Tips & Tricks | Posted on
April 3rd, 2013 by
Some structural applications involve thin or high aspect ratio structures sandwiched between other relatively low aspect ratio structures. For example, if a piezoelectric transducer is glued on the surface of a mechanical system, the thickness of the adhesive layer is very small in comparison to the two structures it glues together. Numerical modeling of such a thin layer in two or three dimensions requires resolving it with an appropriate finite element mesh. This can result in a large concentration of finite elements near the adhesive layer, leading to high computational cost and time. To avoid this issue, one common assumption many numerical simulations make is to assume perfect bonding between the two structures. By making this assumption, the numerical model ignores the effect of the flexibility of the adhesive layer. This will lead to inaccurate results because the adhesive layer is not infinitely stiff. In this blog post, we will show how to model such thin layers using COMSOL Multiphysics — without the need to draw the layer’s thickness explicitly, while still accounting for the effect of the thin elastic layer. This can lead to a more efficient structural analysis with significant reduction in computational cost and time, without sacrificing the accuracy of the simulation.
Read more on: Structural Analysis with Thin Elastic Layers