Development of fatigue performance specification and its relation to mechanistic-empirical pavement design using four-point bending beam test results

2012 ◽  
pp. 59-71 ◽  
Author(s):  
B Tsai ◽  
R Wu ◽  
J Harvey ◽  
C Monismith
Keyword(s):  
Pavement Design ◽  
Fatigue Performance ◽  
Test Results ◽  
Beam Test ◽  
Performance Specification ◽  
Four Point Bending

scholarly journals Evaluation of the effect of deflection waveform on fatigue performance of asphalt mixture in the four point bending beam test

2019 ◽  
Vol 46 (3) ◽  
pp. 207-215
Author(s):  
Mariana Gaertner Pintarelli ◽  
João Victor Staub de Melo
Keyword(s):  
Asphalt Mixture ◽  
Neutral Position ◽  
Strain Response ◽  
Test Results ◽  
Beam Test ◽  
Force Output ◽  
Asphalt Mixes ◽  
Four Point Bending ◽  
Test Conditions ◽  
Sinusoidal Waveform

An experimental study was conducted to determine the effect of deflection waveform on four-point flexural fatigue test results for hot mix asphalt. This paper reports how the waveform affects the fatigue resistance of an asphalt mixture and, consequently, the fatigue models of the material. The mix was tested at different strain levels under both haversine and sinusoidal deflection-controlled modes. The findings indicate that haversine displacement control testing results in a sinusoidal strain response of half the intended amplitude. This outcome was attributed to the viscoelastic nature of asphalt mixes. In the deflection controlled haversine test, permanent deformations lead to a new equilibrium neutral position of the beam and the force output follows a sinusoidal waveform. This produces erroneous fatigue results since the test assumptions do not match the actual test conditions. It is recommended to use a sinusoidal waveform to obtain consistent results.

scholarly journals Design and Beam Test Results for the 2-D Projective sPHENIX Electromagnetic Calorimeter Prototype

2021 ◽  
Vol 68 (2) ◽  
pp. 173-181
Author(s):  
C. A. Aidala ◽  
S. Altaf ◽  
R. Belmont ◽  
S. Boose ◽  
D. Cacace ◽  
...  
Keyword(s):  
Electromagnetic Calorimeter ◽  
Test Results ◽  
Beam Test

Experimental and Numerical Investigation of Critical Buckle Load of Composite Specimens

2015 ◽  
Vol 732 ◽  
pp. 85-90
Author(s):  
Lukáš Bek ◽  
Radek Kottner ◽  
Jan Krystek ◽  
Tomáš Kroupa
Keyword(s):  
Static Analysis ◽  
Glass Fibre ◽  
Large Deformations ◽  
Bending Test ◽  
Test Results ◽  
Beam Test ◽  
Three Point Bending ◽  
Box Beams ◽  
Buckle Beam ◽  
Thin Walled

Different carbon and glass fibre strips were subjected to the double clamp buckle beam test. Furthermore, thin-walled glass fibre box-beams were subjected to the three-point bending test. Results of experiments were compared to different numerical simulations using buckling analysis or static analysis considering large deformations.

scholarly journals Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

2018 ◽  
Vol 8 (9) ◽  
pp. 1495 ◽  
Author(s):  
Jiangmiao Yu ◽  
Xianshu Yu ◽  
Zheming Gao ◽  
Feng Guo ◽  
Duanyi Wang ◽  
...  
Keyword(s):  
Fatigue Test ◽  
Fatigue Resistance ◽  
Crumb Rubber ◽  
Waste Recycling ◽  
Fatigue Performance ◽  
Four Point Bending ◽  
Asphalt Rubber ◽  
Shear Fatigue ◽  
Tensile Fatigue ◽  
Indirect Tensile

Warm asphalt rubber (WAR) mixture is a sustainable paving material with advantages including waste recycling and noise reducing. A comprehensive understanding of the fatigue performance of WAR specimens is helpful to its wide application. However, research on evaluating the fatigue performance of WAR binder and mixtures is very limited. This paper applies five fatigue analysis approaches to evaluate the fatigue life of WAR samples with three different warm mix asphalt (WMA) additives. The conventional G*sinδ, linear amplitude sweep (LAS), indirect tensile fatigue test (ITFT), and four-point bending beam (4PB) test were conducted based on available standards. In addition, a novel shear fatigue test was performed on WAR mortars. Test results indicated that the incorporation of crumb rubber has a significantly positive effect on fatigue resistance. WAR with chemical and foaming additives exhibited a poorer performance than asphalt rubber (AR), but their fatigue performance was still greatly superior to the non-rubberized samples. Finally, LAS as well as mortar shear fatigue and 4PB tests provided the same prediction of fatigue resistance, while the results of G*sinδ and the ITFT were inconsistent. It is recommended to use LAS, the mortar shear fatigue test, and the 4PB test for the fatigue resistance evaluation of rubberized specimens. The validation of the findings with more materials and field performances is recommended.

scholarly journals Beam test results from a prototype for the delphi microvertex detector

1990 ◽  
Vol 292 (1) ◽  
pp. 75-80 ◽  
Author(s):  
V. Chabaud ◽  
H. Dijkstra ◽  
M. Gröne ◽  
M. Flohr ◽  
R. Horisberger ◽  
...  
Keyword(s):  
Test Results ◽  
Beam Test

scholarly journals Beam Test Results of Thin n-in-p 3D and Planar Pixel Sensors for the High Luminosity LHC Tracker Upgrade at CMS

2018 ◽  
Author(s):  
Irene Zoi ◽  
M. Boscardin ◽  
G.F. Dalla Betta ◽  
M. Dinardo ◽  
G. Giacomini ◽  
...  
Keyword(s):  
Test Results ◽  
Beam Test ◽  
High Luminosity ◽  
Pixel Sensors

A STUDY ON THE INTRINSIC TIME RESOLUTION OF THE MRPC USED IN THE STAR-TOF

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2476-2483 ◽  
Author(s):  
◽  
MING SHAO ◽  
LIANG LI
Keyword(s):  
Time Resolution ◽  
Incident Angle ◽  
Signal Amplitude ◽  
Test Results ◽  
Beam Test ◽  
Intrinsic Time ◽  
200 Gev ◽  
Star Experiment ◽  
Calibration Study ◽  
Using Data

Time-Of-Flight (TOF) based on Multi-gap Resistive Plate Chamber (MRPC) detectors have been successfully operating at the STAR experiment since 2003.2,3 The MRPC time resolution is however found to be significantly worse2 (80-90 ps) than that previously obtained in beam test (60 ps).4 In order to fully understand MRPC working principles and operating requirements, an extensive calibration study is performed using data collected by STAR in 200 GeV Au + Au collisions in 2004. The relation between MRPC timing, signal amplitude, incident angle and momentum are discussed. Contributions from tracking properties of STAR-TPC are also studied by simulation. The intrinsic time resolution of the MRPCs used in STAR-TOF, after taking all factors into consideration, is found to be in good agreement with beam test results.

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