OrlandoTaddeo87
Civil/Environmental
- Jan 28, 2015
- 24
Hi guys!
I'm trying to model a bolted connection in Abaqus/standard. I have to perform a static Analysis, but due to the high number of contact interactions, the analyses are sometimes impossible to perform (aborts due to errors, physically meaningless results).
So, I decided to use Abaqus/Explicit instead of Abaqus/Standard, because one my colleagues told me that it's more probably to obtain the solution for a complex model, using this procedure.
I only know that the difference between Abaqus/Explicit and Abaqus/Standard is that the former can perform dynamic analyses, taking into account the mass of the model. But I have to perform a static analysis, so I have to apply loads REALLY SLOWLY. In particular, I have to apply a displacement and obtain a relation between the reaction force and this displacement.
First, I tried to use Abaqus/Explicit with a very simple model, a cantilever beam, but I obtained "strange" results. The reaction force of the encastre was different to that I'd obtained with Abaqus/Standard, and it varied much during the analysis; moreover, the final value was much different (lower) to the value obtained with a "classical" static analysis with Abaqus/Explicit.
Do you know some "rules" that I have to respect in order to perform an "equivalent" static analysis with Abaqus/Explicit?
In particular, when I define the steps, the "Time period" what correspond with? I mean, when I perform a static analysis in Abaqus/Standard, I set that value to 1, and 1 is the entire time of the analyses.
I also set to 1 the lenght of the diplacement path (that is the step time, practically).
How I have to manage these parameters in Abaqus/Explicit? There is a particular relation between the "Time period" and the Step time? (Consider that my analyses have only 1 step).
Thank you very much for reading my post so far.
I'll be grateful to everyone that will want to help me, even with little suggestions.
Thanks, Orlando
I'm trying to model a bolted connection in Abaqus/standard. I have to perform a static Analysis, but due to the high number of contact interactions, the analyses are sometimes impossible to perform (aborts due to errors, physically meaningless results).
So, I decided to use Abaqus/Explicit instead of Abaqus/Standard, because one my colleagues told me that it's more probably to obtain the solution for a complex model, using this procedure.
I only know that the difference between Abaqus/Explicit and Abaqus/Standard is that the former can perform dynamic analyses, taking into account the mass of the model. But I have to perform a static analysis, so I have to apply loads REALLY SLOWLY. In particular, I have to apply a displacement and obtain a relation between the reaction force and this displacement.
First, I tried to use Abaqus/Explicit with a very simple model, a cantilever beam, but I obtained "strange" results. The reaction force of the encastre was different to that I'd obtained with Abaqus/Standard, and it varied much during the analysis; moreover, the final value was much different (lower) to the value obtained with a "classical" static analysis with Abaqus/Explicit.
Do you know some "rules" that I have to respect in order to perform an "equivalent" static analysis with Abaqus/Explicit?
In particular, when I define the steps, the "Time period" what correspond with? I mean, when I perform a static analysis in Abaqus/Standard, I set that value to 1, and 1 is the entire time of the analyses.
I also set to 1 the lenght of the diplacement path (that is the step time, practically).
How I have to manage these parameters in Abaqus/Explicit? There is a particular relation between the "Time period" and the Step time? (Consider that my analyses have only 1 step).
Thank you very much for reading my post so far.
I'll be grateful to everyone that will want to help me, even with little suggestions.
Thanks, Orlando
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