Download presentation

Presentation is loading. Please wait.

Published byGraciela Pyne Modified over 2 years ago

1
Failure Phenomenon Simulation by MPS-DEM Geotechnical Structure Elastic behavior: MPS Failure: DEM

2
Strength Parameters Tensile Strength for failure Maximum Shear Strength (not failure) 2 ctct c ij Shear Stress Normal Stress TensileCompression Initial 1 st parameter ij ctct c ij New contact 2 nd parameter Coh_l ij

3
Compression Test Homogenous Compressive Condition Step-2 Compression 1: constant x-stress 2: constant y-stress 3: enforced y-displacement, x-fix 4: x,y fix Step-1 Confining Stress 1: x-stress, 2: x-stress 3: y-stress, 4: y-fix Confining Stress 25 kN/m 2 4 3 12 10m 20m 4 3 12 x y 3

4
Compression Test Type-2 formulation 4 Number of disconnected particles 0, 1, 2, 3, 4 more than 5 magnification ratio 5.0 Failed particles appear on conjugate 45 degree line regularly Nonlinearity can not be observed in strain-stress relation, etc., It is known that the regular gird (lattice) alignment affect the failure behavior JUMP Macro Strain and Stress Strain=disp. at top/length Stress=force at top/wedth

5
Compression Test Random Model 1 Seed of random number 111113 5 Number of disconnected particle 0, 1, 2, more than 3 magnification ratio 5.0 Jump

6
6 Number of disconnected particle 0, 1, 2, more than 3 Seed of random number 111112 6 Compression Test Random Model 2 magnification ratio 5.0

7
Compression Test Comparison of lattice model and random model 7

8
Output Memo 8 Case 1 Big Model Confining Pressure=50 1.5-3.0 seconds Interaction condition Interaction Blue :initial, orange:weak Red: Dem, green:mps 2.0 秒間では ev2 がメモリ不 足 Uper, lower layer=0.4m, Seed of random number=1111112 Acceleration (H) Deviatonic Stress Axial Strain

Similar presentations

OK

Announcements This week's lab: 1-3 PM with Andrew McCarthy. Please come prepared with specific questions. There will be no lecture this Wednesday! Please.

Announcements This week's lab: 1-3 PM with Andrew McCarthy. Please come prepared with specific questions. There will be no lecture this Wednesday! Please.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Product mix ppt on nestle Ppt on acid-base indicators are large organic molecules Ppt on condition based maintenance conference Free ppt on smart note taker Ppt on review of literature sample Ppt on indian textile industries in tanzania Ppt on advanced power electronics Ppt on remote operated spy robot technology Ppt on rainy season in india Ppt on road accidents in sri