Hello everyone,
I want to use ABAQUS for underground mine design. the top surface is highly variable, in other words, parts of the mine is overlain by mountain and others are overlain by valley), moreover it is very irregular. Hence, the vertical load will be different.
My question is how how...
Hello everyone:
Let me first tell you what is a violent failure of a coal (or rock) specimen under compression loading in the laboratory. It is a brittle failure where sudden loss of strength occurs, with very high noise (like bump) moreover, coal particles ejected very fast from the edges and...
Hello my friends:
I want to use Abaqus subroutine (User defined field variable)in my model, however i am not familiar with FORTRAN. So i need to learn FORTRAN first, so what release of FORTRAN should i learn? is it FORTRAN 77? I am asking this question because i know that there are newer...
Hello Abaqus users,
I am using Abaqus Explicit to squeeze a deformable body between two rigid platens. The test is quasi-static, and the friction formulation between the rigid body and the deformable body is penalty where the coefficient of friction is 0.3.
I assume a limit for the shear...
Hello
I know that Abaqus standard ensures the static equilibrium, which means satisfying the following: stress-strain relationship + equilibrium equations + the compatibility equations. While Abaqus explicit ensures dynamic equilibrium. What does it mean?
Thanks for the explanation
Hello Abaqus users,
I need to extract S33 at the integration point for specified element set (set-1) using python. is there any ideas or if someone already did that before and want to share his experience with me, i would be very glad.
please help me.
Thanks
Hello There,
I want to model a room and pillar mine, so my task is to ensure that the pillars are safe and stable. I will use Abaqus software,
In ABAQUS, i need to input the material properties, i have the material properties for laboratory samples (2 in high, 1 in diameter). As you know, the...
Can somebody help me explain some results.
i am squeezing part-A between part-B and Part-C, so part-A is sandwithced btween part-b and C, Parts-B and C have the same mechanical properties (same Young's modulus and poisson's ratio).
I ran the model two times, in the first time, the ratio of...
Hello there,
I want to model an underground coal mine, the mine is overlain and underlain by different kinds of rock such as Sandstone, Shale,.......etc. I have the laboratory test results for samples of these rocks, the height of the sampel is 2.0 in and the diameter is 1.0 in
We know from...
Hello,
I know that the time period is irrelvant in the static analysis, so the default is 1.0.
I am using abaqus implicity with quasi-static (*Dynamic, application = quasi-static, initial = no)
the model is just uniaxial compression test for a piece of rock, however due to material and...
Hello.
I need to draw the stress-strain curve for a specified set. since the model is very big, i used python to extract the S33 and LE33
I used this code to extract the S33 and LE33 for set called Coal-1.coal
session.xyDataListFromField(odb=odb, outputPosition=INTEGRATION_POINT...
Hello Everybody,
I know how to draw X-Y data like Stress-strain curve, however my model is very big, so I can not select the whole model because the number of elements is very big, I need to divide it into smaller parts. I found that i need to divide my model into 25 parts, then extract the X-Y...
Hello.
I used Abaqus explicit dynamic to simulate the uniaxial compression test.
First, I used a displacement control to compress a deformable rock sample using two rigid platens, where one of them is fixed and the other can move.
The movable platen is forced to move 0.02 in. i found the...
Hello Abaqus users,
I modeled Uniaxial compression test of a Rock sample using abaqus explicit. Although the test is Quasi-static, however due to the high load applied, the material is subjected to high non-linearity, so Abaqus implicit always diverges.
The element size of rigid platens is 3...
Hello Abaqus users,
I guess i need a trick to complete the model since 99% of the job was already done, I got many warning messages such as:
solver problem. Zero pivot when processing D.O.F. 3 of 1 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_3_2_653_1_1...
Hello There,
I am running a geostatic step for my model, the model is composed of 3 layers Roof, coal, and floor. the coal layer is sandwitched between the roof and the floor. When i run the geostatic step, i found that the roof and the floor penetrate the coal layer completely and they touches...
Hello
I am modeling an underground opening. the model is composed of three rock layers, the coal layer where i made the opening. This coal is sandwitches between two strong sandstone layers .
There is a contact between the coal layer and the other two sandstone layers. the model is elastic...
Hello
I need to optimize the topology, where the elastic strain energy is minimum while the dissipated energy is maximum in the model.
The problem is I do not see the dissipated energy in the available selection in the design response. I can see the following in the design response: elastic...
Hello
I modelling the uniaxial compression test for 6 rock samples. the cross-sectional area of the modeled rock samples are 1x1 inch2, 2x2 inch2, 3x3 inch2, 4x4 inch2 , 5x5 inch2 and 6x6 inch2, while the height of all samples is the same which is 1.0 inch.
The material behavior used in the...
