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[Vasileios Angelidakis <question689870@xxxxxxxxxxxxxxxxxxxxx>]

Question #689870 on Yade changed:
https://answers.launchpad.net/yade/+question/689870

    Status: Open => Answered

Vasileios Angelidakis proposed the following answer:
Hi Jie,

Please find below some information on the meaning of the parameters in
the jointC.csv file:

Column 1	dip			dip angle, as in [1]
Column 2	dipDir		dip direction, as in [1]
Column 3	centreX	X-coordinate of the Joint centroid
Column 4	centreY	Y-coordinate of the Joint centroid
Column 5	centreZ	Z-coordinate of the Joint centroid
Column 6	traceX		X-dimension of joint size along the strike direction
Column 7	traceY		Y-dimenison of joint size along the strike direction
Column 8	phi_b		vector with different basic friction angle for each face. Is used only if useFaceProperties=True in the KnKsPBLaw, or else the friction angle is taken from the material (same for all the faces of the particle)
Column 9	phi_r		Not used; vector with different residual friction angles for each face. Currently considered equal to phi_b.
Column 10	JRC		Not used
Column 11	JSC		Not used
Column 12	asperity	Not used
Column 13	simgaC		Not used
Column 14	cohesion	vector with different cohesion stresses for each particle face. Is used only if: intactRock=True, useFaceProperties=True and (allowBreakage=False or cohesionBroken=False) in the KnKsPBLaw.
Column 15	tension		Not used
Column 16	jointType	Not used
Column 17				Comments

Regarding phi_b and cohesion, you don't need them, as long as you don't
want to assign different properties to each particle face and you keep
useFaceProperties=False; if this is the case, you can leave the default
values.

Regarding traceX, traceY, you can use a large value relatively to the
geometry of your problem to achieve a persistent joint, i.e. a joint
that cuts through the whole initial block.

In essence, to assign a joint you need to define values for: dip,
dipDir, centreX, centreY, centreZ inside the jointC.csv file.

Hope this helps,
Vasileios

[1] CW Boon, GT Houlsby, S Utili (2015).  A new rock slicing method
based on linear programming.  Computers and Geotechnics 65, 12-29.

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