Finite element analysis of the creep crack growth of T-type brazed joints

DOI

10.2991/amcce-17.2017.77How to use a DOI?

Keywords

T-type brazed joints; creep; crack growth; finite element method

Abstract

Plate-fin heat exchangers are widely used in the field of nuclear waste heat recovery due to their high heat transfer efficiency and compact structures. The vacuum brazing technology is frequently employed to package these structures. Under high temperature, high pressure and harsh working conditions, cracks caused by creep or creep damage can initiate and growth easily in the brazed joints. they will further bring about the failure of structures. In this work, the creep failure behavior of T-type brazed joints at 650oC was investigated by finite element method. The creep crack initiation and growth of T-brazed joints were analyzed. Combined with actual vacuum brazing process, the effect of brazing metal thickness on the creep crack initiation and growth of the brazed joint were analyzed. Results showed that the edge of the brazing material was most vulnerable to damage. Later on, the central area of the brazing metal was subsequently damaged.An appropriate increase of the brazing metal thickness is thought to be helpful to prolong the creep life of the T-type brazed joints.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - DongXing Wang
AU  - GuoYan Zhou
AU  - Baoan Wang
AU  - Yucai Zhang
PY  - 2017/03
DA  - 2017/03
TI  - Finite element analysis of the creep crack growth of T-type brazed joints
BT  - Proceedings of the 2017 2nd International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 2017)
PB  - Atlantis Press
SP  - 448
EP  - 453
SN  - 2352-5401
UR  - https://doi.org/10.2991/amcce-17.2017.77
DO  - 10.2991/amcce-17.2017.77
ID  - Wang2017/03
ER  -