Page 119 - Mechanics Analysis Composite Materials

104 Mechanics and analysis of composite materials

Fig. 3.52. Test fixture for transverse tension and compression of unidirectional strips.

I a

Fig. 3.53. Test fixture for transverse tension or compression of unidirectional tubular specimens.

by micromechanical analysis because of a rather complicated interaction of these
modes. Nevertheless, useful qualitative results allowing us to understand material
behavior and, hence, to improve its properties, can be obtained with microstructural
models.
Consider typical compression failure modes. Traditional failure mode under
compression is associated with shear in some oblique plane as in Fig. 3.56. Shear
stress can be calculated using Eq. (2.9), i.e.,

T = bl sin a cos a