Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

more free publications
 
Choose a Boundary Condition and Calculate!
Cantilever Beam
Cantilevers
Mixed Support Beam
Mixed (Fixed-Simple)
Simply Supported Beam
Simply Supported
Force Equilibrium
The equilibrium equations describe how the beam carries external pressure loads with its internal stresses. Rather than deal with these stresses themselves, we choose to work with the resultants since they are functions of x only (and not of y).

To enforce equilibrium, consider the balance of forces and moments acting on a small section of beam,

Equilbrium in the y-direction gives the equation for the shear resultant V,

Moment equilibrium about a point on the right side of the beam gives the equation for the moment resultant M,

Note that the pressure load p does not contribute to the moment equilibrium equation.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.