scholarly journals FES of the effect of free vibration treatment on fatigue damage recovery for notched copper film

2018 ◽  
Vol 165 ◽  
pp. 14008 ◽  
Author(s):  
Hai-Meng Zhang ◽  
De-Guang Shang ◽  
Shuai Lv
Keyword(s):  
Plastic Strain ◽  
Free Vibration ◽  
Dynamic Analysis ◽  
Fatigue Damage ◽  
Copper Film ◽  
Transient Dynamic Analysis ◽  
Vibration Treatment ◽  
Transient Dynamic ◽  
Original Specimen ◽  
Damage Process

In this paper, finite element simulation (FES) of the effect of free vibration treatment on fatigue damage recovery for notched copper film with the thickness of 33 um was investigated. The damage process analyzed by static analysis of original specimen and vibration process analyzed by transient dynamic analysis of damaged specimen were simulated respectively. The transient dynamic analysis was conducted with different frequencies and acceleration amplitudes. It is found that the plastic strain was produced as a result of cyclic loading and reduced after the vibration treatment. The values of plastic strain are different after treatment with different vibration frequencies and acceleration amplitudes. Furthermore, the plastic strain in notch reduces more than that of other areas of the specimen. According to the analysis, the vibration treatment can reduce the plastic strain of notched specimen significantly by which the microproperties are improved so that fatigue damage can be recovered.

Transient dynamic analysis of generally anisotropic materials using the boundary element method

2018 ◽  
Vol 229 (4) ◽  
pp. 1893-1910 ◽  
Author(s):  
R. Q. Rodríguez ◽  
A. F. Galvis ◽  
P. Sollero ◽  
C. L. Tan ◽  
E. L. Albuquerque
Keyword(s):  
Boundary Element Method ◽  
Dynamic Analysis ◽  
Boundary Element ◽  
Anisotropic Materials ◽  
Transient Dynamic Analysis ◽  
Transient Dynamic ◽  
Element Method

Case Study of Seismic Response for Shell Key Gasification Equipment Based on Transient Dynamic Analysis

2016 ◽  
Author(s):  
Jun Shen ◽  
Yunlong Wu ◽  
Heng Peng ◽  
Yinghua Liu
Keyword(s):  
Dynamic Analysis ◽  
Cross Sections ◽  
Coal Gasification ◽  
High Efficiency ◽  
Seismic Analysis ◽  
Seismic Load ◽  
Fe Model ◽  
Transient Dynamic Analysis ◽  
Transient Dynamic ◽  
Gasification Process

Coal gasification is a key technology for clean coal conversion with high efficiency. During the past decade, more than twenty Shell Key Gasification Equipments (SKGE) used in the Shell Coal Gasification Process (SCGP) have been built in coal-to-chemicals industry in China. SKGE is composed of Gasifier and Syngas cooler which are connected by Transfer duct. The support skirt of the Gasifier base is fixed, while the Syngas cooler side is supported by a constant hanger (floating support). In this paper, a FE model of the largest 2000-ton SKGE system in China is established by using ANSYS. The global dynamic response under the seismic load is simulated. In order to verify the correction of the calculation, the results are also compared with that by using ABAQUS. Compared to the traditional static analysis, it can be found that the deformation and stress distribution, the force and moment on several specified cross sections of SKGE change over time under seismic load based on the transient dynamic analysis. As the result of the seismic analysis is the prerequisite and foundation for accurate calculation of each key part (e.g. connection between Transfer duct and Gas reversal chamber), the seismic analysis is one of the most important analyses in the Gasification design, which will ensure the essential safety of SKGE system.

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