a Reference for CAE Users Modeling onset and propagating of crack using ABAQUS Modeling cracks in finite element software is done in several ways. In general, these methods can be divided into two categories: traditional methods and modern methods. The traditional method is to include two methods: Surface-based cohesive behavior Virtual crack closure technique In traditional methods, simulating onset and propagating of cracks, need to design meshing of model regarding to crack propagation probability. If the model is also considered to simulate opening and propagating of crack, it would be far more complex and harder. In this method crack opening direction should be predicted and elements faces should be in this direction. Also at the crack tip, singularity for the elements should be defined. The new method, called the Extended Finite Element Method or XFEM many complexities and limitations of methods by using enriched elements have been fixed. In this example we will investigate opening and propagating of crack in a steel plate using XFEM method. Sheet dimensions are 6*3 units and at the beginning there is a 1.5 unit long crack in the middle of it. Sheet is under longitudinal and transverse forces at two ends, making the crack to open and propagate. Part / Sketch First in part module, make 2D part and name it “Plate”. Using dimensions command to make it 6*3. We will come back to part module again later. Property In property modules, we define the desired material. Submit your material as defined in the previous examples. Posted on April 12, 2012 by Babak 24
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a Reference for CAE Users
Modeling onset and propagating of crack using ABAQUS
Modeling cracks in finite element software is done in several ways. In general, these methods can be divided
into two categories: traditional methods and modern methods.
The traditional method is to include two methods:
Surface-based cohesive behavior
Virtual crack closure technique
In traditional methods, simulating onset and propagating of cracks, need to design meshing of model regarding
to crack propagation probability. If the model is also considered to simulate opening and propagating of crack,
it would be far more complex and harder. In this method crack opening direction should be predicted and
elements faces should be in this direction. Also at the crack tip, singularity for the elements should be defined.
The new method, called the Extended Finite Element Method or XFEM many complexities and limitations of
methods by using enriched elements have been fixed.
In this example we will investigate opening and propagating of crack in a steel plate using XFEM method. Sheet
dimensions are 6*3 units and at the beginning there is a 1.5 unit long crack in the middle of it. Sheet is under
longitudinal and transverse forces at two ends, making the crack to open and propagate.
Part / Sketch
First in part module, make 2D part and name it “Plate”. Using dimensions command to make it 6*3. We will
come back to part module again later.
Property
In property modules, we define the desired material. Submit your material as defined in the previous examples.