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Problems with Abaqus/Explicit

Problems with Abaqus/Explicit

Problems with Abaqus/Explicit

(OP)
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

RE: Problems with Abaqus/Explicit

Open the Abaqus documentation and then the "Getting started with Abaqus". Read the section "Quasi-static analysis in Explicit".

RE: Problems with Abaqus/Explicit

(OP)
Thank you!
I didn't know that there was such a topic in the "Abaqus Getting started".

I'm going to study it! thumbsup

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