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Foundation ::
Finite Element Analysis ::
ZIP3D
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ZIP3D
An Elastic and Elastic-Plastic Finite-Element Analysis Program for Cracked Bodies
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Total downloads from Open Channel to date: 198
SOURCE CODE AVAILABLE
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ZIP3D is an advanced finite element program developed to analyze cracks in three dimensional elastic or elastic-plastic bodies. The program calculates mixed-mode
fracture mechanics parameters in cracked solids. However, bodies without cracks may also be analyzed to obtain stresses, strains, and displacement fields.
ZIP3D uses eight-node isoparametric elements and small-strain deformation theory. A special reduced-shear integration scheme is provided for bending-dominant
problems. The elastic-plastic analysis is based on the incremental plasticity theory using the von Mises yield criterion, isotropic hardening, and Drucker's Flow rule.
The initial-stress algorithm is used in this analysis. Three types of material stress-strain curves may be modeled:
- elastic-perfectly plastic,
- Ramberg-Osgood, and
- multilinear representations.
Some unique features of ZIP3D are:
- The computation of mixed-mode strain-energy release rates for elastic solids using a 3-D virtual-crackclosure technique;
- the calculation of the J-integral for elasticplastic materials using the equivalent domain integral method;
- the capability to extend the crack under monotonic or cyclic
loading; and
- the capability to close or open the crack faces during cyclic loading.
ZIP3D is written in FORTRAN 77 for batch or interactive execution on the CRAY-2, CRAY X-MP and CRAY Y-MP series computers running a UNICOS operating system. Analyzing large models can require as much as 16M words of memory. The utility to unarchive the files, PKUNZIP.EXE, is included. A PC is required to extract the files before moving the program to the CRAY platform. ZIP3D was developed in 1990.
ZIP3D carries the NASA case number LAR-14611. It was originally released as part of the NASA COSMIC collection.
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