PAPST (Plastic Axisymmetric/Planar Structures) - Revision 2.0 Revised Documentation and Theoretical Manual

摘要

The computer program PAPST, standing for Plastic Axisymmetric/Planar Structures has been developed with the Navy with the aim of addressing the elastic-plastic crack problems which arise from material and structural considerations associated with the use of high toughness materials. Both power hardening and multilinear models for uniaxial stress-strain response are available. Enriched elements may be used to model the material crack tip response for the multilinear material model. For crack problems, both path values for the J integral and values based on the amplitude of the singular solution can be computed. The program has been used in support of laboratory programs to develop material property data for J and other pertinent parameters for fracture characterization. More recently, the capabilities of PAPST have been extended to include simulation of quasi-static crack growth. This procedure is of interest in determination of the Tearing Modulus and in assessing the stability of crack growth. Incorporated into PAPST is its predecessor APES, standing for Axisymmetric/Planar Elastic Structures. Also developed with the Navy, APES performs linear elastic fracture mechanics for Mode I and Mode II problems. It has the capability to handle crack face loadings and a limited capability to deal with orthotropic materials.