3D DIGITAL IMAGE CORRELATION STUDY OF GLOBE VALVE HOUSING SUBJECTED TO INTERNAL PRESSURE

Abstract

Globe valves are one of the most widely used industrial fittings. Due to variety in globe valve application, different loadings occur in its working life (static, dynamic, thermal etc.), but the most dominant one is internal pressure. This paper presents the analysis of standard globe valve housing under the internal pressure using 3D Digital Image Correlation method, Finite element analysis and calculation according to EN standard. Experimental analysis was focused on determining mechanical properties of critical areas, i.e. on local areas of globe valve housing with high geometrical discontinuities. Experimental system consists of cameras for 3D displacement and strain analysis and software Aramis. Models designed using FEA are verified through the experiment, while at the same time the possibility of using Aramis system for these constructions has been proven. It is found that the predictions from the model agree well with experimental results as the result differences between two methods in the area of the highest strain values vary below 30 %, which is satisfactory for engineering application. Experimental and numerical results demonstrate that the experimental method is adequate for solving geometrically complex problems and provides an opportunity for further development and improvement for practical industrial application.