A finite-element technique to analyze the data measured by the hole-drilling method

1990 ◽  
Vol 30 (2) ◽  
pp. 120-123 ◽  
Author(s):  
D. Shaw ◽  
H. Y. Chen
Keyword(s):  
Finite Element ◽  
Hole Drilling ◽  
Finite Element Technique ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Element Technique

3D Finite Element Simulation of Shot Peening Using a Sequential Model with Multiple-Shot Impacts

2019 ◽  
Vol 17 (03) ◽  
pp. 1850137
Author(s):  
Qin Wei ◽  
Wenxin Wu ◽  
Wei He ◽  
Jianguo Zhu ◽  
Jian Zhang
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Numerical Results ◽  
Hole Drilling ◽  
Sequential Model ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Drilling Method ◽  
Multiple Shot ◽  
Gh4169 Alloy

A sequential model of multiple-shot impacts has been established to investigate the shot peening process. Shot groups are proposed and designed with different patterns to obtain full surface coverage in the impacted region and a satisfactory computational efficiency. The sequential model was applied for the prediction of residual stress on a GH4169 alloy specimen. The results showed that uniform and saturated states of residual stress along the surface and depth profile were obtained in the impacted region when the numerical order of shot patterns reached 4. Furthermore, the numerical results of compressive residual stress in the subsurface were compared with the experimental results obtained using the X-ray diffraction (XRD) analysis and the incremental hole drilling method. The maximum relative error between the numerical results and XRD measurement was 11.6%. Furthermore, the stress profile measured using the incremental hole drilling method was consistent with the numerical results. The established finite element model demonstrated its robustness and effectiveness for the evaluation of residual stress in the shot-peened GH4169 alloy, and it may be applied to other metallic materials with simple modifications.

scholarly journals Determination of Residual Welding Stresses in a Steel Bridge Component by Finite Element Modeling of the Incremental Hole-Drilling Method

2019 ◽  
Vol 9 (3) ◽  
pp. 536 ◽  
Author(s):  
Evy Van Puymbroeck ◽  
Wim Nagy ◽  
Ken Schotte ◽  
Zain Ul-Abdin ◽  
Hans De Backer
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Material Behavior ◽  
Hole Drilling ◽  
Steel Bridge ◽  
Hole Drilling Method ◽  
Linear Elastic ◽  
Fatigue Design ◽  
Incremental Hole Drilling ◽  
Drilling Method

For welded bridge components, the knowledge of residual stresses induced by welding is essential to determine their effect on the fatigue life behavior resulting in optimal fatigue design and a better knowledge about the fatigue strength of these welded connections. The residual stresses of a welded component in an orthotropic steel bridge deck are determined with the incremental hole-drilling method. This method is specified by the American Society for Testing and Materials ASTM E837-13a and it can be used only when the material behavior is linear-elastic. However in the region of the bored hole, there are relaxed plastic strains present that can lead to significant error of the measured stresses. The hole-drilling procedure is simulated with three-dimensional finite element modeling including a simplistic model of plasticity. The effect of plasticity on uniform in-depth residual stresses is determined and it is concluded that residual stresses obtained under the assumption of linear-elastic material behavior are an overestimation. Including plasticity for non-uniform in-depth residual stress fields results in larger tensile and smaller compressive residual stresses. Larger tensile residual stresses cause premature fatigue failure. Therefore, it is important to take these larger tensile residual stresses into account for the fatigue design of a welded component.

Application of Finite Element Calculations to Residual Stress Measurements

1981 ◽  
Vol 103 (2) ◽  
pp. 157-163 ◽  
Author(s):  
G. S. Schajer
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Strain Relaxation ◽  
Hole Drilling ◽  
Relaxation Data ◽  
Experimental Procedure ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Finite Element Calculations ◽  
Specimen Shape

The use of finite element calculations is assessed as a means of analysis of the strain relaxation data from a measurement of residual stress by a material removal method. This application is important because it allows a greater flexibility of choice for specimen shape, materials, and experimental procedure than would be possible if only analytic or experimental calibrations are used. Three possible applications are described using the hole-drilling method as an example, and comparisons of calculated results and experimental measurements are presented.

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