The interlaminar shear strength (ILSS) of the composites with 0.5 wt.% CNTs increases by 12% compared to the neat CFRP composites, whereas the torsional shear modulus and strength determined using tubular specimens present corresponding improvements of 17% and 19.5%, respectively.
The torsional shear modulus is from 7.4 to 19.8 Kpa; phase angle is between 23° and 30° [ 60].
It was concluded that an increase in moisture content of stem leads to a decrease in the tensile strength, bending stress, Young's modulus, torsional stress, modulus of rigidity and to an increase in shear strength and shearing energy.
In this work, an energy-based method was used to derive the correlation between concrete shear modulus and torsional frequency of free slab based on first-order torsional mode shape of free slab.
Peak torque to failure (Tmax), angle of failure, gauge length (L), and polar moment of inertia (J) were used to calculate maximum torsional rigidity (TR), shear modulus (SM), and maximum torsional shear stress (SS).
Special attention has been paid to the measurement and modeling of tensile modulus, tensile strength, and torsional stiffness.
Films are cured and cooled between parallel plates in a dynamic torsional rheometer, which allows dynamic shear modulus and film thickness to be monitored simultaneously.
Presented herein are the methods and results of an experimental study on the response of such sections to torsional loading, including prediction of shear modulus (G) and angle of twist.
Using a torsional dynamic mechanical analyser, dynamic shear modulus and change in sample thickness was monitored simultaneously, thus giving information on both the physical properties (stiffness) and the progress of the reaction (shrinbdkage) in one experiment.
However, while a dose-dependent increasing trend in peak torque, torsional rigidity, shear stress, and shear modulus was noted in subsequent biomechanical testing, significance was not reached.
Data revealed trends toward dose-dependent increases in peak torque, torsional rigidity, shear stress, and shear modulus 4 weeks after rhBMP-2 treatment.
