######## WORK NOTES COPIED FROM INCIDENT 570757 ########
QUESTION:
I have a tab-delimited text file containing many stress-strain data points. I would like to use this data to define some kind of nonlinear material property law in an ANSYS/LS-Dyna explicit dynamics analysis. One of the most promising options I see is the piecewise linear plasticity model (TB,PLAW,,,,8 - see 7.2.3.11. Piecewise Linear Plasticity Model in the ANSYS/LS-Dyna Guide). One of the 3 documented suboptions for specifying nonlinear stress stain data for this option is to use "curves" defined by EDCURVE. Given the form of the data I have been provided, this is probably the most convenient suboption.
The problem I am having is that it is only possible to read the tab delimited data from the textfile into a table array (thsi is done using *TREAD). But creating a curve with EDCURVE is only possible using array parameters. What I can't figure out is how to get table array data into a pair of array parameters.
ANSWER:
The attached files demonstrate use of *VFUN to copy columns of table arrays into array parameters, followed by the definition of the power law piecewise nonlinear stress strain data for ANSYS/LS-Dyna.
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######## WORK NOTES COPIED FROM INCIDENT 570757 ######## QUESTION: I have a tab-delimited text file containing many stress-strain data points. I would like to use this data to define some kind of nonlinear material property law in an ANSYS/LS-Dyna explicit dynamics analysis. One of the most promising options I see is the piecewise linear plasticity model (TB,PLAW,,,,8 - see 7.2.3.11. Piecewise Linear Plasticity Model in the ANSYS/LS-Dyna Guide). One of the 3 documented suboptions for specifying nonlinear stress stain data for this option is to use "curves" defined by EDCURVE. Given the form of the data I have been provided, this is probably the most convenient suboption. The problem I am having is that it is only possible to read the tab delimited data from the textfile into a table array (thsi is done using *TREAD). But creating a curve with EDCURVE is only possible using array parameters. What I can't figure out is how to get table array data into a pair of array parameters. ANSWER: The attached files demonstrate use of *VFUN to copy columns of table arrays into array parameters, followed by the definition of the power law piecewise nonlinear stress strain data for ANSYS/LS-Dyna. |
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