depth of field in photography; Close the iris diaphram to increase the depth of field ...

The approach taken is to recast the optical data into a compact arrangement that parallels the established format used for strain gauge style calculations.

Optical measurement techniques such as digital image correlation and speckle interferometry have been applied to hole-drilling evaluations of residual stress for some decades. These full-field non-contact measurements can have significant advantages over the traditional strain gauge method. However, optical measurements are still only rarely used for practical measurements outside the research environment. A significant barrier to such use is the mathematical challenge of analyzing the large quantity of optical data to evaluate the residual stresses.

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Focht G, Schiffner K (2003) Determination of Residual Stresses by an Optical Correlative Hole-drilling Method. Exp Mech 43(1):97–104

Vishay Measurements Group, Inc. (1993) Measurement of Residual Stresses by the Hole-Drilling Strain-Gage Method. Tech Note TN-503–6. Vishay Measurements Group, Inc., Raleigh, NC. 16pp.