Mohr’s circle for plane strain can be used for determining principal strains in a body under plane strain. This article will cover the basics of Mohr’s circle in plane strain, and how it is easily created using MEboost. MEboost also handles bodies under plane stress. To learn about this scenario, refer to the article on …
MEboost has a pressure head conversion tool that converts pressure to head or head to pressure. We’ll cover the underlying theory of pressure head conversion and how this conversion is easily done in MEboost. Conversion Equation Head is the fluid height equivalent to pressure. In other words, head is the height of a fluid column …
The system curve tool in MEboost can generate a fluid system curve approximation as well as up to four pump curves on the same chart. You can also generate a combined pump curve where pumps are either in parallel or series. In this article, we’ll show how calculations are made and how to generate the …
The MEboost tolerance calculator allows you to set a dimension’s tolerance limits based on a standard deviation range. This allows you to estimate rejection rate while balancing the necessary tolerance for functionality. Prior to using the tool you need to have an understanding of the manufacturing process used to create the part. In order to …
When doing stress life fatigue analysis of spectral loading, interpolating S-N data becomes necessary. MEboost has three methods to do this, depending on the data available. Background on Cumulative Fatigue Damage Before proceeding, let’s briefly explain why we need to interpolate. With spectral loading, the stress cycles are varying with time. The first step is …
Performance and cost trade-offs are a constant in engineering design. Optimizing a design to balance these competing forces can be challenging to quantify and we often have to resort to experience or intuition. One of the traditional cost drivers is specifying tolerances. Part dimensions are naturally random variables since each part manufactured will not be …
MEboost allows for easy analysis of a tolerance stack. In this article we’ll show how to perform worst case, root sum squared (RSS), and Monte Carlo tolerance analysis in Excel using MEboost. If you want more background information on the three methods, check out the tolerance analysis article. PART I Basic Concepts Before we start …
Affinity laws are used to relate the performance of a pump or fan from a known operating condition to a new, unknown condition. The affinity laws can be calculated at a single point or charts of flow rate, head, and power can be plotted against changes in impeller speed or diameter. Changes to a pump’s …
The Bernoulli equation is a useful way of approximating the state at a point in a streamline given the state at another point. Sometimes we have a situation where it’s easy to measure or observe the state of a point in a fluid system, but we want to know the state of the system at …
A vibration transmissibility plot is a useful way of seeing the response of a harmonic oscillator. In this article we’ll go over the basics of undamped and damped vibration as well as understanding what a vibration transmissibility plot means. In the context of this article, we will be considering spring – mass and spring – …