Fringe modelling and Photoelastic stress Measurement method in tetragonal PWO observed in the plane normal to a crystallographic a-axis

2020 ◽  
Vol 15 (09) ◽  
pp. P09037-P09037
Author(s):  
P.P. Natali ◽  
L. Montalto ◽  
L. Scalise ◽  
F. Davì ◽  
N. Paone ◽  
...  
Keyword(s):  
Measurement Method ◽  
Stress Measurement ◽  
Plane Normal ◽  
Photoelastic Stress

Dual-Axis Hole-Drilling ESPI Residual Stress Measurements

2009 ◽  
Vol 132 (1) ◽  
Author(s):  
Gary S. Schajer ◽  
Michael Steinzig
Keyword(s):  
Residual Stress ◽  
Measurement Errors ◽  
Measurement Method ◽  
Stress Measurement ◽  
Experimental Tests ◽  
Optical Data ◽  
Hole Drilling ◽  
Similar Response ◽  
Plane Normal ◽  
Stress Components

A novel dual-axis ESPI hole-drilling residual stress measurement method is presented. The method enables the evaluation of all the in-plane normal stress components with similar response to measurement errors, significantly lower than with single-axis measurements. A numerical method is described that takes advantage of, and compactly handles, the additional optical data that are available from the second measurement axis. Experimental tests were conducted on a calibrated specimen to demonstrate the proposed method, and the results supported theoretical expectations.

scholarly journals Application of Neutron Stress Measurement Method without Stress-Free Lattice Constant to Practical Material

2005 ◽  
Vol 54 (3) ◽  
pp. 339-345 ◽  
Author(s):  
Hiroshi SUZUKI ◽  
Atsushi MORIAI ◽  
Nobuaki MINAKAWA ◽  
Yukio MORII
Keyword(s):  
Lattice Constant ◽  
Measurement Method ◽  
Stress Measurement ◽  
Free Lattice

Residual Stress Measurement Method Using Ultrasonic Acoustic Velocity

2019 ◽  
Vol 7 (1) ◽  
pp. 33-40
Author(s):  
Hee Jun Kim ◽  
Mo Youn Lee ◽  
Ho Bin Jeong ◽  
In Gyu Park ◽  
In Sik Cho
Keyword(s):  
Residual Stress ◽  
Measurement Method ◽  
Stress Measurement ◽  
Acoustic Velocity ◽  
Residual Stress Measurement

Neutron Stress Measurement of Coarse Crystal Grain in Aluminum Casting Alloy

2010 ◽  
Vol 652 ◽  
pp. 243-248
Author(s):  
Nishida Masayuki ◽  
Hanabusa Takao ◽  
Tatsuya Matsue ◽  
Hiroshi Suzuki
Keyword(s):  
Edge Effect ◽  
Measurement Method ◽  
Stress Measurement ◽  
Internal Stresses ◽  
Casting Alloy ◽  
Aluminum Casting ◽  
New Techniques ◽  
Aluminum Casting Alloy ◽  
Diffraction Peaks ◽  
Crystal Grains

Internal stresses in aluminum casting alloy were measured by the neutron stress measurement method with the apparatus RESA in Japan Atomic Energy Agency (JAEA). In usual cases, coarse crystal grains are included in aluminum casting alloy. These coarse crystal grains make it extremely difficult to estimate the internal stresses by the neutron diffraction [1]. The two problems arise because of the existence of the coarse crystal grains. The first problem is the production of an unstable diffraction profile in the necessary direction. The second is the edge effect which is generated by the overhang of the coarse crystal grains from the neutron irradiation area (gage volume). In this study, two kinds of new techniques used were proposed to resolve these problems. Firstly, the elastic theory based on the sin2ψ method is shown. Diffraction peaks in several directions were found by use of the rocking curve method. Following that, the lattice spaces in each principal direction were calculated from these diffraction peaks using the elastic theory. Secondly, the distribution of edge effect around the gage volume was measured using a small bit of copper single crystal. From this result, the edge effect was canceled out by the modified measurement method which was done symmetrically. Finally, the aluminum casting sample which included coarse crystal grains was set to the tensile testing machine on RESA’s measurement table and the applicability of these new techniques were confirmed experimentally.

120 Biaxial Stress Measurement Method by Using Direction of Grain Growth

2009 ◽  
Vol 2009.47 (0) ◽  
pp. 39-40
Author(s):  
Yoshihiro OBATA ◽  
Yuichi ONO ◽  
Cheng LI ◽  
Takao NAKAGAWA ◽  
Daisuke HINO
Keyword(s):  
Grain Growth ◽  
Measurement Method ◽  
Stress Measurement ◽  
Biaxial Stress
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