Dynamic Explicit Analysis for Column Loss in Flat Plate Building?

Hello Everyone,

I am trying to define a non-linear spring element in Abaqus using the following values.

-8505.0193, -40

-6854, -30

-5514.401, -20

-4075.366, -10

0, 0

4075.366, 10

5514.401, 20

6854, 30

8505.0193, 40.

It is working fine with positive values. But when I define zero or negative values. it is showing an error as

"The independent variables must be arranged in ascending order. This error may have been caused by a possible empty line on the datacards in the property definition."

hello, i am modelling a RC slab in Abaqus, the slab is supposed to fail in punching shear which is a sudden failure. i defined the nonlinear behaviour of concrete using concrete damage plasticity model, but i can't reach the desired results as the failure is not sudden (load-deflection curve shows that the load is decreasing gradually after reaching its max value, an it's supposed to be a rapid degradation not a gradual one). as well as, i know that whenever i there is a localization of cracks somewhere in the model (which is the case in my model), using concrete damage placticity model may make the results mesh-dependant. so what should i do? should i use GFI? or do i need to use concrete smeared crack model to simulate the nonlinear behaviour of concrete instead of using concrete damage placticity model?

thank you in advance.

Dear all

It is generally very confusing how to define knn kss and ktt, some videos on the internet directly specifies them as elastic modulus, some videos defined them using E/Enn, E/Ess and E/Ett using traction type of the elastic properties, can anyone professional please clarify this isssue?

Thank you very much.

I am using SANISAND to simulate a triaxial compression test under monotonic loading. But every time my simulations break and give the same message "Abaqus/Implicit Packager exited with an error - Please see the status file for possible error messages if the file exists." There is no message file to look for the specific problem.

Is it has to do anything with the new Intel one API software? Recently, I have been upgraded to ABAQUS 2019. But previously, when tried with the Abaqus 2014 version, the program ran successfully. I am not sure whether it has anything to do with the software configuration.

Can anyone please suggest a solution? I really appreciate any help you can provide.

Hello,

I am trying to connect two beams by scripting in Abaqus, I have connected the beams by Spring Element type 2, and I want to give different stiffness to the spring in each direction. Can anyone knows how can I do it?

I wish to find out thickness variation in my model, so for that which one I should choose among PEEQ, PE and LE ??

Dear Sir,

I am doing web crippling analysis and it requires more time to converge. I used Dynamic explicit method. Is there any way to reduce the time taken to run instead of changing mesh sizes. Go with the static general may not give accurate results as loads increments are applied using UTM. If there is any way to reduce the run time Please be kind enough to let me know.

Thank you.

I have defined 2 beams in abaqus script, now I need an element to connect them, I have written the following lines in order to connect them:

*ELEMENT,TYPE=SPRING2,ELSET=SPG1

10401,1001002,11010002 (number of element,first node, second node)

*SPRING,ELSET=SPG

1 (degree of freedom)

700000 (spring stiffness)

but I receive this error

ERROR: ELEMENT 10401 IS MISSING A PROPERTY DEFINITION; CHECK ELEMENT SET

AND ELEMENT DEFINITIONS

does anyone know the solution?

I want to place some sensors on a 2D sample, but if possible, I want to avoid using partitions (to avoid increasing my mesh complexity, as my system is a bit slow). Also, I don't want to create sets that depend on nodes or elements, because I will be trying different meshes (for convergence analysis) and I would have to reset the sets every time, which is not ideal.

My idea was to create several "display bodies" that would follow different reference points (more than one). I don't mind that the display bodies don't "sense" -I will probe the values manually-, they are just to indicate the positions I want to probe in the sample once it's deformed (when I use a fine mesh it becomes difficult to track each point). I attach a picture as an example of what I want, in which I show a display body (a small circle) which would represent my sensor, before and after the deformation. Note that this example was made using a partition and a very coarse mesh just to test the system.

What type of connection, constraint or interaction could I use to tie a reference point to a certain location on a sample, so that it moves following the same deformation as the elements on that area? The material is non-linear (hyperelastic), so the ref. points can't be tied to far away geometries.

Thank you for any input!