Traditional Crack Modeling Falls Short When the Crack Path Isn't Known in Advance

Classical fracture modeling techniques only allow a crack to propagate along predefined element boundaries, which means the crack path needs to be known in advance, and meshing around it is often time consuming to set up. In many real problems, especially where crack initiation location and propagation direction are not known upfront, this constraint makes traditional approaches impractical or requires excessive remeshing effort as the analysis progresses.

Webinar Scope

In this online training, 12Simulate will introduce the Extended Finite Element Method (XFEM) in Abaqus, a technique that allows cracks to be located within the interior of an element, independent of the mesh. Participants will learn the basic concepts behind XFEM, how damage is modeled using both cohesive and LEFM based approaches, how to build an XFEM fracture model from scratch, and see real examples covering crack initiation, low cycle fatigue, mixed mode propagation, and delamination.

Topics Covered

• Fracture mechanics fundamentals: fracture modes and the stress intensity factor

• Limitations of traditional crack modeling methods

• XFEM basics: mesh independent crack modeling and its advantages

• Core XFEM ingredients: displacement enrichment and the level set method

• Contact modeling on XFEM based crack surfaces

• Damage modeling: cohesive damage versus LEFM based damage (VCCT)

• Building an XFEM fracture model: damage criteria, enrichment regions, and analysis controls

• Output quantities for visualizing and evaluating cracks (PHILSM, STATUSXFEM)

• Example applications: crack initiation and propagation, low cycle fatigue, mixed mode propagation, delamination, and contour integrals

• Known limitations of XFEM modeling

Who Should Attend?

• Simulation engineers modeling fractures, cracking, or delamination

• Analysts working on structures where crack location or path is not known in advance

• Engineers dealing with composite failure, fatigue cracking, or bond line fracture

• Anyone frustrated by the meshing effort required for traditional crack modeling approaches

Prerequisite

• 12Simulate Abaqus customer