Development and Implementation of Element Deletion Algorithm into an Open-Source Software Based on the Fracture Locus...

Area of Science:

• Computational mechanics
• Materials science
• Finite element analysis

Background:

• Accurate fracture simulation relies heavily on reliable material models.
• Predicting ductile damage and failure initiation is crucial but challenging.
• Representing fracture growth accurately remains a significant hurdle in material modeling.

Purpose of the Study:

• To develop and implement an element deletion algorithm for improved fracture simulation.
• To enhance the accuracy of predicting fracture growth in material models.
• To integrate this algorithm into open-source finite element software.

Main Methods:

• An element deletion algorithm was developed and implemented in open-source finite element software.
• Deleted elements were replaced with virtual low-stiffness material cells.
• The algorithm's functionality was validated through 2D simulations on multiple geometries and a 3D lattice structure.

Main Results:

• The algorithm successfully predicted failure initiation, crack nucleation, and fracture growth in 2D simulations.
• In 3D simulations, the onset and initial fracture region were accurately captured.
• Convergence issues were noted in 3D simulations, impacting fracture growth visualization.

Conclusions:

• The developed element deletion algorithm shows promise for accurate fracture simulation.
• The algorithm demonstrates capability in predicting key aspects of material failure.
• Further improvements are suggested to enhance computational functionalities and address convergence issues.