Stress Analysis and Optimization Research of Cladding Titanium-Steel Tube Sheets in Different Tube Patterns

Abstract

Cladding titanium-steel plate is often used in design of pressure vessel. Using large finite element software, models of cladding titanium-steel tube sheets of tubular heat exchangers are established, to investigate the effect of different tube patterns, including triangle tube pattern and square tube pattern on cladding titanium-steel tube sheets. What is more, stress distribution characteristics of cladding titanium-steel tube sheets in different tube patterns are obtained under different tube diameters. Results show that the effect of tube patterns on cladding titanium-steel tube sheets mainly concentrated in tube layout area. Compared with triangular tube pattern, square tube pattern could effectively improve the phenomenon of stress concentration of cladding titanium-steel tube sheet at the connection of base layer and cladding layer, and then improve performance of cladding titanium-steel tube sheet. However, increase of tube diameters makes an adverse effect on performance of cladding titanium-steel tube sheets in both tube patterns. Through reasonable decrease of tube diameter could enhance the performance of cladding titanium-steel tube sheet. Results provide references to study and design heat exchanger with cladding steel tube sheet.

Investigation on Performance of Hydraulically Expanded Joint of Titanium–Steel Clad Tubesheet

“…Previous studies mainly focused on the combination of a carbon steel tube and low-alloy steel tube sheet, or the combination of a titanium tube and single-material tube sheet. For the combination of titanium tube and titanium–steel clad tubesheet, we can find reports on the stress analysis [ 16 , 17 ], creep of titanium [ 18 ], etc. However, there are few reports on the impact of the titanium–steel clad tubesheet cladding layer and grooving parameters on the performance of expanded joints.…”