Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Comparison of theoretical and experimental failure distributions for twisted yarns



Amy E. Engelbrecht-Wiggans, Amanda L. Forster


Both untwisted and twisted bundles of fibers and wires can be found in a myriad of applications, from ballistic body armor to suspension bridge cables. Predicting the bulk bundle failure distribution based on single fiber or wire tests is of interest as testing the overall structure can be expensive and logistically challenging. The distribution is key, as often bundles are used in applications where very high reliabilities (low failure probabilities) are desired. Thus, it is critical to be able to predict the strength for a given failure probability, and not just the mean value. Theoretical models of bundle failure have been a subject of interest since the 1940s, however to date there is no literature comparing the predicted failure distribution with experimental data. In this work, a comparison for a twisted bundle of continuous aramid fibers is presented.
Proceedings Title
Proceedings of the Society for Experimental Mechanics
Conference Dates
June 14-17, 2020
Conference Location
Orlando, FL, US
Conference Title
Society for Experimental Mechanics


Engelbrecht-Wiggans, A. and Forster, A. (2020), Comparison of theoretical and experimental failure distributions for twisted yarns, Proceedings of the Society for Experimental Mechanics, Orlando, FL, US (Accessed May 24, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created September 14, 2020, Updated March 20, 2023