INFLUENCE OF VOIDS ON THE ENGINEERING CONSTANTS OF PAPER .1. CONTINUUM MODELING

The influence of voids on the engineering elastic constants of paper i s investigated in two parts. Part 1 describes a continuum micromechani cal model that generates in-plane elastic constants and moisture-expan sion coefficients of void-free papers composed of chemical pulp fibers . Predictions from the model are compared with existing experimental d ata from the literature. The modeling of voids, correction of baseline properties for voids, and further experimental comparisons are report ed in the second part of the study.