scholarly journals Solution of the moiré hole drilling method using a finite-element-method-based approach

2006 ◽  
Vol 43 (22-23) ◽  
pp. 6751-6766 ◽  
Author(s):  
Jaime F. Cárdenas-García ◽  
Sergio Preidikman
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hole Drilling ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Element Method

Simulation and Analysis on the Blind Hole Method Using the Finite Element Method

2013 ◽  
Vol 328 ◽  
pp. 990-994
Author(s):  
Chun Ho Yin ◽  
Chao Ming Hsu ◽  
Ping Shen Su ◽  
Jao Hwa Kuang
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Strain Gage ◽  
Hole Drilling ◽  
Drilling Process ◽  
Dimensionless Parameters ◽  
Inconel 690 ◽  
Stress Components ◽  
Element Method

This study investigates the effectiveness of the hole-drilling strain gage method on residual stress estimation. The thermal elastic-plastic model of the commercial Marc finite element method package is used to simulate and build up the hole-drilling process and residual stress distribution. Two Inconel 690 alloy plate welded with GTAW filler I-52 solder are first simulated using the Marc software. The traditional hole-drilling process is then simulated. The simulated residual strain variation data is incorporated into the hole-drilling strain-gage method to derive the possible residual stress components. The effects of drilling depth and drill size on the accuracy of residual stress estimates are also discussed. A comparison of stress components estimated from the traditional hole-drilling strain gage method and simulated from the Marc software is presented. The modified dimensionless parameters are provided by applying the optimum technique. The numerical results indicate that the proposed dimensionless parameters can significantly improve the accuracy of estimated residual stress components.

scholarly journals Model Residual Stress by Finite Element Method

2018 ◽  
Vol 16 ◽  
pp. 03002
Author(s):  
Delia Garleanu ◽  
Claudia Borda ◽  
Gabriel Garleanu ◽  
Victor Popovici
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Original Model ◽  
Hole Drilling ◽  
Blind Hole ◽  
Stress Modeling ◽  
Residual Stress Modeling ◽  
Element Method

This paper presents an original model developed by finite element method to simulate the behavior of the material to the method “Blind Hole Drilling”, to determine the residual stress. Modeling of this method is possible through the use of the “Birth and Death” which have some elements of ANSYS library. After obtaining the analysis of movements, appropriate loads, a node located from the center hole at a radius calculated. In this way it is easier to estimate the stresses and deformations of a piece. Several measurements are made and based on this model is given in ANSYS. In this way we can have a map of tensions and deformations in a material

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.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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