The penetration behaviour can be modelled by using simulation
techniques in time domain.
The blocksceme of the model is given as:

As can be seen, the main contains four submodels:
- Anchor geometry
-
In order
to make a simulation program for the analysis of anchor penetration
behavior, it is important to have a good model representing the anchor
geometry.
- Penetration
-
The goal of this sub model is to
determine wheter the anchor will penetrate or if it fails.
- Failure wedge
- The goal of this sub model
is to calculate the amount of soil of the failure wedge B, as shown in the
free body diagram. Besides the amount of soil in the failure wedge the
surface area at the outside of the failure wedge has to be calculated to
calculate the friction of the soil along the fracture lines C, as shown in
the free body diagram.
- Settling
-
The goal of this sub model is to
calculate which forces and accelerations are applied to the anchor when the
blade is settling itself in
the soil.
There are also several decision points. The first decision
checks if the anchor is already'penetrating the soil or not. If it isn't, the
submodel pentration will be runned.
If the anchor fails to penetrate, the model is quit.
After some calculations, the model checks if the anchor is breaking out during
the calculated time step. If so, the model will be quit.
If the anchor is not accelarating anymore, there is force
equilibrium and the anchor is in rest. Also in this situation, the model will be
quit.
The last decision is made when the loop is completed. At that
moment, the initial position values are overruled by the new calculated values.
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