Injection Molding Design Guide

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

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

more free publications
 

The sign convention used in the plate section is defined in this section. Notice that unlike some publications on this subject, the loading term p(x, y) points to the same direction as the z-axis. Please refer to the classical plate theory for more details.

Loading and deflection sign convention

The loading P and deflection w in the z direction indicated are positive

For the sign of moment resultants, a moment caused by a positive stress with a positive arm is considered positive and the subscript of the stress is used to denote this moment.

bending moment sign convention

Therefore, positive Mx points toward the y direction under the right-hand rule.

 

bending moment sign convention

Positive directions for bending moments.

 

shear force sign convention

Positive directions for shear forces.
Glossary
Injection Molding Design Guide

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

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!