Effective Thickness of Paper: Appraisal and Further Development.

Abstract

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)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA038927

Entities

People

  • Michael R. Rosenthal

Organizations

  • Forest Products Laboratory

Tags

Communities of Interest

  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Boundary Layer
  • Coefficients
  • Construction
  • Corrugating
  • Equations
  • Materials
  • Measurement
  • Mechanics
  • Micrometers
  • Modulus Of Elasticity
  • Moment Of Inertia
  • Paper
  • Physical Properties
  • Roughness
  • Stiffness
  • Surface Roughness
  • Thickness

Readers

  • Fluid Dynamics.
  • Forest Ecology
  • Structural Health Monitoring of Composite Structures.