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Joule heating and thermal expansion

Posted 2015年10月15日 GMT-4 06:31 Electromagnetic Heating, Structural Mechanics 1 Reply

Anastasiia Tukmakova
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Met several issues while modeling the spark plasma sintering process using "Joule heating and thermal expansion"
1. Material has a significant deformation (20 mm) on the Von Mises stress 3D plot. But on line graph the value of deformation is normal (0.3 mm). Maybe we interpret stress graph incorrectly? Does this graph include deformation?
2. There is deformation value while the pressure applied but deformation is constant. We have 0% of deformation in case of 0 Pa applied, but any other pressure value leads to constant deformation value of 20 mm in z-axis direction (in case of several Pa or several MPa). So, it looks like deformation on 3D graph is not sensitive to pressure change. Also, as it was in 1., deformation is normal on line graph and there is a change as it is expected.
What can be a reason of such mismatch between 1D and 3D plots?
thanks
1 Reply Last Post 2015年12月4日 GMT-5 17:01
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Hello Anastasiia Tukmakova

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Jeff Hiller COMSOL Employee

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Posted: 9 years ago 2015年12月4日 GMT-5 17:01
The deformations in your plots are scaled so you can see those deformations (In most mechanical analyses the deformations are quite small and would not be visible without such a scaling). You can adjust that scaling by going to the Deformation subnode of your plot and changing the scaling factor to 1 (or whatever number you find suitable).
Best,
Jeff
The deformations in your plots are scaled so you can see those deformations (In most mechanical analyses the deformations are quite small and would not be visible without such a scaling). You can adjust that scaling by going to the Deformation subnode of your plot and changing the scaling factor to 1 (or whatever number you find suitable). Best, Jeff

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