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Cannot get temperature dependent coefficient of thermal expansion (CTE) to work. Please help
Posted Oct 11, 2014, 11:34 p.m. EDT Heat Transfer & Phase Change Version 4.4 1 Reply
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I'm having an issue simulating time dependent CTEs. This is a classic problem. There's a thin film on top of a bulk substrate, each having different CTEs. The difference in CTEs should induce a stress when undergoing a temperature difference. I went under material properties and changed my CTE to 2e-6*T for the top film and 1e-6 for the bottom film (so the top film is temperature dependent and the bottom is constant). When I compute I get a result but it's not what I expecting. I'm not sure if I'm simulating the experiment incorrectly or if my hand calculations are wrong. Any ideas?
I want to simulate the structure going from 100 K to 0 K.
I'm new to COMSOL so I'm not sure if my thinking was right but I set the initial value to 100 K and I set all the boundaries to 0 K so for a stationary study I think the final resulting stress is when the structure comes to the final temperature of 0 K.
I'm attaching the file. Thank you.
I want to simulate the structure going from 100 K to 0 K.
I'm new to COMSOL so I'm not sure if my thinking was right but I set the initial value to 100 K and I set all the boundaries to 0 K so for a stationary study I think the final resulting stress is when the structure comes to the final temperature of 0 K.
I'm attaching the file. Thank you.
1 Reply Last Post Oct 11, 2014, 11:35 p.m. EDT
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Posted:
10 years ago
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