This investigation confirmed that the specimen with high porosity and compressibility had low noise propensity.
Similar drop in compressive strength of 60% was observed with LMM specimen with high CNTs content of 1.5%.
For the specimen with high confining pressure (100 kPa), stress softening was observed at the end of the test.
Specimen with higher WM volumetric ratio corresponds to a lower ultimate axial strain but larger strength.
Higher compressive strength was obtained for a specimen with higher fiber dosage (6 kg/m3), whereas the lowest value was obtained in control specimen.
The effect of temperature exposure is shown in Fig. 12a for specimen with no fibers and in Fig. 12b for specimen with high fiber dosage of 6 kg/m3.
During the undrained loading, the specimen with higher compressibility tended to generate a larger pore-water pressure and exhibit a smaller shear strength.
Test results of six PET FRP jacketed specimens are presented and compared with those of a specimen with high strength aramid FRP (HS AFRP) and two reference specimens.
It is obvious that the dominant wear damage mechanism in the specimen with high surface hardness and with high experimental rotation speed is ratcheting rather than an adhesive wear mechanism.
The specimen with high content of epoxy resin is more likely to be the convex curve while the low content ones fit the concave curve.
