tube grid
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Author(s):  
V. Nemtin ◽  
Maksim Kareev ◽  
M. Kishchenko

This article describes the modeling process in the ANSYS program of residual stresses and strains in combined connection «pipe-tube grid» joints performed by arc welding and friction welding that occur in heat exchangers due to the temperature difference in the casing and pipes.


2019 ◽  
Vol 114 ◽  
pp. 03007
Author(s):  
V.V. Potapov ◽  
V.P. Kolmakov ◽  
L.M. Chebotnyagin

On the basis of the pulse-pressure model of the velocity-induced de-formation of metal pipes proposed by the authors [1] the expanding plas-ma channel of an electric spark, the influence of the collision angle and the contact point speed on the quality of welding of pipes with a tube grid of a heat exchanger were investigated. An algorithm for estimating welding zones is proposed. The applicability of the algorithm is tested on pairs of pipe made of alloy AD1 + tube made of alloy AMg6.


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