Problem importing void ratio from a model to orphan mesh in a different model of the same CAE file

[Sufyan2014]

Hi Everyone.

I have a problem with transferring the final void ratio in a model to a new model. I am only interested in the final void ratio of one of the instance called soil-1. Other instance in the original model was not needed.

In the new model, I have specified a predefined field for void ratio using the odb file of the previous model. The new instance was created by importing an orphan mesh from the old instance of the old model. The imported instance is undeformed.

Using similar method I have managed to import stress and pore pressure. However, ABAQUS also provided such facility to import initial void ratio from an ODB file. All files are located in the same directory. Both the old model and the new model is created in the same CAE file.

Examples of the keyword generated in the inp file is as below:
** Name: PORField Type: Pore pressure
*Initial Conditions, TYPE=PORE PRESSURE, file=C:/Temp/INPJob14032014GroutTx0D.odb, interpolate
** Name: VRField Type: Void ratio
*Initial Conditions, TYPE=Ratio, file=C:/Temp/INPJob14032014GroutTx0D.odb, interpolate

Unfortunately the request was'nt process and the error reported as follows:
Error in job INPJob14032014PileTestTx_Bulge: Permeability is specified on 1308 elements but the initial void ratio is not defined. Use *initial conditions to the value. The elements are identified in element set ErrElemPermNoInitVoidRatio.

Some blogs suggested the use of driving elsets to specify the exact elements. I have tried to modify the inp keyword for the VRField as follows.
** Name: VRField Type: Void ratio
*Initial Conditions, TYPE=Ratio, file=C:/Temp/INPJob14032014GroutTx0D.odb, interpolate, driving elsets
assembly.soil-1.allelem, assembly.soil1.allnode

Once datacheck is initiated, abaqus tells me that the nodes do not exist in global element with the following error statements:
Error in job INPJob14032014PileTestTx_Bulge: The global element set ASSEMBLY.SOIL-1.ALLELEM specified on the *Submodel option was not found in the output database for the global model.
Error in job INPJob14032014PileTestTx_Bulge: The driven node 1 for part instance SOIL-1 does not belong to any element from the specified global element set ASSEMBLY.SOIL-1.ALLELEM. Check coordinates, submodel exterior tolerance parameters, and the global element set definition
...and so on for all driven nodes

Any idea how I can put this right.
Thank you.

 

[Sufyan2014]

Hi Guys
have managed to import the void ratio to the new model from the old odb file. The problem lies in how we generate the odb to be read in later by the new model inp file. The following are needed to make it happen:
1. The name of relevant nodal set and element set must be the same in both the old odb file and the new inp file.
2. The nodal and element output must be specifically specified. For example
for the POR parameter, the nodal output for the specific nodal set must be present in the old inp file NODAL OUTPUT
for VOIDR parameter, the element output for the specific element set must be present in the old inp file ELEMENT OUTPUT
3. The VOIDR parameter must be calculated at the nodal point by including keyword POSITION=NODES in the old inp file after the ELEMENT OUTPUT... keywords.

Once the old odb file is generated. The new inp file is submitted. The generated file is able to import POR and VOIDR.

It doesn't matter if the old odb file has other parts not relevant to the import works. The new model can also have new parts apart from the relevant part imported from the old odb file.