Compressive Strength of Rigid-Rod Polymer Fibers
Abstract
Various mechanical models describing the buckling of a single column and a bundle of columns were reviewed. The relationship between these models and the buckling of a polymeric fiber with substructures (fibril, microfibril, and individual chain) were discussed. It was found that the structural element that has the lowest critical buckling strength will initiate the compressive failure of the fiber. The critical strength is dependent on the element geometry and the strength of the interaction with the neighbors. In previous analysis in the literature, the equations were applied to the molecular chain level. This study shows that the analysis is more appropriate at the fibril level. This can account for the failure of many attempts in improving the compressive strength by modifying the molecular structure. The fiber torsion test was reassessed and some preliminary cold draw experiments were reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1990
- Accession Number
- ADA221886
Entities
People
- Charles Y. Lee
- U. Santhosh
Organizations
- Wright Laboratory