EXPERIMENTAL INVESTIGATION AND FINITE ELEMENT ANALYSIS ON COLD-STRETCHING FOR AUSTENITIC STAINLESS PRESSURE VESSELS

摘要

Cold-stretching is an effective way to make the pressure vessels lighter. A test vessel with austenitic stainless steel was designed and manufactured based on the current criterion, and the cold-stretching process was carried out. The deformation of each part of the vessel under the pressure of each stage were measured by the resistance strain gauge in its measurement range. The finite element method is used to calculate the deformation trend of the whole process of cold-stretching. In addition, the strain of complex deformation at nozzle and its surrounding was analyzed by FEM.