Von Mises Stress

Written by Adam Blau
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In many design systems, it is necessary for the engineer to conduct tests evaluating the fatigue elements of the components. If a part proves to be too weak to support its load, the entire design system can break down. Such a debacle could lead to extreme loss of profit, credibility or--in a worst case scenario--lives.

One test that is frequently used by engineers is the Von Mises stress analysis. This tests the fatigue and stress capabilities of a complex and contorted piece of material. The test uses principles similar to those used in a simple uniaxial tension test and relates them to the more complicated shape filled with the bends and twists of real-world material.

The Von Mises stress analysis utilizes a tremendous amount of involved calculus. While the analysis is extremely complicated, it can save a company scads of money in the long run, since it allows it to ensure the stability and strength of a final product. The Von Mises stress analysis is one of many stress tests performed on critical components.

Von Mises and CAD

Some sophisticated computer-aided design (CAD) programs are beginning to incorporate Von Mises analyses directly into their programming code. In this way, an engineer can perform this crucial analysis on theoretical components as they are being built. Because of the strong CPU power on computers today, this sophisticated analysis can be performed on the fly, while the engineer is constructing the component design.


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