Artificial thermal strain method: A novel approach for the analysis and fast prediction of the thermal distortion

2021 ◽  
Vol 289 ◽  
pp. 116937
Author(s):  
Chao Wang ◽  
Duc Truong Pham ◽  
Chunbiao Wu ◽  
Jae-woong Kim ◽  
Shizhong Su ◽  
...  
Keyword(s):  
Thermal Strain ◽  
Thermal Distortion ◽  
Novel Approach ◽  
Fast Prediction ◽  
Strain Method

Fast prediction of thermal distortion in metal powder bed fusion additive manufacturing: Part 1, a thermal circuit network model

2018 ◽  
Vol 22 ◽  
pp. 852-868 ◽  
Author(s):  
Hao Peng ◽  
Morteza Ghasri-Khouzani ◽  
Shan Gong ◽  
Ross Attardo ◽  
Pierre Ostiguy ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Metal Powder ◽  
Network Model ◽  
Thermal Distortion ◽  
Powder Bed Fusion ◽  
Powder Bed ◽  
Thermal Circuit ◽  
Fast Prediction

Fast prediction of thermal distortion in metal powder bed fusion additive manufacturing: Part 2, a quasi-static thermo-mechanical model

2018 ◽  
Vol 22 ◽  
pp. 869-882 ◽  
Author(s):  
Hao Peng ◽  
Morteza Ghasri-Khouzani ◽  
Shan Gong ◽  
Ross Attardo ◽  
Pierre Ostiguy ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Metal Powder ◽  
Mechanical Model ◽  
Thermal Distortion ◽  
Powder Bed Fusion ◽  
Powder Bed ◽  
Fast Prediction

Inherent Strain Method for Residual Stress Measurement and Welding Distortion Prediction

2016 ◽  
Author(s):  
Ninshu Ma ◽  
Keiji Nakacho ◽  
Takahiko Ohta ◽  
Naoki Ogawa ◽  
Akira Maekawa ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Welded Joints ◽  
Stress Measurement ◽  
Three Dimensional ◽  
Diffraction Method ◽  
Welding Distortion ◽  
Fast Prediction ◽  
Inherent Strain ◽  
Inherent Strain Method ◽  
Strain Method

Inherent strain method was employed to measure the distribution of three dimensional welding residual stresses in several multi-pass welded joints of thick pipes and thick cladded plates. Since a function expression approach to the distribution of inherent strains was developed, the measuring efficiency for three dimensional internal welding residual stresses in complicated welded joints was improved a lot. The residual stresses measured by inherent strain method were compared with the high cost stress release method and neutron diffraction method. Furthermore, inherent deformation parameters, which are defined by integrated values of inherent strains on transverse sections, were used for the fast prediction of welding distortion in assembling structures. Based the predicted welding distortion, its mitigation methods such as tack welding and jig constraint were discussed.

scholarly journals Fast Prediction for Resistance Spot Welding Deformation Using Inherent Strain Method and Nugget Model

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7180
Author(s):  
Takeshi Chino ◽  
Atsushi Kunugi ◽  
Toshikazu Kawashima ◽  
Goro Watanabe ◽  
Cao Can ◽  
...  
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Deformation ◽  
Spot Welds ◽  
Resistance Spot ◽  
Resistance Spot Welds ◽  
Fast Prediction ◽  
Inherent Strain ◽  
Inherent Strain Method ◽  
Strain Method

In a car body, there exist thousands of resistance spot welds, which may induce large deformation during the manufacturing process. Therefore, it is expected that automotive industries will develop a method and a computing system for the fast and simple prediction of its deformation. Although the inherent strain method has been used for the fast prediction of arc welding deformation, it has not been applied to resistance spot welding so far. Additionally, the electrical-thermal-mechanical coupling analysis for the deformation induced by resistance spot welding is complicated and much more time-consuming. Therefore, in this study, a nugget model of the resistance spot weld has been developed, and the inherent strain method is extended for use in the fast prediction of resistance spot welding deformation. In addition, the deformation of a vehicle part with 23 resistance spot welds was efficiently predicted within around 90 min using the inherent strain method, displaying good accuracy compared with the measurement.

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