hi, i am using connector - jin + cardan to connect 2 beam elements; a beam and a column.

i applied a tip load to the edge of the beam in abaqus standard. for the connector, i keyed in the elastic properties and the plastic properties in terms of plastic moment and plastic rotation.

the tip of the beam has displacement but when i specify output for the connector, moment, force and rotation at the connection. all the outputs are zero. i have tried to name the column node as the first node and the beam node as the second node and vice versa, but it does not work. and when i zoomed into the results view, it seemed that the beam is detached from the node at the column at the connector; the beam does not seem to bend.

Hi friends,

I am running a Abaqus Standard simulation for about 1.5
days. When I checked it now, the computer experienced a unexpected shutdown due
to power failure. I opened the CAE file and recovered the data. It still shows
that the simulation is running but it is actually not running.

How can I restart the analysis from the point where it
stopped. I am wary to click the restart under Edit Job because I am not sure if
that will cause the analysis to restart from time 0.

Urgently need advice on this. Thank you.

Hi all,

I am modeling a RC element subjected to stress and i am interested to determine the deflection of the element. I am using Abaqus Standard with static-general step. 

It seems that I have instability issue and I used automatic stablization technique to stabilize the problem. I am currently using "Specified disipated energy fraction = 0.0002" with a default of 0.05 for max ratio of stabilization to strain energy.

I am running the model with 8 multiprocessors. After running for 30 hours, I am only 0.068 secs into the time step of 1 sec. I suspect I am either using the wrong automatic stablization technique or using the wrong factors.

Hi,

I have a structure which is made up of continuum elements and beam elements joined together. I tried to join the beam elements to continuum elements by tie and coupling (I tried both distributing and kinematic coupling).

There are 2 general-static steps, first a vertical load and then a tip load. For both tie and coupling approach, Abaqus Standard give me aborted runs because the time increment is too small. I tried all ways of stablization but it still would not run.

For coupling, Abaqus also gives me warning that the mesh density of the beam elements should be smaller than the continuum elements.

Can anyone advise me what is the right way to connect the beam and continuum elements?

Thank you very much.

Hi all,

I am trying to model a reinforced concrete structure. As the structure is large, our intention is only to model the detail reinforced concrete elements for a small area of interest. For other portion of the structure, our intention is to model the reinforced concrete element by beam elements. I converted the reinfored concrete section to a uncracked transformed section, where the reinforcement has been converted to concrete. Then I used beam elements to model the uncracked transformed section, connect them to the detail reinforced concrete portion being modeled and run the simulation. 

hi all,

I have a solid 3D part made of concrete. I would need
the results of a few points inside the concrete. However, I realised it
was not easy to pick them when doing a Set because the nodes are hidden
(they are not on the surface. I have 1) partition my model exactly at
the points when I need to pick 2) i name the points as datum points.

Using the CAE interface, how can i pick this nodes? I have attached a pic for better understanding. Can anyone please advise?

Thank you.

hello everyone,

I am trying to model a concrete element subjected to static load using Abaqus Standard. For concrete, I am using Concrete Damaged Plasticity and beam elements for my reinforcement. I am embedding my reinforcement into the concrete (host elements).

Since I started, I faced several issues. They are overconstraint, numerical singularity and negative eigen values. I managed to resolve both of them. However, the behavior from my model is nowhere near the experimental data that I have. It seems that the model is excessively stiff.

I have checked my material model's stress-strain, tried finer elements but it does not help. I am really lost as in why the model is stiff and I am not getting results near the experimental data. 

hi, i am using Abaqus standard to model a reinforced beam-column connection subjected to a tip load at the end of the beam. 

i first applied a gravity load followed by a tip load at the end of the beam. halfway through the application of the tip load, abaqus standard
stop and give 2 errors.

1) overstraint at certain nodes of my longitudinal reinforcement

2) negative eigen values

i did research on this and some people said it might be due to insufficient number of boundary conditions (in the right places) to prevent rigid body motion under the action of the applied force. i rechecked and re-assign my boundary conditions but the same error still occurs.

Hi,

I am trying to model a reinforced concrete element in Abaqus. I have been running a couple of models for a few weeks. Recently, I tried to validate an new experiment but ran into this error, "The Plastic Strain At First Yield Should Be Set To Zero". For my steel material model, i used elastic = 29520ksi and for the plastic, i keyed in the yield stress followed by the plastic strain. At the first input, plastic strain is zero for the initial yield stress. 

I really do not know what is wrong. According to Abaqus, that is how you key in the yield stress and plastic strain. I have attached an excel sheet and a pdf showing the error screen. Hope someone can kindly advise me. Thank you.

With Regards,