Normal and Shear Coupling for Unidirectional Angle Ply

normal stresses applied

longitudinal stress

σ

1

5

transverse stress

σ

2

0

composite material properties

longitudinal stiffness (Young's modulus)

E

1

10

transverse stiffness (Young's modulus)

E

2

2

Poisson's ratio

ν

12

0.35

ply angle

θ

0

This Demonstration shows the coupling between normal stress and shear strain for a unidirectional, fiber-reinforced angle ply. By varying the applied stress, the material properties of the composite, and the ply angle

θ

, you can observe the degree of coupling between normal stress and shear strain for an angle ply. Note that for plies of 0 and 90 degrees, there is no coupling because they behave as orthotropic materials. The effect of varying the longitudinal and transverse stiffness, along with Poisson's ratio, can also be observed.