CivilFEM material properties are time dependent. This dependence is controlled by utilizing a global variable called Calendar Time. This value is common to all materials and its value is fixed by user.
Additionally, every definition of a CivilFEM material contains the activation time which controls the time at which the materials start to exist. On the other hand, the deactivation time controls the time at which the materials finish to exist.
By default, all materials activation time is set to 0 days.
By default, all materials deactivation time is set to 36500 days.
The age of each material is calculated for any moment of time using the calendar time and activation instant values:
Material Age (Imat) = Calendar Time – Act. Time (Imat)
Imat:
material taken into account
This material age allows the calculation of any material property at any time simply by using an interpolation of the corresponding time dependent vectors.
