Influence of Chemical Stabilization on the Flexural Fatigue Performance of Subgrade Soil

Based on the fatigue test for flexural performance of five reinforced concrete beams, the variation characteristics of the crack development, concrete strain, steel strain, fiber strain with the cycle number of the fatigue load were analyzed, and the effect of hybrid fiber sheets and basalt fiber reinforced polymer(BFRP)sheets on flexural fatigue performance of the strengthened beam was studied. The results show that the accumulated damage of RC beams strengthened with hybrid fiber sheets was slowed down significantly, the anti-crack property was much improved, and the fatigue life was greatly prolonged. Compared with the ordinary RC beam and the RC beam strengthened with double BFRP sheets, the fatigue life of RC beams strengthened with hybrid CFRP/BFRP(C/BFRP) sheets and hybrid CFRP/GFRP(C/GFRP) sheets was increased by 291.26%, 298.63% and 10.73%, 13.53%.

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Flexural fatigue performance of concrete containing nano-particles for pavement

International Journal of Fatigue ◽

10.1016/j.ijfatigue.2006.10.004 ◽

2007 ◽

Vol 29 (7) ◽

pp. 1292-1301 ◽

Cited By ~ 195

Author(s):

Hui Li ◽

Mao-hua Zhang ◽

Jin-ping Ou

Keyword(s):

Fatigue Performance ◽

Nano Particles ◽

Flexural Fatigue

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Use of Digital Image Correlation for the Evaluation of Flexural Fatigue Behavior of Asphalt Beams with Geosynthetic Interlayers

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2631-06 ◽

2017 ◽

Vol 2631 (1) ◽

pp. 55-64 ◽

Cited By ~ 11

Author(s):

Vinay Kumar V ◽

Sireesh Saride

Keyword(s):

Digital Image Correlation ◽

Digital Image ◽

Digital Images ◽

Fatigue Behavior ◽

Bottom Layer ◽

Fatigue Performance ◽

Image Correlation ◽

Bending Test ◽

Flexural Fatigue ◽

Tensile Strains

In this study, the flexural fatigue performance of two-layer asphalt beams with and without geosynthetic interlayers was evaluated with a digital image correlation (DIC) technique. A field scenario was simulated by considering an old, destressed pavement as the bottom layer with a compacted bituminous mix as an overlay. An appropriate tack coat and geosynthetic interlayer were at the interface. The digital images were recorded at a specific interval of load cycles during a repeated load four-point bending test. The displacement fields obtained from the digital images were analyzed so that the crack width, crack height, and tensile strains could be obtained and the crack initiation and propagation phenomena studied. The deformation data obtained from the DIC analysis were validated with the vertical deformations measured through linear variable differential transformers. The DIC results correlated very well with the measured data. The DIC data indicated that the tensile strains were as high as 4.75% at the crack tip in the control specimen compared with 1.42% in a polyester grid interlayered specimen at the failure of the corresponding specimens. With the inclusion of interlayers, the fatigue performance of the two-layer asphalt beam specimens improved by about 39, 12, and 1.7 times for Specimens I1, I2, and I3, respectively.

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Flexural fatigue performance and electrical resistance response of carbon nanotube-based polymer composites at cryogenic temperatures

Cryogenics ◽

10.1016/j.cryogenics.2013.12.004 ◽

2014 ◽

Vol 59 ◽

pp. 44-48 ◽

Cited By ~ 5

Author(s):

Zhijuan Wei ◽

Tomo Takeda ◽

Fumio Narita ◽

Yasuhide Shindo

Keyword(s):

Carbon Nanotube ◽

Polymer Composites ◽

Electrical Resistance ◽

Fatigue Performance ◽

Cryogenic Temperatures ◽

Resistance Response ◽

Flexural Fatigue

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Research on Flexural Fatigue of Fiber Bundles for Lay-Flat Hose

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.320.512 ◽

2013 ◽

Vol 320 ◽

pp. 512-517

Author(s):

Zhong Yao Huang ◽

Li Hai Cai ◽

Jian Xiong Yang

Keyword(s):

Liquid Crystal ◽

High Strength ◽

Polyester Fiber ◽

Fatigue Performance ◽

Fiber Bundles ◽

Chain Flexibility ◽

Bending Fatigue ◽

Flexural Fatigue ◽

Fatigue Development ◽

Bending Fatigue Test

This paper studies the flexural fatigue performance for hose reinforcement layer fiber bundles including polyester fibers, para-aramid fiber and liquid crystal polyester fiber. Bending fatigue life and changes of three fiber bundles strength during the course of fatigue development were measured. Morphology of three fiber bundles was observed by scanning electron microscopy. From the analysis of the molecular structure of the three fibers, the Molecular chain flexibility is one of the main factors of impacting resistance to bending fatigue performance. Liquid crystal polyester fiber bundles have excellent mechanical properties and the high strength retention in bending fatigue test, which is an ideal material for the production of high-strength hose.

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