Effective Thickness of Paper: Appraisal and Further Development.
Forest Service research paper,
FOREST PRODUCTS LAB MADISON WIS
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The rough surface and heterogeneous internal structure of paper complicate and restrict an analysis of paper by classical engineering mechanics. Problems in establishing physical properties stem from an uncertainty of exactly what is the thickness of a rough surfaced material. The concept of effective thickness obtained from a simultaneous solution of equations for flexural and extensional stiffness is proposed to mathematically transform the rough surfaced fibrous paper structure into a mechanistically equivalent, smooth homogeneous sheet. The effects of density gradients within the sheet on effective thickness are examined. The U.S. Forest Products Laboratory FPL modified dial micrometer is shown to yield an expedient laboratory approximation to the effective thickness. Author
- Wood, Paper and Related Forestry Products