# PFC **URL:** https://forum.itascainternational.com/c/pfc/9.md?page=1 [Latest](https://forum.itascainternational.com/latest.md) · [Categories](https://forum.itascainternational.com/categories.md) · [Tags](https://forum.itascainternational.com/tags.md) **Page:** 2 --- ## [Servo gain and strain rate for triaxial test simulations](https://forum.itascainternational.com/t/servo-gain-and-strain-rate-for-triaxial-test-simulations/2049)
**Author:** [@Mussie](https://forum.itascainternational.com/u/Mussie)\ **Replies:** 1\ **Last updated:** [April 24, 2025, 4:28pm UTC](https://forum.itascainternational.com/t/servo-gain-and-strain-rate-for-triaxial-test-simulations/2049 "2025-04-24T16:28:35Z")
Hi everyone, I am looking for a proper guidline on how to find reasonable values for strain rate and servo gain. I would like to perform a triaxial test on a particle assembly using the rrlinear contact model. I know ab… --- ## [Dynamic Input Wizard](https://forum.itascainternational.com/t/dynamic-input-wizard/2041)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 1\ **Last updated:** [April 14, 2025, 2:37pm UTC](https://forum.itascainternational.com/t/dynamic-input-wizard/2041 "2025-04-14T14:37:49Z")
I want help in simulating dynamic slope stability in PFC and saw “dynamic Input Wizard” and can anyone tell me how can I use it and example of what type of input file to be given. Thankyou, --- ## [HELP NEEDED: uniaxial and triaxial test](https://forum.itascainternational.com/t/help-needed-uniaxial-and-triaxial-test/1787)
**Author:** [@apo16](https://forum.itascainternational.com/u/apo16)\ **Replies:** 3\ **Last updated:** [March 26, 2025, 3:27pm UTC](https://forum.itascainternational.com/t/help-needed-uniaxial-and-triaxial-test/1787 "2025-03-26T15:27:34Z")
I am working on the example of “Genesis and Testing of a Soft-Bonded Material”. The goal is to obtain a strength value from the uniaxial test, and a few triaxial tests to calculate cohesion and friction angle to be used … --- ## [CFD-DEM issue(how to modify the CFD-mesh created in PFC)](https://forum.itascainternational.com/t/cfd-dem-issue-how-to-modify-the-cfd-mesh-created-in-pfc/2002)
**Author:** [@LJYpyu](https://forum.itascainternational.com/u/LJYpyu)\ **Replies:** 1\ **Last updated:** [March 24, 2025, 11:23am UTC](https://forum.itascainternational.com/t/cfd-dem-issue-how-to-modify-the-cfd-mesh-created-in-pfc/2002 "2025-03-24T11:23:41Z")
Hello everyone! My question is simple, is there any way for me to delete or modify the cfd-mesh in PFC as I find that there’s no function for this? How about coding in-built functions? --- ## [Factor of safety calculation in PFC](https://forum.itascainternational.com/t/factor-of-safety-calculation-in-pfc/1998)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 1\ **Last updated:** [March 19, 2025, 2:25pm UTC](https://forum.itascainternational.com/t/factor-of-safety-calculation-in-pfc/1998 "2025-03-19T14:25:22Z")
I am using the Factor of safety command in PFC for the slope. is it correct ? --- ## [Triaxial test simulation](https://forum.itascainternational.com/t/triaxial-test-simulation/951)
**Author:** [@Prerna](https://forum.itascainternational.com/u/Prerna)\ **Replies:** 4\ **Last updated:** [November 28, 2023, 9:26pm UTC](https://forum.itascainternational.com/t/triaxial-test-simulation/951 "2023-11-28T21:26:04Z")
I am trying to simulate a triaxial test on a soil specimen. But as soon as we apply the confining pressure, the top and bottom plates vanish. I have attached the data file. Please suggest the required corrections. It wou… --- ## [Bonded particle modeling fish package](https://forum.itascainternational.com/t/bonded-particle-modeling-fish-package/1978)
**Author:** [@jhazzard](https://forum.itascainternational.com/u/jhazzard)\ **Replies:** 1\ **Last updated:** [March 10, 2025, 3:56pm UTC](https://forum.itascainternational.com/t/bonded-particle-modeling-fish-package/1978 "2025-03-10T15:56:30Z")
Where can I find the fish functions for building and testing bonded particle samples in PFC? --- ## [Lateral Strain and Poisson's ratio derived from measurement sphere and gage balls](https://forum.itascainternational.com/t/lateral-strain-and-poissons-ratio-derived-from-measurement-sphere-and-gage-balls/1910)
**Author:** [@Pallavi](https://forum.itascainternational.com/u/Pallavi)\ **Replies:** 1\ **Last updated:** [March 2, 2025, 12:09pm UTC](https://forum.itascainternational.com/t/lateral-strain-and-poissons-ratio-derived-from-measurement-sphere-and-gage-balls/1910 "2025-03-02T12:09:37Z")
Hello everyone, I was measuring Lateral Strain and thereby Poisson’s ratio of a UCS specimen in PFC2D. It is observed that Lateral Strain derived by measurement sphere is way greater than by using Gage Balls. I have tak… --- ## [UCS Test on Cemented soil](https://forum.itascainternational.com/t/ucs-test-on-cemented-soil/1961)
**Author:** [@sowmyaramanis](https://forum.itascainternational.com/u/sowmyaramanis)\ **Replies:** 1\ **Last updated:** [February 24, 2025, 3:56pm UTC](https://forum.itascainternational.com/t/ucs-test-on-cemented-soil/1961 "2025-02-24T15:56:43Z")
I have attached my dat and fish file below. Here I am performing UCS Test on cemented soil. I can’t able to get the proper stress vs strain curve. Here particles are not taking load, only contacts are taking load. if any… --- ## [Wall getting delete on own](https://forum.itascainternational.com/t/wall-getting-delete-on-own/1943)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 3\ **Last updated:** [February 17, 2025, 12:01pm UTC](https://forum.itascainternational.com/t/wall-getting-delete-on-own/1943 "2025-02-17T12:01:33Z")
I a code there is not any command to delete the wall but it is getting deleted when i run some command. The below image is before the command is executed and this image is after execution the wall is deleted by it… --- ## [Using the PFC3D python code without opening the GUI](https://forum.itascainternational.com/t/using-the-pfc3d-python-code-without-opening-the-gui/1947)
**Author:** [@sanan2005](https://forum.itascainternational.com/u/sanan2005)\ **Replies:** 0\ **Last updated:** [February 17, 2025, 1:44am UTC](https://forum.itascainternational.com/t/using-the-pfc3d-python-code-without-opening-the-gui/1947 "2025-02-17T01:44:39Z")
Hello everyone! Is there anyway that I can use the python code for measuring porosity of PFC3D to measure the porosity of CFD cell without opening the interface of PFC3D? Let’s say that I have the position of the partic… --- ## [Enabling gravity in the model](https://forum.itascainternational.com/t/enabling-gravity-in-the-model/1920)
**Author:** [@sowmyaramanis](https://forum.itascainternational.com/u/sowmyaramanis)\ **Replies:** 2\ **Last updated:** [February 1, 2025, 7:25am UTC](https://forum.itascainternational.com/t/enabling-gravity-in-the-model/1920 "2025-02-01T07:25:12Z")
In my model, initially the balls were confined in a box and made attain equilibrium. Later, the top wall is removed. As the system is disturbed, I have allowed it to attain equilibrium again. Despite model gravity being … --- ## [Question on Clump Density and Mass](https://forum.itascainternational.com/t/question-on-clump-density-and-mass/1904)
**Author:** [@ppk](https://forum.itascainternational.com/u/ppk)\ **Replies:** 0\ **Last updated:** [January 20, 2025, 4:57pm UTC](https://forum.itascainternational.com/t/question-on-clump-density-and-mass/1904 "2025-01-20T16:57:46Z")
When I generate a clump using a template, it always reports a volume of “1,” regardless of the clump’s size. For example, changing the radius at line 20 (radius = 2 # Radius of the sphere) does not affect the reported v… --- ## [Calibration Process](https://forum.itascainternational.com/t/calibration-process/1876)
**Author:** [@eneszengin](https://forum.itascainternational.com/u/eneszengin)\ **Replies:** 0\ **Last updated:** [January 3, 2025, 8:10am UTC](https://forum.itascainternational.com/t/calibration-process/1876 "2025-01-03T08:10:53Z")
Hi everyone, I’m generally trying to calibrate my materials using the approach suggested by Potyondy (Flat-Joint 2018). I primarily rely on the examples provided in the Material Support Package, but I’ve encountered an … --- ## [Creation of a Synthetic Rock Mass (SRM) Specimen Tutorial](https://forum.itascainternational.com/t/creation-of-a-synthetic-rock-mass-srm-specimen-tutorial/1868)
**Author:** [@eneszengin](https://forum.itascainternational.com/u/eneszengin)\ **Replies:** 2\ **Last updated:** [January 2, 2025, 7:33pm UTC](https://forum.itascainternational.com/t/creation-of-a-synthetic-rock-mass-srm-specimen-tutorial/1868 "2025-01-02T19:33:24Z")
Hi everyone, In the discussion section of the tutorial, it says, “Contacts intersecting fractures are assigned the smoothjoint contact model, and their properties are set.” However, I couldn’t find anything about this i… --- ## [May i know how ball is distributed in this range](https://forum.itascainternational.com/t/may-i-know-how-ball-is-distributed-in-this-range/1865)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 0\ **Last updated:** [December 24, 2024, 8:22am UTC](https://forum.itascainternational.com/t/may-i-know-how-ball-is-distributed-in-this-range/1865 "2024-12-24T08:22:14Z")
can anyone tell me what is the range of ball --- ## [Rigid block contact with balls](https://forum.itascainternational.com/t/rigid-block-contact-with-balls/1858)
**Author:** [@romaric.desbrousses](https://forum.itascainternational.com/u/romaric.desbrousses)\ **Replies:** 3\ **Last updated:** [December 19, 2024, 4:45pm UTC](https://forum.itascainternational.com/t/rigid-block-contact-with-balls/1858 "2024-12-19T16:45:27Z")
Hello, I am currently working on a project that involves modeling interactions between PFC rigid blocks in the shape of axis aligned boxes with PFC balls (using PFC 6.00.30). The goal of the project is essentially to st… --- ## [I want to create the clump at a particular x,y,z cordinates](https://forum.itascainternational.com/t/i-want-to-create-the-clump-at-a-particular-x-y-z-cordinates/1811)
**Author:** [@SahilW](https://forum.itascainternational.com/u/SahilW)\ **Replies:** 5\ **Last updated:** [November 22, 2024, 5:45pm UTC](https://forum.itascainternational.com/t/i-want-to-create-the-clump-at-a-particular-x-y-z-cordinates/1811 "2024-11-22T17:45:53Z")
Hi everyone, I need to create a single clump particle at a specific (x, y, z) position in PFC 7. While I am able to create a ball at a specified position using the following script: I am struggling to create a clump pa… --- ## [Self weight load of particle assembly](https://forum.itascainternational.com/t/self-weight-load-of-particle-assembly/1804)
**Author:** [@Mussie](https://forum.itascainternational.com/u/Mussie)\ **Replies:** 2\ **Last updated:** [November 20, 2024, 4:48pm UTC](https://forum.itascainternational.com/t/self-weight-load-of-particle-assembly/1804 "2024-11-20T16:48:03Z")
Hi everyone, I am trying to create a model of a large particle assembly that is than later loaded by a few walls. It is important for me to create the assembly with a specific particle size distribution and a stress dis… --- ## [Meaning of domain strain rate](https://forum.itascainternational.com/t/meaning-of-domain-strain-rate/1298)
**Author:** [@Prerna](https://forum.itascainternational.com/u/Prerna)\ **Replies:** 3\ **Last updated:** [November 4, 2024, 7:51am UTC](https://forum.itascainternational.com/t/meaning-of-domain-strain-rate/1298 "2024-11-04T07:51:17Z")
I am working on an example " Genesis and Testing of a Soft-Bonded Material" (file:///C:/Program%20Files/Itasca/PFC700/exe64/doc/pfc/pfcmodule/test3d/example\_applications/SoftBonded/softbonded.html?node3490). It uses stra… --- ## [Rolling and sliding contacts during shear test](https://forum.itascainternational.com/t/rolling-and-sliding-contacts-during-shear-test/1777)
**Author:** [@anjaliuday](https://forum.itascainternational.com/u/anjaliuday)\ **Replies:** 0\ **Last updated:** [October 28, 2024, 4:10pm UTC](https://forum.itascainternational.com/t/rolling-and-sliding-contacts-during-shear-test/1777 "2024-10-28T16:10:40Z")
Dear community, I am trying to document the number of sliding and rolling contacts during a triaxial test on sand. Has anyone implemented this already? Regards, Anjali --- ## [Help needed: Replicating PFC 2D example in PFC3D](https://forum.itascainternational.com/t/help-needed-replicating-pfc-2d-example-in-pfc3d/1540)
**Author:** [@paudyalp11](https://forum.itascainternational.com/u/paudyalp11)\ **Replies:** 3\ **Last updated:** [October 26, 2024, 7:21pm UTC](https://forum.itascainternational.com/t/help-needed-replicating-pfc-2d-example-in-pfc3d/1540 "2024-10-26T19:21:42Z")
Hi everyone, I was trying to replicate the direct shear box example given in this in PFC3D. According to the manual, the example is for PFC2D, but the same procedure would work in PFC3D. While I was able to recreate the… --- ## [Sieve analysis in PFC](https://forum.itascainternational.com/t/sieve-analysis-in-pfc/1758)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 0\ **Last updated:** [October 16, 2024, 9:12am UTC](https://forum.itascainternational.com/t/sieve-analysis-in-pfc/1758 "2024-10-16T09:12:27Z")
Can anyone share me the code of Sieve analysis in PFC --- ## [Percentage of Ball and clump Packing](https://forum.itascainternational.com/t/percentage-of-ball-and-clump-packing/1757)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 0\ **Last updated:** [October 16, 2024, 9:02am UTC](https://forum.itascainternational.com/t/percentage-of-ball-and-clump-packing/1757 "2024-10-16T09:02:28Z")
I want to know what is the percentage of ball and clump packing in my triaxial PFC sample. --- ## [Delete ball outside wall in PFc](https://forum.itascainternational.com/t/delete-ball-outside-wall-in-pfc/1622)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 1\ **Last updated:** [August 12, 2024, 2:54pm UTC](https://forum.itascainternational.com/t/delete-ball-outside-wall-in-pfc/1622 "2024-08-12T14:54:28Z")
I want to delete the ball outside my wall and not understand how to do it. The image of the geometry is attached with the message. --- ## [General question about PFC: modeling interface shear](https://forum.itascainternational.com/t/general-question-about-pfc-modeling-interface-shear/1708)
**Author:** [@paudyalp11](https://forum.itascainternational.com/u/paudyalp11)\ **Replies:** 2\ **Last updated:** [September 24, 2024, 8:57pm UTC](https://forum.itascainternational.com/t/general-question-about-pfc-modeling-interface-shear/1708 "2024-09-24T20:57:31Z")
Hi everyone. I have a basic question about the best approach to modeling interfaces such as geotextile in PFC. I am trying to simulate an interface shear test where the top box consists of balls and slides on top of an i… --- ## [I need to write the .his file showing me the radius all balls in pfc3d 7](https://forum.itascainternational.com/t/i-need-to-write-the-his-file-showing-me-the-radius-all-balls-in-pfc3d-7/1692)
**Author:** [@SahilW](https://forum.itascainternational.com/u/SahilW)\ **Replies:** 0\ **Last updated:** [September 16, 2024, 1:15pm UTC](https://forum.itascainternational.com/t/i-need-to-write-the-his-file-showing-me-the-radius-all-balls-in-pfc3d-7/1692 "2024-09-16T13:15:19Z")
I want to save the ball radius using Fish code. Can anyone help me modify the following code to save the radius of each ball with ball identity in any format such as .txt, .dat, etc? I am attaching the shortcode: loop f… --- ## [Monitoring momentum of a wall (includng servo mechanism)](https://forum.itascainternational.com/t/monitoring-momentum-of-a-wall-includng-servo-mechanism/371)
**Author:** [@Mussie](https://forum.itascainternational.com/u/Mussie)\ **Replies:** 10\ **Last updated:** [September 12, 2024, 9:51pm UTC](https://forum.itascainternational.com/t/monitoring-momentum-of-a-wall-includng-servo-mechanism/371 "2024-09-12T21:51:39Z")
I would like to simulate a shear test on a ring shaped specimen contained within bottom, top rings and bottom, top plate. A servo-wall is used to apply 100kPa normal stress on the top plate in z-direction. The bottom rin… --- ## [Activating the JKR Contact Model in UCS test](https://forum.itascainternational.com/t/activating-the-jkr-contact-model-in-ucs-test/1671)
**Author:** [@Ymustafa](https://forum.itascainternational.com/u/Ymustafa)\ **Replies:** 0\ **Last updated:** [September 2, 2024, 12:43pm UTC](https://forum.itascainternational.com/t/activating-the-jkr-contact-model-in-ucs-test/1671 "2024-09-02T12:43:56Z")
Hello, I am trying to simulate the UCS test on soil using the JKR model. I created the particles and bonded them with linear model and, then, before applying the UCS, I installed the JKR model between the particles but … --- ## [Error while running Rock test example in PFC](https://forum.itascainternational.com/t/error-while-running-rock-test-example-in-pfc/1656)
**Author:** [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\ **Replies:** 0\ **Last updated:** [August 27, 2024, 11:31am UTC](https://forum.itascainternational.com/t/error-while-running-rock-test-example-in-pfc/1656 "2024-08-27T11:31:24Z")
I am trying to run and simulate the rock test. The error that I am getting is shown in the figure. Also, the results for the UCS measurement are negative. But with similar data, when UCS is measured with the sleeved tr… [Previous page](https://forum.itascainternational.com/c/pfc/9.md) [Next page](https://forum.itascainternational.com/c/pfc/9.md?page=2)