Dynamic Properties of Thermally Treated Granite Subjected to Cyclic Impact Loading

2018 ◽  
Vol 52 (4) ◽  
pp. 991-1010 ◽  
Author(s):  
Pin Wang ◽  
Tubing Yin ◽  
Xibing Li ◽  
Shuaishuai Zhang ◽  
Lv Bai
Keyword(s):  
Impact Loading ◽  
Dynamic Properties ◽  
Cyclic Impact Loading ◽  
Cyclic Impact ◽  
Thermally Treated

Endurance of 55S2 steel under cyclic-impact loading in the presence of liquid media

1973 ◽  
Vol 5 (5) ◽  
pp. 621-624
Author(s):  
V. V. Ermolaev ◽  
A. V. Morzhakov ◽  
A. V. Topkaev
Keyword(s):  
Impact Loading ◽  
Liquid Media ◽  
Cyclic Impact Loading ◽  
Cyclic Impact

Transition of the Fracture Mode of Smooth Specimens of SS400 Steel of Cyclic Impact Loading

2017 ◽  
Vol 2017.92 (0) ◽  
pp. M803
Author(s):  
Kenichiro HASHIMOTO ◽  
Fumiyuki OHARA ◽  
Kazuaki HINO ◽  
Hiroaki HASHIMOTO ◽  
Koji MIMURA ◽  
...  
Keyword(s):  
Fracture Mode ◽  
Impact Loading ◽  
Cyclic Impact Loading ◽  
Cyclic Impact

Deformation–wear transition map of DLC coating under cyclic impact loading

Wear ◽  
2012 ◽  
Vol 274-275 ◽  
pp. 435-441 ◽  
Author(s):  
Mohd Fadzli Bin Abdollah ◽  
Yuto Yamaguchi ◽  
Tsuyoshi Akao ◽  
Naruhiko Inayoshi ◽  
Nobuyuki Miyamoto ◽  
...  
Keyword(s):  
Impact Loading ◽  
Dlc Coating ◽  
Transition Map ◽  
Cyclic Impact Loading ◽  
Cyclic Impact ◽  
Wear Transition

scholarly journals Influence of Cyclic Impact Loading and Axial Stress on Dynamic Mechanical Properties of Burst-Prone Coal

2021 ◽  
Vol 2021 ◽  
pp. 1-10 ◽  
Author(s):  
Shuang Gong ◽  
Zhen Wang ◽  
Lei Zhou ◽  
Wen Wang
Keyword(s):  
Mechanical Properties ◽  
Impact Loading ◽  
Coal Sample ◽  
Impact Load ◽  
Axial Stress ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Cyclic Impact Loading ◽  
Cyclic Impact ◽  
The Impact

High in-situ stress and frequent dynamic disturbances caused by the mining process in deep coal mines can easily induce dynamic disasters such as coal burst. We conducted laboratory experiments to assess the effects of the axial stress loading and dynamic cyclic impact loading on the dynamic mechanical properties of burst-prone coals by using a modified split Hopkinson pressure bar (SHPB). Comparisons were made using two types of burst-prone and burst-resistant coal samples. The mineral components, organic macerals, and dynamic mechanical features of both burst-prone and burst-resistant coal samples were comparatively analyzed based on the obtained X-ray diffraction (XRD), optical microscope observations, and dynamic compressive stress-strain curves, respectively. The results of the microstructure analysis indicated a larger difference between the minimum and maximum reflectances of vitrinite for burst-prone coal. Compared to the burst-resistant coal samples, the burst-prone coals contained less corpocollinite and fusinite. While applying a high axial static load combined with cyclic impact load, the coal samples showed the characteristics of fatigue damage. The results also demonstrated that preaxial stress affected the burst resistance of coal samples. The greater the preaxial stress was, the less the coal samples could withstand the dynamic cyclic impact load. In comparison to the burst-resistant coal sample, the burst-prone coal sample showed a larger dynamic compressive strength and a lower deformation. They were also more positively capable of the propagation and activation of the coal burst. We believe that the results of the study are conducive to further understanding of the distribution of microcomponents of burst-prone coals. The results are also beneficial for realizing the dynamic mechanical characteristics of burst-prone coals under the impact of cyclic dynamic load.

307 Effects of Strain Amplitude and Strain rate on Fatigue Strength of Smooth Steel Specimens Subjected to Several Patterns of Cyclic Impact Loading

2015 ◽  
Vol 2015.90 (0) ◽  
pp. 75-77
Author(s):  
Yuya KOEDA ◽  
Ryosuke KUROKI ◽  
Kenta IMOTO ◽  
Koji MIMURA ◽  
Tsutomu UMEDA ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Strain Rate ◽  
Strain Amplitude ◽  
Impact Loading ◽  
Cyclic Impact Loading ◽  
Cyclic Impact

scholarly journals Study on the Static and Dynamic Fracturing Properties of Marble after Being Damaged Dynamically

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Yunqiu Liu ◽  
Anqi Fu ◽  
Binsong Jiang ◽  
Liyuan Yu ◽  
Xiaobing Wang
Keyword(s):  
Fracture Toughness ◽  
Impact Loading ◽  
Split Hopkinson Pressure Bar ◽  
Cumulative Damage ◽  
Bending Tests ◽  
Three Point Bending ◽  
Cyclic Impact Loading ◽  
Loading Tests ◽  
Cyclic Impact ◽  
The Impact

A split Hopkinson pressure bar (SHPB) system was first used to perform the cyclic impact loading tests on notched semicircular bend (NSCB) marble specimens. Then, static and dynamic three-point bending tests were conducted on these dynamically damaged specimens, respectively. In the cyclic impact loading tests, the dynamic elastic modulus decreases gradually as the impact number increases, but dynamic cumulative damage exhibits a growing trend. In the static and dynamic three-point bending tests, when dynamic cumulative damage is less than 0.345, the dynamic fracture toughness values are larger than the static fracture toughness values, but the experimental data exhibit the opposite results when dynamic cumulative damage ranges from 0.345 to 0.369. Through the quantitative analysis of fracture surface morphologies, the roughness and area of the fracture surfaces increase with an increasing dynamic cumulative damage. Under the same dynamic cumulative damage of the specimens, both the roughness and area of the surfaces fractured by static three-point bending are larger than those fractured by dynamic three-point bending.

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