Specifies the ratio of the shear modulus to the modulus of elasticity in the axial direction of the fiberglass reinforced plastic pipe. For example, if the material modulus-of-elasticity (axial) is 3.2E6 psi, and the shear modulus is 8.0E5 psi, type 0.25 as the ratio of these two.
For new models, the default value is obtained from the configuration file.