Hanželič, B.; Kralj, J.; Bončina, T.; Nečemer, B.; Kramberger, J.; Satošek, R.; Glodež, S. Fatigue Behaviour of Brazed Joints for Heat Exchangers. Materials2024, 17, 479.
Hanželič, B.; Kralj, J.; Bončina, T.; Nečemer, B.; Kramberger, J.; Satošek, R.; Glodež, S. Fatigue Behaviour of Brazed Joints for Heat Exchangers. Materials 2024, 17, 479.
Hanželič, B.; Kralj, J.; Bončina, T.; Nečemer, B.; Kramberger, J.; Satošek, R.; Glodež, S. Fatigue Behaviour of Brazed Joints for Heat Exchangers. Materials2024, 17, 479.
Hanželič, B.; Kralj, J.; Bončina, T.; Nečemer, B.; Kramberger, J.; Satošek, R.; Glodež, S. Fatigue Behaviour of Brazed Joints for Heat Exchangers. Materials 2024, 17, 479.
Abstract
The plate heat exchanger (PHE) is a component that provides heat to be transferred from hot water to domestic cold water without mixing them with high efficiency. Over the lifetime of the PHE, cyclic pressures act on the brazing points and the plates, and this may lead to fatigue failure. The fatigue behaviour of the PHE, designed by using copper-brazed 316L stainless steel, was investigated in this study. First, the fatigue tests under the load ratio R = 0.1 were performed on the Vibrophore 100 testing machine to obtain the S-N curve of the analysed brazed joint. Based on the obtained experimental results, an appropriate material model of the analysed brazed joint has been created, which was validated with numerical calculation in the framework of a program code Ansys. A validated material model was then used for the subsequent numerical analysis of PHE. In order to carry out a numerical calculation using the finite element method (FEM), a 3D model of the heat exchanger was created based on the previous scanning of PHE-geometry. Thereafter, the geometry was parameterised, which allowed us to perform parametric simulations (monitoring different responses depending on the input geometry). Numerical simulations were carried out in the framework of the Ansys software, whereby the obtained results were analysed, and the responses were appropriately characterised according to previously determined load cases.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
