Phase 2

 

Fluke in the soil

Phase 2

 

Forces on the soil layer

 










Forces on the soil layer

As discussed before the cohesion, adhesion, inertial forces and water tension can be neglected. For the figure above, a force balance can be calculated.

 

The shear force and the normal force are related according:

                                               

 and

 

Where:

                        Internal friction angle of the sand

                        External friction angle fluke/sand

           

The grain forces will be:

 

and

 

The weight of the soil can be given as a force according:

 

 

Where:

                        Length of the fluke in the sand

                        Density of the in situ sand

                        Angle of the fluke in the sand

                        Angle of the shear zone

Horizontal equilibrium of forces:

 

 

Vertical equilibrium of forces:

 

 

Forces on the Fluke











Forces on the fluke

The force K2 on the fluke is important to determine the horizontal and vertical acting forces on the fluke.

 

The following forces are acting on the fluke blade:

The force Fp can be neglected as discussed before.