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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Results of tests on experimental plastic boards made from interwoven steel wire and cotton fabric.

Identifier  ExFiles\Box 142\2\  scan0497
Date  7th February 1944 guessed
  
Results of some tests of experimental plastic boards made from the interwoven steel wire and cotton fabric supplied.

Thickness 0.088" Thickness 0.120"
============

Three series of experiments were carried out with this material

Yielded an equal tensile strength in both longitudinal and transverse directions of about 24,000-lb./sq.in.

All steel wire - fabric impregnated with resin -
Tensile (lb./sq.in) 24,200. Bolt hole tensile (lb./sq.in) 21,900.

3 layers steel wire - cotton in centre
(lb./sq.in) 26,300. Bolt hole tensile (lb./sq.in) 21,400.

"E" (lb./sq.in) x 10-6. 1 layer steel wire and cotton in centre 2-40.
3 layers steel wire and cotton in centre 2-95.

Specific Gravity - all steel and cotton 2-53.
3 layers steel wire in centre - 2.33.
1 layer steel wire in centre - rest paper - 1.71.
2 layers ... ... - 1.98.

Your steel wire - cotton reinforcement imparts sufficient ductility to the board to enable it to resist impact and to prevent shattering and complete disruption of the sheet when tested by impact.

The fabric is so woven as to be self-interlocking.
  
  


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