Cyclic Strain Amplitude Impact on the Soil Dynamic Parameters of Conventional Railway Track-Bed Materials

2016 ◽  
Author(s):  
F. Lamas-Lopez ◽  
Y.J. Cui ◽  
T. Zhang ◽  
J.-C. Dupla ◽  
N. Calon ◽  
...  
Keyword(s):  
Strain Amplitude ◽  
Cyclic Strain ◽  
Railway Track ◽  
Dynamic Parameters ◽  
Bed Materials ◽  
Cyclic Strain Amplitude ◽  
Soil Dynamic

scholarly journals Flat-Cladding Fiber Bragg Grating Sensors for Large Strain Amplitude Fatigue Tests

2021 ◽  
Author(s):  
Aihen Feng ◽  
Daolun Chen ◽  
Cheng Li ◽  
Xijia Gu
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Amplitude ◽  
Large Strain ◽  
Hysteresis Loops ◽  
Cyclic Strain ◽  
Fatigue Tests ◽  
Bragg Grating ◽  
Large Strain Amplitude ◽  
Bragg Grating Sensor ◽  
Cyclic Strain Amplitude

We have successfully developed a flat-cladding fiber Bragg grating sensor for large cyclic strain amplitude tests of up to ±8,000 με. The increased contact area between the flat-cladding fiber and substrate, together with the application of a new bonding process, has significantly increased the bonding strength. In the push-pull fatigue tests of an aluminum alloy, the plastic strain amplitudes measured by three optical fiber sensors differ only by 0.43% at a cyclic strain amplitude of ±7,000 με and 1.9% at a cyclic strain amplitude of ±8,000 με. We also applied the sensor on an extruded magnesium alloy for evaluating the peculiar asymmetric hysteresis loops. The results obtained were in good agreement with those measured from the extensometer, a further validation of the sensor.

Effect of the cyclic strain amplitude on the hot dynamic restoration of copper

2001 ◽  
Vol 44 (1) ◽  
pp. 187-193 ◽  
Author(s):  
I.P Pinheiro ◽  
R Barbosa ◽  
P.R Cetlin
Keyword(s):  
Strain Amplitude ◽  
Cyclic Strain ◽  
Cyclic Strain Amplitude

scholarly journals Flat-Cladding Fiber Bragg Grating Sensors for Large Strain Amplitude Fatigue Tests

2021 ◽  
Author(s):  
Aihen Feng ◽  
Daolun Chen ◽  
Cheng Li ◽  
Xijia Gu
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Amplitude ◽  
Large Strain ◽  
Hysteresis Loops ◽  
Cyclic Strain ◽  
Fatigue Tests ◽  
Bragg Grating ◽  
Large Strain Amplitude ◽  
Bragg Grating Sensor ◽  
Cyclic Strain Amplitude

We have successfully developed a flat-cladding fiber Bragg grating sensor for large cyclic strain amplitude tests of up to ±8,000 με. The increased contact area between the flat-cladding fiber and substrate, together with the application of a new bonding process, has significantly increased the bonding strength. In the push-pull fatigue tests of an aluminum alloy, the plastic strain amplitudes measured by three optical fiber sensors differ only by 0.43% at a cyclic strain amplitude of ±7,000 με and 1.9% at a cyclic strain amplitude of ±8,000 με. We also applied the sensor on an extruded magnesium alloy for evaluating the peculiar asymmetric hysteresis loops. The results obtained were in good agreement with those measured from the extensometer, a further validation of the sensor.

Cyclic strain amplitude-dependent fatigue mechanism of gradient nanograined Cu

2020 ◽  
Vol 196 ◽  
pp. 252-260
Author(s):  
Q.S. Pan ◽  
J.Z. Long ◽  
L.J. Jing ◽  
N.R. Tao ◽  
L. Lu
Keyword(s):  
Strain Amplitude ◽  
Cyclic Strain ◽  
Cyclic Strain Amplitude ◽  
Fatigue Mechanism
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