Approximate Expressions for the Elastic Constants of Cord-Rubber Laminates
The relatively simple equations given herein for the four independent elastic constants of a single ply of cord and rubber and for the three independent elastic constants of a cord-rubber angle-ply laminate can be used to assess with sufficient accuracy for many purposes the effect of changes in constituent material properties and/or ply geometry on the stiffness characteristics of unidirectional, filamentary composites used in pneumatic tires.
Rubber Chemistry and Technology
Walter, Joseph D. and Patel, H. P., "Approximate Expressions for the Elastic Constants of Cord-Rubber Laminates" (1979). Mechanical Engineering Faculty Research. 848.