Crack Growth Simulation Techniques

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Crack Growth Simulation Techniques in CRACK3D

     So far there are three approaches of crack growth simulation techniques having been implemented to CRACK3D to meet users various needs, (1) nodal pair releasing approach, (2) local remeshing approach and (3) cohesive zone model.  Each approach has its advantage.  Nodal pair releasing approach is useful for users to reconstruct data of crack growth history along a known crack path and to understand failure mechanism of material (e.g. why and how it happened).  Local remeshing approach is efficient for predicting when and where failure will occur in structures.  It is also helpful for researchers to verify their fracture criterion proposed. Cohesive Zone Model (CZM) can also be used to predict the initiation and growth of cracks in structures.

     For more information about the methodology and computational aspects of crack growth simulation, please refer to the publication (Zuo, Deng, Sutton, Proceedings of ASME International Mechanical Engineering Congress, 2004).


Crack Growth Simulation Using Nodal Pair Releasing Techniques (Figure 1)

Fig 1. Schematics of nodal pair releasing approach


Crack Growth Simulation Using Local Remeshing Techniques (Figure 2)

Fig 2. Schematics of local remeshing approach


Crack Growth Simulation Using Cohesive Zone Model (CZM)

Fig 3. Schematics of cohesive zone modeling


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