ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Aiming at the radiator with tube-to-plate structure applied usually in aeroplane, atwo-dimensional model for finite element analysis was established in this work. By ANSYS software,the temperature field and stress field of electron beam brazing (EBB) 1Cr18Ni9Ti stainless steelradiator by two kinds of process were numerically simulated. The calculated results of temperaturefield show, by the stage-by-stage heating process, the uniform temperature distribution of radiatorfaying face was obtained. The temperature of most regions is between 1042~1051°C, which is in therange of brazing temperature. The calculation results of stress field indicate, for radial residual stress,the obvious stress concentration region was found in faying face by direct-heating process; whilethere was no stress concentration in faying face by stage-by-stage heating process. For circumferentialresidual stress, compared the stage-by-stage heating process with direct-heating process, the peakvalue of tensile stress reduces by 11.2%. Compared circumferential residual stress with radial residualstress by two kinds of brazing process, the peak value of circumferential tensile stress is higher thanradial tensile stress. So the dangerous position of faying face is along circle direction, namely, theheating direction of scanning electron beam. Consequently, the temperature difference betweendifferent positions in faying face must be controlled well during heating. The reduction of temperaturedifference can fall the peak value of tensile stress and improve the distribution of residual stress
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.649.pdf
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