PSTRESS Pulley Design Software

PSTRESS is a proprietary pulley design software program developed at CDI. The first version was created in 1984. This first version used a closed-form analytical method to solve for the stresses in a pulley. The program was based on the work of H. Lange (1963) and W. Schmoltzi (1974). In 1993 CDI expanded the number of shapes PSTRESS could model by adding a relatively small number of finite elements to the pulley simulation. This allowed us to preserve the speed of the close-form analytical analysis, while adding the ability to model complex geometries. Xiangjun Qiu and Vinit Sethi published CDI’s new simulation method (and comparisons between our method and full ANSYS simulations) in a paper titled A New Pulley Stress Analysis Method Based on Modified Transfer Matrix. This paper appeared in Bulk Solids Handling volume 13, issue 4.

PSTRESS is a powerful pulley design software tool that allows engineers to quickly predict the triaxial stress field in a pulley. Unlike a general purpose FEA program, different engineers using PSTRESS will always get the same answer when simulating the same pulley geometry with the same applied loads. Meshing and boundary conditions are predetermined and most of the solution is analytical so computation times are typically less than one second. This allows designers to rapidly review the effect of a design change on the stress distribution in the pulley and quickly converge on an optimum pulley design.

PSTRESS Software - Pulley Input Screen
PSTRESS Software – Pulley Input Screen
PSTRESS Software - Full Results Screen
PSTRESS Software – Full Results Screen
PSTRESS Software - Goodman Diagram Screen
PSTRESS Software – Goodman Diagram Screen
 Sample Report of PSTRESS Results (MS Word RTF)

PSTRESS v3.5 Installation Software

A valid security dongle is required to operate this software. See below for pricing and order form.

Current Version: PSTRESS v3.5 Installation Software (posted 05/12/16 – 9.1 mb)


PSTRESS User Manual

It is highly recommended that you download a copy of the PSTRESS user manual.  This file is in Adobe Acrobat Reader format.

Current Version: Acrobat (.pdf) User Manual v3.5 (posted 10/08/14 – 912 kb)
Previous Version: Acrobat (.pdf) User Manual v3.2.3 (posted 03/24/14 – 923 kb)


PSTRESS  Pricing

Unit Price Upgrade Price
Single Site Licenses $3,995.00 $1,997.50
Additional Site Licenses $2,995.00 $1,497.50
Additional Site Licenses (5 or more) $2,795.00 $1,397.50
Network Version Site License $5,995.00 $2,495.00
The order form is available in Microsoft Word and Adobe Acrobat format. Microsoft Word Adobe Acrobat


PStress Pulley Design Software was last modified: May 12th, 2016 by CDI