PFA - Discrete Cohesive Zone Model (PFA_DCZM)

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Product Highlights:

·          Discrete Cohesive Zone Model (DCZM) is a fracture mechanics based approach for progressive crack growth analysis integrated into GENOA-PFA. The technique  

o         Is based on the bi-linear spring element

o         Is insensitive to FEM mesh size

o         Avoids the use of "singular" crack elements. As a result, extensive mesh preparation is eliminated

o         Is computationally efficient due to the use of the node-based displacements and forces

o         Requires a fracture path to be predetermined based on either: 1) experimental testing; 2) a preliminary GENOA/PFA analysis; or 3) the user experience. The predetermined path can be effectively prescribed using the GENOA GUI

o         Can be used to model material softening

o         Requires fracture toughness, cohesive strength and cohesive stiffness as input The fracture toughness test data can be obtained from testing, material handbooks, or from GENOA-FTD

o         Requires test calibration to determine the best combination of cohesive strength and cohesive stiffness.

Applications/Benefits: