amplitude

[entropico]

Good evening,

Can anyone explain to me what "amplitude" is?
I can't understand. . amplitude of what?
Suppose I wanted to make a simulation that lasts 4000 s and this fits into step, in time period along with increments.
What do I put in amptude?
I also do not understand another thing; I'm doing simulations that concern a superplastic material.
I obtained experimentally that the test breaks after about 3200 s at a pressure of 3 bar and at a temperature of 500°c.
from experimental tests I calculated the constants of my model that I put in abaqus, in particular c,m, a and n.
the problem is that when I launch the simulation it ends after 2200 s, giving me an error message concerning increments, so there are 1000 s of difference!
depends on the amplitude?

 

[Davide.]

if I didn't understand what you ask, for amptude you mean the numerical value of the variable (force, move etc) to the corresponding time period (which will be a fraction of the time step).
the unit of measurement must be consistent with those of the values of the other parameters already inserted (there is a table in the tutorial).
the fact that the simulation does not converge up to 3200s can be due to the fact that, in this last phase, the test deforms excessively and therefore the criterion chosen for the simulation may not be adequate.

 

[Neway]

Good morning.
I have a similar problem. I'm running a thermal analysis on a concrete beam. I have already defined geometries and boundary conditions; if I want to subject the element to the standard fire curve (iso834) on a face like I can insert it?
for now I have created a step further than the initial step by default for the heating phase and I tried to insert in it between the boundary conditions one in which, in a tabular way, I insert as amplitudes the time and temperature of the corresponding iso. What do I have to insert in the "magnitude" field?
do you think the procedure is correct?
I launched the analysis but I can't view the temperature range at various time intervals.

Thank you.