Engineering Toolkit Vink SD&A for Mechanical Calculations
Spreadsheet Tolerance analysis
TolStackUp is a tolerance analysis spreadsheet (template) created in Microsoft Excel. It is designed to analyze and manage the effects of dimensional deviations of parts in an assembly.
Calculate Beam Deflection Pro
FlexBeam Pro is an easy-to-use beam deflection and buckling calculator. After entering the data, FlexBeam Pro performs all necessary calculations.
Calculate Beam Deflection Lite
Do you want to try FlexBeam first or do you not need the more extended functionality of FlexBeam Pro? Then download the free FlexBeam Lite version.
Calculate Hertz Contacts
With HertzWin you can quickly calculate point and line contacts. This handy, free program automatically performs all Hertzian contact calculations.
Calculate Flexure Hinges
Use the free FlexHinge program to quickly calculate the stiffness and material stress of a flexure hinge. It performs all calculations automatically.
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Recent Posts
Tolerance Analysis With TolStackUp of a Construction
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 dimensions...
Step-by-Step Example of 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...
Stresses, Tribology and Contact Mechanics
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...
Setting up the tolerance chain step-by-step
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 manufactured...
Tolerance Stack-Up Analysis and Process Capability Index Cpk
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...
Rolling Contact Fatigue
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...
Tangential Force Acting on a Hertzian Contact in HertzWin
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...
Refined, Advanced 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 distributions that can...
Background Information of the HertzWin Calculator for Hertzian Stresses
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 Hertzian...
Toolkit: Help function sometimes not visible and blurry fonts in Windows 10
Fix the issue with non-visible contents of the help function and fix the issue with blurry fonts under Windows 10.
The Distribution of Tolerances
A previous article discussed statistical tolerance stack-up analysis. It is usually more profitable to perform a statistical tolerance stack-up analysis instead of a worst-case analysis. A worst-case analysis often leads to low tolerance specifications and therefore...
Statistical Tolerance Stack-up Analysis
In the Worst-case Tolerance Stack-up Analysis article, you will read about worst-case or linear stack-up analysis. Such an analysis assumes that all dimensions in the tolerance chain have worst-case deviations from their nominal values. A statistical tolerance...
