英语翻译AM-Frequency Sweep TestThe Bohlin’s Dynamic Shear Rheome

英语翻译
AM-Frequency Sweep Test
The Bohlin’s Dynamic Shear Rheometer (DSR) was used to determine the complex
shear modulus (G*) of AM at high and intermediate temperatures.The frequency
sweep test was conducted at frequency levels of 1 Hz through 60 Hz at log-increments
at temperatures of 15,20,25,34,46,58 and 64oC.The test was conducted under the
controlled stress mode.The applied shear stress at each temperature was selected such
that it was within the linear visco-elastic range.The specimen was conditioned by
applying 100 cycles at 10 Hz at one-half the stress level that was used in the test.
AM-Fatigue Test
The test was conducted under stress controlled mode,and a single frequency of
loading of 1.58 Hz was applied at 25oC.Shear stress level of 14,000 Pa was applied on
the AM.The test was terminated at load repetitions of 10,000 cycles.The preconditioning
of the AM was done by applying 200 cycles of loading at a frequency of
10 Hz before conducting the actual fatigue test.The G* was plotted as a function of the
number of load repetitions to identify the fatigue failure in the mixture.