DiekA Frequently Asked Questions

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Q. I use keywords as described in the manual, but DiekA responds that the keyword does not exist.

A. The keywords are read in blocks. *DIMENSION can only be used as first command (after title), followed by the definition of nodes and then the elements. Before *ELEMENTS also bandwidth optimization and output switches may be used, no other keywords. After *ELEMENTS optionally *CONNECTS and *SUPPRESS can be used in that order. Thereafter all other keywords can be used, but all keywords up to *SUPPRESS may not be repeated.

Q. DiekA fails to read an input file that worked for someone else. It gives:

*** EXECUTION IS NOT TERMINATED

BUT CALCULATION MAY BE INCORRECT***

HINT: Maybe forgotten the closing EOG or EOD ?????

OTHER TYPE FOUND WHILE EXPECTING INTEGERS

What is wrong here?

A. The input file should be consistent with the file system. E.g. files that were made on Windows will not run correctly on Unix/Linux machines because of different line break conventions. Sometimes mail-systems will automatically convert a text file to the Windows/DOS convention.

Q. How can I plot the localization data that is used in the *FAILURE tests?

A. Add the keyword "FAIL" in the *OUTPUT block. It will add the principal strain increments, the principal strain ratios and the element status (failed or not) to the nodal files.