# MEboost

## Using the Combined Stress Tool

In bodies under plane stress, MEboost’s combined stress tool calculates various stresses that allow for comparison to a yield strength in uniaxial tension.  These stresses are used in conjunction with failure theories to determine suitability of a design. The tool calculates the following: Von Mises stress In-plane principal stresses Maximum shear stresses (in-plane and out …

## Using the MEboost Shaft Design Tool

MEboost’s shaft design tool allows for comprehensive analysis of shaft designs.  The shaft design tool allows for the following analysis: Static stress. Deflection and slope. Stress life fatigue analysis for infinite life. Static and fatigue stress concentrations. Critical speed calculation. For more general information on shaft design, see shaft design considerations. Shaft Design Tool Coordinate …

## Beam Diagrams in MEboost

Beam diagrams are an easy way to understand how loading of a beam translates into bending stress.  If you add a deflection diagram, there is even more information that is readily available.  MEboost has a tool that can create shear, moment and deflection diagrams. Assumptions and Load Types The tool requires that the beam is …

## Using Mohr’s Circle for Plane Strain

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 …

## System and Pump Curves

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 …

## Using the MEboost Tolerance Calculator

The MEboost tolerance calculator allows you to see the potential rejection rate given a probability distribution for a dimension.  This allows you to estimate rejection rate while balancing the necessary tolerance for functionality. A tolerance range is specified by a range of sigmas (standard deviation) around the nominal dimension, or you can directly specify the …

## Interpolating S-N Data

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 …

## Tolerance Analysis in Excel with MEboost

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 …

## Creating a Vibration Transmissibility Plot

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 – …