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How to access a variable value of a domain, not a point at a particular time in COMSOL during simulation
Posted 21 ott 2020, 20:51 GMT-4 Structural Mechanics Version 5.4 0 Replies
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I have built a comsol model to simulate the thermal expansion, but when I want to introduce the external stress under the Linear Elastic Material, and it works well with a self-defined stress. However, I need the stress of a domain (domain 3) at certain time during simulation as the external stress (here in the model is stress1), I do not know how to do it.
Let me make it clear: For example, I need my model to get the value of solid.sz (Stress tensor, z component) of the domain 3, which is calculated by Surface Average of the domain, not a point, in Derived Values, at time t=999s, 1999s.... and define an external stress as a function of solid.sz(t=999s/1999s) and then use this function as the external stress for simulation. I tried the stress1=solid.sz(999)-solid.sz(999)*0.9 from 1000s to 2000s and it did not work.
Can you guys help me with this?, I would appreciate it if an example of such an external stress function of solid.sz of the domain 3(not just a point) is given at t=999s and a point value maybe also useful for me .
Hello Kevin Wei
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