THE PRETEST ANALYSIS FOR OVERPRESSURIZATION CONTAINMENT VESSEL USING ENDOCHRONIC MODEL

This paper initially gives general steps of flow-cum-crack analysis us ing three-dimensional 32 nodded isoparametric elements together with l ine and bond-linkage elements. An endochronic model is used in which a provision is made for the increment of inelastic dialatancy variable, shear and bulk moduli. A set of material parameters obtained by fitti ng numerous test-data is used for the non-linear analysis of the Oldbu rg containment vessel. The endochronic model is then extended and is l inked to a cracking analysis within the computer program OBAID. Certai n analytical results such as displacements for low and high pressure-o ver pressurization are obtained. The results show agreement in certain areas with those obtained by other methods, and some disagreement at other areas of the solution domain.