| 1. |
On the basis of existing expressions for the strength of fiber compositions having a monodirectional structure, expressions for the specific strength of these materials were obtained; on the strength of these expressions, diagrams were constructed showing the dependence of the specific strength of compositions on two parameters: the volumetric proportion Vf of the fibers and the transmission coefficient K.
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| 2. |
For the case where the fiber-material density  f is less than the matrix density m, there are four possible characteristic types of diagrams; for the case where f > m, there are ten diagrams; where f = m, there are four, of similar appearance to those of strength diagrams.
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| 3. |
For the detailed description of the diagrams, the characteristic-section method was used, enabling each diagram to be presented by its corresponding collection of characteristic diagrams, which express the dependence of the specific strength of compositions on the value of Vf, for various constant values of the transmission coefficient K.
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Institute of Metallurgy, Academy of Sciences of the USSR. Translated from Problemy Prochnosti, No. 7, pp. 59–63, July, 1970.