All posts by Henrik Sönnerlind
![](http://cdn.comsol.com/wordpress/2015/02/Compression-to-tension-uniaxial-response1.png)
Obtaining Material Data for Structural Mechanics from Measurements
Linear elastic, hyperelastic, nonlinear elastic, plasticity, creep, concrete: COMSOL Multiphysics® contains a number of built-in material models for structural analyses. Get an intro >>
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Buckling, When Structures Suddenly Collapse
The easiest way to approach a buckling problem — like a bridge collapse or crushed soda can — is by performing a linearized buckling analysis. See how to do so in COMSOL Multiphysics® here >>
![](http://cdn.comsol.com/wordpress/2013/11/Cauchy-and-2nd-Piola-Kirchhoff-stress.png)
Why All These Stresses and Strains?
In structural mechanics you will come across a plethora of stress and strain definitions. It may be a Second Piola-Kirchhoff Stress or a Logarithmic Strain. In this blog post we will investigate these quantities, discuss why there is a need for so many variations of stresses and strains, and illuminate the consequences for you as a finite element analyst. The defining tensor expressions and transformations can be found in many textbooks, as well as through some web links at the […]