by Jaap Vink | 7 May 2024 | Blog, Tolerance Analysis

The article ‘Setting up the tolerance chain step-by-step’, described how to set up a tolerance chain step-by-step using an example. The article ended with a sketch of the tolerance chain. You can see this chain in the figure below. By processing the part... by Jaap Vink | 12 Nov 2023 | Blog, Tolerance Analysis

A previous article described the entire step-by-step plan for building a tolerance chain. It was described using a relatively simple example. In practice, however, designs can be much more complex. And then the tolerance analysis of such a design is much more... by Jaap Vink | 1 Nov 2023 | Blog, Hertzian Contact

When two objects come into contact, depending on the shape of the surfaces, there may be point or line contact. The contact force causes deformation and thus stresses in the material. If these material stresses are high, the material may fail. The material stresses in... by Jaap Vink | 2 Mar 2023 | Blog, Tolerance Analysis

The article ‘Step Plan Tolerance Analysis’, briefly summarizes the steps to achieving a good tolerance analysis. The following articles discuss the method of adding tolerances. Much attention has been paid to the Statistics of Dimensional Variations of... by Jaap Vink | 14 Sep 2022 | Blog, Tolerance Analysis

Previous articles have discussed the use of statistics in tolerance analysis: how statistical summation works, how to account for the influence of different distributions, and how to combine worst-case with statistical contributions. The resulting picture is that the... by Jaap Vink | 22 Apr 2021 | Blog, Hertzian Contact

Up to and including HertzWin 3.2.0, all calculated results are for a static situation. The most important material stresses for a static situation are the maximum shear stress and the von Mises equivalent stress. The Von Mises equivalent stress is most often used to...
by Jaap Vink | 6 Dec 2020 | Blog, Hertzian Contact

With the program HertzWin you can calculate Hertz point and line contacts. The influence of a tangential force can also be calculated. HertzWin is available online for free since March 2009. No approximation but the exact solution In older releases of HertzWin (before... by Jaap Vink | 21 Apr 2020 | Blog, Tolerance Analysis

In previous articles about tolerance analysis, I discussed the step-by-step plan and how to add up tolerances. The sum of tolerances can be a worst-case sum or a statistical sum. In ‘The Distribution of Tolerances’ I also discussed the types of... by Jaap Vink | 28 Jan 2019 | Blog

Occasionally, contact stresses play a role in a mechanical design. Hertzian stress equations are needed to calculate indentation and to check that the yield stress isn’t exceeded. Since programming is a hobby of mine, it seemed like a good idea to make a...