It was expected that the axial compression modulus
of PBO fiber in the composite was also enhanced and the maximum increase was 21.0% (at indentation depth of 250nm) when the radiation dose was 60 kGy.
With the combination of the equilibrium compression modulus
is as follows: E = y[GAMMA].
The global bending modulus of elasticity ([E.sub.0,mean,test]) and compression modulus
of elasticity parallel to the grain ([E.sub.c,0,test]) were determined in previous tests (Table 4).
Here, [phi] denotes the porosity, [[phi].sub.0] is the initial porosity, [[epsilon].sub.v] the volumetric strain of the coal and rock masses, p (in Pa) is the pressure of the fluid, [p.sub.0] (in Pa) is initial pressure of the fluid, and [K.sub.S] represents the volumetric compression modulus
of the coal and rock masses.
Moreover, the compression modulus
also shows an increase of 11%, with the incorporation of CNTs (Table 2).
To quantify the phase transition process of the monolayers, we introduced the parameter of compression modulus
In Gurtler's research , the "in-plane" compression and shear experiments on FRP decks were conducted (Figure 3) to get the nominal compression modulus
and nominal shear modulus of the whole FRP deck panel, which were used to develop the design methods for the FRP-steel composite girder system.
where [[nabla].sup.s]u = 1/2 ([nabla]u + [nabla][u.sup.1]) is the strain tensor with [nabla][u.sup.t] denoting the transpose of the matrix [nabla]u; [rho] is the density of the medium; the complex quantity [mu] + i[omega][eta] is the shear modulus, with [mu] indicating the storage modulus and [eta] indicating the loss modulus reflecting the attenuation of a viscoelastic medium; [lambda] and [[eta].sub.[lambda]] are the compression modulus
and compression viscosity, respectively.
Simulated and experimental results were found to be very close to each other in respect of compression modulus
of PLA material as illustrated in Fig: 9.
Compressive strain was higher than the tensile strain and further showed the difference between tension and compression elastic modulus, as the tension modulus of PSB was more than the compression modulus
. The change of the ultimate strain range was wide, also showing the large variability in performances of PSB.
The small strain compression modulus
is the same as the small strain tensile modulus only for very small strains.