scholarly journals Simulation of residual stress measuring process in a fiber material cylinder using slitting method

2019 ◽  
Vol 490 ◽  
pp. 022082
Author(s):  
Xiaoyi Hu ◽  
Dalie Liu
Keyword(s):  
Residual Stress ◽  
Fiber Material ◽  
Measuring Process ◽  
Slitting Method ◽  
Stress Measuring

The Experimental Study of Diffraction Angle of Aluminum Alloy 3003

2012 ◽  
Vol 625 ◽  
pp. 291-296
Author(s):  
Neng Quan Duan ◽  
Jian Liang Ren ◽  
Rui Qiang Pang
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Stress Measurement ◽  
Electrical Measuring ◽  
Diffraction Method ◽  
Measuring Method ◽  
X Ray ◽  
Equal Strength ◽  
Diffraction Angle ◽  
Stress Measuring

The most suitable diffraction angle of aluminum alloy 3003 used for stress measuring is aimed to be determined in this paper. The experiment makes a stress measurement of a loading aluminum alloy 3003 equal strength beam with the traditional electrical measuring method and the X-ray stress measurement. With the electrical measuring method as reference, the research study the measured values that acquired from the X-ray diffraction method when the diffraction angle are 142° and 156°, and then compare them with that acquired from electrical measuring method. The measurement results demonstrate that the diffraction angle at 156 ° is better than at 142 ° based on the assessment standards of the liner slope and the distribution of data. Thus the optimum diffraction angle for X-ray to measure the macroscopic stress of aluminum alloy 3003 is 156 °. In this paper，the stress caused by the load on the equal strength beam is assumed to be "residual stress" and thus the conclusion has reference values for the standardization of residual stress measurement of aluminum alloy by XRD and has theoretical guiding significance in the production practices.

Numerical and Experimental Study of the Plasticity Effect on Residual Stress Measurement Using Slitting Method

2013 ◽  
Vol 768-769 ◽  
pp. 107-113
Author(s):  
Amir Hossein Mahmoudi ◽  
Soroush Heydarian ◽  
Kourosh Behnam
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Mechanical Strain ◽  
Residual Stress Measurement ◽  
Stress Fields ◽  
Element Analysis ◽  
Plasticity Effect ◽  
Slitting Method ◽  
Quenching Process ◽  
Temperature Levels

Residual Stress measurement has gained interests among researchers for many years. Slitting method is one of the destructive techniques that relies on the introduction of an increasing cut to a part containing residual stresses. Similar to all other mechanical strain relief techniques, slitting suffers from the level of plasticity occurs within the sample while cutting. In the present research, slitting method was simulated using finite element analysis. The correct performance of the slitting method procedure was explored using known residual stress fields. Then, simulations of the quenching process of beam samples were performed for three different temperature levels; 400°C, 600°C and 850°C. The experimental procedures of the slitting method on the quenched samples at these temperatures were then carried out. The influence of three stress levels on the ability of the slitting method was discussed. Interesting results were observed.

scholarly journals Optimization of Residual Stress Measurement Conditions for a 2D Method Using X-ray Diffraction and Its Application for Stainless Steel Treated by Laser Cavitation Peening

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2772
Author(s):  
Hitoshi Soyama ◽  
Chieko Kuji ◽  
Tsunemoto Kuriyagawa ◽  
Christopher R. Chighizola ◽  
Michael R. Hill
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Evaluation Method ◽  
Stress Measurement ◽  
X Ray Diffraction ◽  
Stress Variation ◽  
X Ray ◽  
Slitting Method ◽  
Average Grain Size ◽  
Measured Residual Stress

As the fatigue strength of metallic components may be affected by residual stress variation at small length scales, an evaluation method for studying residual stress at sub-mm scale is needed. The sin2ψ method using X-ray diffraction (XRD) is a common method to measure residual stress. However, this method has a lower limit on length scale. In the present study, a method using at a 2D XRD detector with ω-oscillation is proposed, and the measured residual stress obtained by the 2D method is compared to results obtained from the sin2ψ method and the slitting method. The results show that the 2D method can evaluate residual stress in areas with a diameter of 0.2 mm or less in a stainless steel with average grain size of 7 μm. The 2D method was further applied to assess residual stress in the stainless steel after treatment by laser cavitation peening (LCP). The diameter of the laser spot used for LCP was about 0.5 mm, and the stainless steel was treated with evenly spaced laser spots at 4 pulses/mm2. The 2D method revealed fluctuations of LCP-induced residual stress at sub-mm scale that are consistent with fluctuations in the height of the peened surface.

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