The Use of a Gyratory Testing Machine in the Evaluation of Cold-Recycled Asphalt Paving Mixtures

2008 ◽  
pp. 74-74-21
Author(s):  
M Tia ◽  
LE Wood
Keyword(s):  
Testing Machine ◽  
Recycled Asphalt ◽  
Asphalt Paving

Assessment of Recycled Asphalt Paving Unit Cost Risk: A Case Analysis

2016 ◽  
Author(s):  
Matthew Stone ◽  
David A. Herndon ◽  
Ed Back ◽  
Serji Amirkhanian
Keyword(s):  
Unit Cost ◽  
Case Analysis ◽  
Recycled Asphalt ◽  
Asphalt Paving ◽  
Cost Risk

Testing Machine at Watertown Arsenal, Mass

1886 ◽  
Vol 22 (548supp) ◽  
pp. 8753-8754
Author(s):  
J. E. Howard
Keyword(s):  
Testing Machine

Parametric Study of Damping Characteristics of Magneto-Rheological Damper: Mathematical and Experimental Approach

2020 ◽  
Vol 15 (3) ◽  
pp. 37-48
Author(s):  
Zubair Rashid Wani ◽  
Manzoor Ahmad Tantray
Keyword(s):  
Structural Control ◽  
Research Work ◽  
Testing Machine ◽  
Input Voltage ◽  
Damping Coefficient ◽  
Control Technique ◽  
Damping Force ◽  
Active Devices ◽  
Active Structural Control ◽  
Magneto Rheological

The present research work is a part of a project was a semi-active structural control technique using magneto-rheological damper has to be performed. Magneto-rheological dampers are an innovative class of semi-active devices that mesh well with the demands and constraints of seismic applications; this includes having very low power requirements and adaptability. A small stroke magneto-rheological damper was mathematically simulated and experimentally tested. The damper was subjected to periodic excitations of different amplitudes and frequencies at varying voltage. The damper was mathematically modeled using parametric Modified Bouc-Wen model of magneto-rheological damper in MATLAB/SIMULINK and the parameters of the model were set as per the prototype available. The variation of mechanical properties of magneto-rheological damper like damping coefficient and damping force with a change in amplitude, frequency and voltage were experimentally verified on INSTRON 8800 testing machine. It was observed that damping force produced by the damper depended on the frequency as well, in addition to the input voltage and amplitude of the excitation. While the damping coefficient (c) is independent of the frequency of excitation it varies with the amplitude of excitation and input voltage. The variation of the damping coefficient with amplitude and input voltage is linear and quadratic respectively. More ever the mathematical model simulated in MATLAB was in agreement with the experimental results obtained.

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