scholarly journals The Residual Stress Simulation Analysis of the Vacuum Eutectic Soldering for Metal and LTCC Substrate

2015 ◽  
Author(s):  
Chuanliang Wei ◽  
Dejian Zhou
Keyword(s):  
Residual Stress ◽  
Simulation Analysis ◽  
Stress Simulation ◽  
Ltcc Substrate

Development of a Residual Stress Simulation Benchmark for a Single Bead-on-Plate Weldment

2006 ◽  
Author(s):  
Peter J. Bouchard ◽  
Lyndon Edwards ◽  
Anastasius G. Youtsos ◽  
Roger Dennis
Keyword(s):  
Residual Stress ◽  
Assessment Procedure ◽  
Defect Assessment ◽  
Best Estimate ◽  
Weld Residual Stress ◽  
Single Bead ◽  
Stress Prediction ◽  
Stainless Steel Bead ◽  
Stress Simulation ◽  
Network Project

Finite element weld residual stress modelling procedures involve complex non-linear analyses where many assumptions and approximations have to be made by the analyst. Weld modelling guidelines for inclusion in the R6 defect assessment procedure are in preparation and will be accompanied by a series of validation benchmarks that can be used to evaluate the accuracy of weld modelling procedures and assess their suitability for use in fracture assessments. It is intended to base one of the benchmarks on a stainless steel bead-on-plate weldment that has been extensively studied by members of Task Group 1 of the NeT European Network project. This paper uses round robin residual stress measurements from the NeT project to derive a statistically based ‘best estimate’ distribution of transverse stress passing through the wall-section at mid-length of the bead-on-plate weldment. The accuracy of a state-of-the-art residual stress prediction is benchmarked against the best estimate measurements using a root mean square error analysis and comparisons of decomposed components of stress. The appropriateness of using the predicted residual stresses in fracture assessments is assessed by comparing stress intensity factors based on the measured and predicted distributions of stress. The results from these studies will be used to help establish accuracy targets and acceptance criteria for the welding benchmark.

Thermal Residual Stress Simulation in Thermoplastic Filament Winding Process

2003 ◽  
Vol 16 (6) ◽  
pp. 497-519 ◽  
Author(s):  
Martin Schlottermuller ◽  
Haibo Lu ◽  
York Roth ◽  
Norbert Himmel ◽  
Ralf Schledjewski ◽  
...  
Keyword(s):  
Residual Stress ◽  
Filament Winding ◽  
Thermal Residual Stress ◽  
Filament Winding Process ◽  
Stress Simulation

Finite Element Simulation Analysis on Residual Stress Relief of 7075 Aluminum Alloy Ring

2021 ◽  
Vol 1032 ◽  
pp. 135-140
Author(s):  
Shao Feng Wu ◽  
Xiang Sheng Gao ◽  
Xian Rang Zhang ◽  
Han Jun Gao
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Simulation Analysis ◽  
Material Model ◽  
Stress Relief ◽  
Isotropic Hardening ◽  
7075 Aluminum Alloy ◽  
Vibration Stress ◽  
Structural Parts ◽  
Creep Constitutive Model

Vibration stress relief (VSR) and thermal stress relief (TSR) are important method to eliminate the residual stress of structural parts. The thermal vibratory stress relief (TVSR) is a new method to decrease and homogenize the residual stress. Based on the stress relaxation tests and the equivalent vibration equation of modal analysis, the creep constitutive model and the bilinear isotropic hardening plasticity material model (BISO) are combined to establish the numerical simulation model of TVSR of 7075 aluminum alloy ring part. The simulation results show that four different initial blank residual stress levels are obtained after quenching process, and the residual stress elimination and homogenization effect of TSR and TVSR is better than that of VSR. TVSR has a better effect on both residual stress elimination and homogenization, and the residual stress relief rate can reach more than 20%.

Stress Simulation Analysis of Multilayer Film Deposition

2018 ◽  
Vol 55 (4) ◽  
pp. 043101
Author(s):  
李长安 Li Chang′an ◽  
杨明冬 Yang Mingdong ◽  
全本庆 Quan Benqing ◽  
关卫林 Guan Weilin
Keyword(s):  
Multilayer Film ◽  
Simulation Analysis ◽  
Film Deposition ◽  
Stress Simulation

Analysis of Cornering Strength of Steel Wheels Including the Effects of Disc and Rim Interference Assembly

2019 ◽  
Author(s):  
Bin Dang ◽  
Yingchun Shan ◽  
Xiandong Liu ◽  
Xiaoran Wang ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fatigue Test ◽  
Commercial Vehicle ◽  
Simulation Analysis ◽  
Cyclic Stress ◽  
Stress Variation ◽  
Steel Wheel ◽  
Bending Load ◽  
Simulation Results ◽  
Stress Simulation

Abstract The cornering fatigue test of commercial vehicle steel wheel is modeled and simulated by finite element method in this paper. The influence of interference stress between wheel disc and rim on the simulation results is analyzed. The interference stress is taken as predefined fields to superimpose with the stress generated by the bending load. Then the influence of two different superposition methods defining the interference stress as the average stress and the predefined fields on the stress in dangerous area of the wheel is compared. The results show that the interference stress has a significant effect on the stress state of the wheel and increases the amplitude of symmetric cyclic stress, which directly affects the prediction of fatigue life of the wheel. Therefore, the interference stress must be taken into consideration in the simulation analysis of cornering fatigue test. The influence of different interference stress superposition methods on the stress variation in the dangerous area is obviously different. The method which superimposes interference stress as predefined fields with the stress generated by the bending load is more consistent with the actual assembling and loading process of the wheel. Therefore, this paper provides a reasonable method for the simulation of cornering fatigue test, which can provide more accurate stress simulation results for the prediction of cornering fatigue life of the wheel.

Simulation of Residual Stress in Hot Rolled Large Size H-Beams

2011 ◽  
Vol 704-705 ◽  
pp. 1370-1378 ◽  
Author(s):  
Guo Ming Zhu ◽  
Yong Lin Kang ◽  
Guang Ting Ma
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Tensile Stress ◽  
Cross Sections ◽  
Simulation Analysis ◽  
Residual Stress Field ◽  
Mechanical Coupling ◽  
Large Size ◽  
Final Rolling ◽  
Hot Rolled

The distribution of residual stress in hot rolled large size H-beams is complex due to the uneven temperature distribution on the final rolling cross-sections. In this paper, 3D simulation analysis is conducted on the residual stress field of cooled large H-beams and the transformation of residual stress field during the flange cutting based on the calculations of thermo-mechanical coupling whole rolling process. There are tensile stress in the flange and web connection areas and compressive stress in web. During the flange cutting process, tensile stress increases suddenly when the kerf arrives at the flange and web connection area, resulting in the brittle fracture of the web. The method of controlling the residual stress of large H-beams is also simulated. Improvement in the distribution of residual stress is achieved through the forced cooling of the outside flange or reduction of the temperature differences on the final rolling cross-sections.

Stress Simulation for DE-GMAW in Bonding Steel with Aluminum

2011 ◽  
Vol 268-270 ◽  
pp. 24-29 ◽  
Author(s):  
Ming Liang Wu ◽  
Jian Kang Huang ◽  
Ri Hong Han ◽  
Yu Shi
Keyword(s):  
Residual Stress ◽  
Base Metal ◽  
Heat Input ◽  
Gas Metal Arc Welding ◽  
Source Model ◽  
Metal Arc Welding ◽  
Double Electrode ◽  
Melting Current ◽  
Metal Welding ◽  
Stress Simulation

DE-GMAW (Double-Electrode Gas Metal Arc Welding) is a new welding technology. It is possible to change the melting current while the base metal current still be controlled at a desired level because the changed part of the melting current would be bypassed without flowing through the workpiece. So the heat input of base metal can be controlled accurately in DE-GMAW, and this welding method is suitable for dissimilar metal welding which has strict requirements for heat input of base metal, such as joining of steel and aluminum. On the basis of heat source model of DE-GMAW, numerical simulation and analysis on temperature field and residual stress for DE-GMAW in bonding steel and aluminum were done. The results show that residual stress after welding changed sharply from close 0 MPa to about 130 MPa at the interface of aluminum and steel. This value is greater than the binding force of steel, aluminum interface.

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