Case 3 Extension With Slow Sedimentation Rate

 

The sedimentation rate is modified by changing the initial height of the sedimentation horizon, the reference displacement magnitude and the time curve defining the motion.

 

Sedimentation_horizon

Data File

 

 

* Sedimentation_horizon NUM=1

! ---------------------------------

 Name         "General"

 Facet_topology   IDM=2 JDM=1

     1 2

 Coordinates IDM=2 JDM=2

     0.0  28.0

   200.0  28.0

   Time_curve  1000

   Displacement             IDM=2

    0.0   6.0

 

* Load_curve_data NUM=1000

! ---------------------------------

 Time_curve IDM=2

      3          6

 Load_factor  IDM=2

      0          1

 

1The initial horizon height is increased from 25mm to 28mm

2The reference displacement magnitude is reduced from 20mm to 6mm

3The time curve defines movement between time t=3.0 and t=6.0

 

The result files for the project are in directory: mech_003\exercises\Case 3\results.  The contour plot for plastic strain show that three thinner layers of sediment are deposited, with the first two layers being confined to the rift valley.   The shear bands in the pre-kinematic sand layer propagate into the syn-kinematic layers with increasing extension.

 

mech_003_case3_01

Contours of Plastic Strain at Time t=6.0

mech_003_case2_05

Configuration of Material Grid at Time t=3.0

mech_003_case3_04

Configuration of Material Grid at Time t=4.0

mech_003_case3_03

Configuration of Material Grid at Time t=5.0

mech_003_case3_02

Configuration of Material Grid at Time t=6.0