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Stress-strain analysis of a Conical spring on Comsol
Posted Feb 20, 2023, 11:01 a.m. EST 2 Replies
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I am working on a conical spring using Solid Mechanics module in Comsol multiphyisics. Conical springs are caraterized for linear F vs D curve until it reaches the transition point. After the transition point the behaviour becomes non-linear. I have managed to setup parameteric equations for my study; I am doing a stationary study to investigate the non-linear behaviour of Force-axial deformation curve of a conical spring. I have a conical spring sandwitched between two flat plates. One of the plate is fixed and a force of the given magnitude is exterted on the other plate. I am using auxiliary sweep to add several force magnitudes in my study. The problem is that the Force displacement curve remains linear. I wonder what could be the reason? Here are some figures
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Interesting question that might be answerable if you post a (reduced) model.
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Nine times out of ten, an unexpected linearity is caused by not having the Include geometric nonlinearity check box selected in the study.
-------------------Henrik Sönnerlind
COMSOL