scholarly journals Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

2020 ◽  
Vol 7 (3) ◽  
pp. 036537
Author(s):  
Leixiong Deng ◽  
Jianping Zhao ◽  
Zhanyu Wang
Keyword(s):  
Residual Stress ◽  
Spherical Indentation ◽  
Indentation Method ◽  
Yield Plateau ◽  
Metal Material

scholarly journals Spherical indentation method for estimating equibiaxial residual stress and elastic–plastic properties of metals simultaneously

2018 ◽  
Vol 33 (8) ◽  
pp. 884-897 ◽  
Author(s):  
Guangjian Peng ◽  
Zhike Lu ◽  
Yi Ma ◽  
Yihui Feng ◽  
Yong Huan ◽  
...  
Keyword(s):  
Residual Stress ◽  
Spherical Indentation ◽  
Indentation Method ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Image Position

Abstract

The Welding Residual Stress Analysis on High Performance Bridge Steel with Different Testing Method

2014 ◽  
Vol 989-994 ◽  
pp. 883-886
Author(s):  
Huan Xue ◽  
Rong Feng Li ◽  
Li Yu ◽  
Dong Liu ◽  
Wen Jie Peng
Keyword(s):  
Residual Stress ◽  
Base Metal ◽  
High Performance ◽  
Hole Drilling ◽  
Indentation Method ◽  
X Ray ◽  
Hole Drilling Method ◽  
Bridge Steel ◽  
Drilling Method ◽  
Welding Line

The residual stress on X groove welding plate of high performance bridge steel 4MnNbq is analyzed. The X-ray diffraction method, hole drilling method and indentation method are respectively used to test the residual stress on welding line, heat-affected zone and base metal. The longitudinal and transversal residual stress are analyzed and compared. The results show that the stress along welding line direction is far larger than the transversal one and the stress on base metal are comparatively smaller than the welding line. The testing results of three methods match well, while the results of X-ray method and hole drilling method are much closer, the relative error of indentation method is comparatively larger.

scholarly journals Residual Stress Improvement Mechanism on Metal Material by Underwater Laser Irradiation.

2000 ◽  
Vol 42 (6) ◽  
pp. 567-573 ◽  
Author(s):  
Yuji SANO ◽  
Masaki YODA ◽  
Naruhiko MUKAI ◽  
Minoru OBATA ◽  
Masanori KANNO ◽  
...  
Keyword(s):  
Residual Stress ◽  
Laser Irradiation ◽  
Metal Material ◽  
Underwater Laser

The Research of Surface Residual Stress about Glass Ceramics

2012 ◽  
Vol 226-228 ◽  
pp. 2014-2018
Author(s):  
Jing He Wang ◽  
Kui Wang ◽  
Xun Wang ◽  
Wei Song ◽  
Xiao Li Song ◽  
...  
Keyword(s):  
Residual Stress ◽  
Yield Stress ◽  
Glass Ceramics ◽  
Contact Theory ◽  
Spherical Indentation ◽  
Calculation Formula ◽  
Processing Quality ◽  
Surface Residual Stress ◽  
Stress Strain ◽  
Nano Indentation

We have researched the residual stress in super-smooth glass ceramics using nano-indentation technology, according to the characteristic that the residual stress in the process of pressure is sensitive to the pileup around the indenter, we can determine the changing area, then combine this with the elasto-plastic contact theory, thus the residual stress calculation formula is obtained. By the continuous strain obtained by a spherical indenter and the research on the yield stress and stress-strain curves of microcrystalline glass through spherical indentation experiments, we can get the rule which can tell us how the residual stress of the microcrystalline glass changes with the depth from surface. This research helps to improve the processing quality as well as the performance of the super-smooth surfaced microcrystalline glass, obviously it has a wide application prospect.

Determination of Residual Stress and Strain-Hardening Exponent Using Artificial Neural Networks

2012 ◽  
Vol 472-475 ◽  
pp. 332-335
Author(s):  
Chun Ping Guan ◽  
Hong Ping Jin
Keyword(s):  
Residual Stress ◽  
Strain Hardening ◽  
Material Properties ◽  
Plastic Material ◽  
Spherical Indentation ◽  
Strain Hardening Exponent ◽  
Stress And Strain ◽  
Ann Model ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

Through dimensional analysis of indentation parameters in this study, we propose an artificial neural network (ANN) model to extract the residual stress and strain-hardening exponent based on spherical indentation. The relationships between indentation parameters and the residual stress and material properties are numerically calibrated through training and validation of the ANN model. They enable the direct mapping of the characteristics of the indentation parameters to the residual stress and the elastic-plastic material properties. The proposed ANN model can be used to quickly and effectively determine the residual stress and strain-hardening exponent.

Measuring Residual Stress with the Indentation Method in Struc­tural Ceramics

2005 ◽  
Vol 297-300 ◽  
pp. 515-520
Author(s):  
Tarou Tokuda ◽  
Rong Gang Wang ◽  
Mitsuo Kido ◽  
Gonojo Katayama
Keyword(s):  
Fracture Toughness ◽  
Residual Stress ◽  
Phase Transformation ◽  
Residual Stresses ◽  
Treatment Method ◽  
Indentation Load ◽  
X Rays ◽  
Ray Method ◽  
Indentation Method ◽  
X Ray

This study deals with the indentation method of measuring residual stress in structural ceramics. First we investigate the appropriate pretreatment for measuring fracture toughness (basis value, KC) while avoiding any influence from residual stress, which is important when estimating residual stress using the indentation method. Based on the fracture toughness value, the residual stresses in Al2O3, Si3N4 and ZrO2 ceramics are estimated using the indentation method. Phase transformation is a problem when estimating residual stress using the indentation method with ZrO2 ceramics. Residual stresses in Al2O3 and Si3N4 can be largely eliminated by annealing the specimen after hand grinding. Consequently, it is thought that this treatment method is effective for determining the basis value KC. The estimated residual stress values in Al2O3 and Si3N4 obtained by the indentation method at 98 N corresponded closely to the values obtained wih X-rays. The residual stress value obtained by the indentation method for ZrO2 was close to the value obtained through the X-ray method, when the indentation load was 294 N. When estimating the residual stress in ZrO2 using the indentation method, the influence of the phase transformation caused by the indentation is added onto the original residual stress, when the indentation is small. The influence becomes smaller when the indentation load is large. If the applied indentation load is between 294 N and 490 N, the indentation method is effective for estimating the residual stresses in Al2O3, Si3N4 and ZrO2 ceramics.

Sign in / Sign up

Export Citation Format

Share Document