NUMERICAL CALCULATION AND ANALYSIS OFSINGLE-CURVATURE POLYHEDRON HYDRO-BULGING PROCESSFOR MANUFACTURING SPHERICAL VESSELS

摘要

Single-curvature polyhedron hydro-bulging technology is a new technology for manufacturingspherical vessels and it has a good application foreground. This technology has been used in practice. Butthe designing and manufacturing of polyhedron is based on experiences, and the final quality of sphericalvessels cannot be forecast quantitatively. In the paper, the FEM code, MARC, is used to simulate thehydrobulging process of a single-curvature polyhedron, including loading and offloading. And thedistributions of stress and strain are acquired as well as other important data. Comparing with theexperimental results, it shows that single-curvature polyhedron hydro-bulging process can be simulatedwell by the FEM code.