Page 117 - Mechanics Analysis Composite Materials

I02 Mechanics and analysis of composite materials

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Fig. 3.47. A composite ring on a eight-sector test fixture.

Fig. 3.48. Failure modes of unidirectional rings.

c +
*
c -
c +
c -
c d
c2
O2c -
*
c -
t
f
c *
Fig. 3.49. Modes of failure under transverse tension: 1 - adhesion failure; 2 - cohesion failure; 3 - fiber
failure.
Strength and stiffness under in-plane shear are determined experimentally by
testing plates and thin-walled cylinders. A plate is reinforced at 45" to the loading
direction and is fixed in a square frame consisting of four hinged members as in
Fig. 3.54. Simple equilibrium consideration and geometric analysis with the aid of
Eq. (2.27) yield the following equations