Example 6 - Two inclined fractures subjected to uniaxial compression

(1) Problem definition

Two inclined parallel fractures in an infinite rock mass are subjected to uniaxial compressive stress of 50MPa. The inclinations of the fractures are 45°. The material properties of the rock mass and fractures are the same as in Examples 1 and 3.

The fractures are found to propagate and coalesce in mode I.

(2) Input data

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TITLE

Two inclined fractures subjected to uniaxial compression

SYMMETRY -- Model symmetry

3 0.00 0.00

MODULUS - Poisson's Ratio and Young's modulus

0.25 0.40E+11

TOUGHNESS -- Gic and Giic

50. 1000.

PROPERIES -- mat, kn. ks,phi,coh

1 0.10E+13 0.10E+13 30.0 0.00E+00

SWINDOW -- xll,xur,yll,yur,numx,numy

-5.00 5.00 -5.00 5.00 30 30

STRESSES -- sxx,syy,sxy

-0.0E+07 -0.50E+08 0.00E+00

FRACTURE -- nume,xbeg,ybeg,xend,yend,kode,mat

15 0.000 0.500 1.000 1.500 2 1

CYCL 1000

ENDFILE

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(3) FRACOD2D model

The following are two snapshots for this model simmulated by using Fracod2D: