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All posts by Chandan Kumar

How to Model the Compression of a Hyperelastic Foam

September 5, 2018

When characterizing hyperelastic materials, how do you ensure accuracy? Here, we show how to model the compression of a sphere made of an elastic foam using experimental data.

Modeling a Sphere Falling on a Water Surface

January 4, 2018

Get the theory behind a quintessential CFD problem, the oscillating motion of a buoyant sphere, as well as step-by-step instructions for modeling it in COMSOL Multiphysics®.

Modeling Microresonators with Electrostatic Actuation

October 8, 2015

Learn how to model electrostatically actuated MEMS resonators and get an intro to terms such as equilibrium point, pull-in, pull-in voltage, and time harmonic response of a biased resonator.

Fitting Measured Data to Different Hyperelastic Material Models

June 24, 2015

Want to fit your experimental data to different hyperelastic material models? You can with the Optimization interface in COMSOL Multiphysics®, which lets you fit a curve to multiple datasets.

Using the General Extrusion Coupling Operator in COMSOL: Dynamic Probe

January 28, 2014

Consider a laser heating example with a moving heat source (laser) and moving geometry. How can you use the General Extrusion coupling operator to probe a solution at a point in the geometry?

Structural Analysis with Thin Elastic Layers

April 3, 2013

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 […]

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