Buckling of webs from lateral compressive forces
Abstract
Lateral compressive buckling of a web is often evident in troughs along a tensioned span and in corrugations in a wound roll or in the web wrapping a roller. The lateral compressive forces are not evident from elementary free body diagrams, but arise from microscopic displacements caused by such phenomena as steering of edge tape elements by deflected rollers and an increasing width as the web passes over a driven roller or is expanded by heat, moisture, or viscoelastic memory. The theory that buckling of webs is caused by lateral compressive forces is supported by comparisons of wavelengths of troughs and corrugations to predictions by classical buckling theory. The theory of buckling of webs implies that, for inherent avoidance of harmful wrinkling, rollers should be stiff and as smooth as practical, tensions should be as constant as possible throughout the processing machine, and the web should be as dimensionally stable as possible.
Citation
Shelton, J. J. (1993, June). Buckling of webs from lateral compressive forces. Paper presented at the Second International Conference on Web Handling (IWEB), Stillwater, OK.