Page 116 - Mechanics Analysis Composite Materials

Chapter 3. Mechanics of a unidirectional ply 101

0 0.2 0.4 0.6 0.8

Fig. 3.44. Dependence of normalized longitudinal strength on fiber volume fraction (0 - experimental
results).

Fig. 3.45. A mandrel for test rings.

Fig. 3.46. Two-, four-, and eight-sector test fixtures for composite rings.

not linear and f12 exceeds ai. This means that fibers do not restrict free shear
deformation of the matrix, and stress concentration in the vicinity of fibers does not
influence significantly material strength because of matrix plastic deformation.