[Version 2018.01.05] LDPM material parameter (CompressiveStrength) renamed.

[zhouxinwei]

One of the static parameters - CompressiveStrength - in LDPM material model is renamed to CompressiveYieldingStrength.

The old keyword is misleading as the parameter specifies the macroscopic hydrostatic yielding stress, which is usually several times higher than the unconfined compressive strength.

This confusion has caused problems for many of our users. Therefore, instead of enforcing backward compatibility, the old keyword is removed!

Old user input is required to update this keyword in order to run.