Experimental Study of Dynamic Mechanical Response and Energy Dissipation of Rock Having a Circular Opening Under Impact Loading

2021 ◽  
Vol 38 (2) ◽  
pp. 1111-1124
Author(s):  
Hao Wu ◽  
Bing Dai ◽  
Li Cheng ◽  
Rong Lu ◽  
Guoyan Zhao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Impact Loading ◽  
Mechanical Response ◽  
Circular Opening ◽  
Dynamic Mechanical

scholarly journals Experiments on Mechanical Response and Energy Dissipation Behavior of Rockburst-Prone Coal Samples Under Impact Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Jinbao Tang ◽  
Sheng Li ◽  
Guangsheng Qin ◽  
Wanjie Lu ◽  
Zhijie Zhu ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Energy Dissipation ◽  
Strain Rate ◽  
Impact Loading ◽  
Mechanical Response ◽  
Peak Stress ◽  
Dynamic Elastic Modulus ◽  
Dissipated Energy ◽  
Peak Strain ◽  
Dynamic Mechanical

To reveal the dynamic mechanical response and energy dissipation behavior of rockburst-prone coal samples under impact loading, the compressive experiments on Xinzhouyao coals (prone) and Machang coals (nonprone) under different impact loadings were carried out using the Split Hopkinson Pressure Bar (SHPB). The dynamic mechanical properties were studied, including dynamic elastic modulus, strain rate, peak stress, peak strain, dynamic increment factor, and energy dissipation. The results show that the dynamic elastic modulus, peak stress, and peak strain of both prone and nonprone coals perform an obvious correlation with the increase of strain rate. The strain rate strengthening effect on the dynamic elastic modulus and compressive strength of rockburst-prone coal samples are more significant, reflected by the greater increment with the increase of strain rate, while the dynamic increment factors of both prone and nonprone coals show apparent strain rate strengthening. The incident, reflected, and transmitted energy of both two coals linearly increases with the impact velocity, although the increased rate may be different. The dissipated energy of rockburst-prone coal samples increases faster, while the rate of the increase of the dissipated energy is more stable with strain rate. The results may provide an important reference for revealing the failure law of engineering-scaled coal mass suffered by rockburst.

The Study on Dynamic Mechanical Response under Staged Loading

2014 ◽  
Vol 501-504 ◽  
pp. 115-119
Author(s):  
Fei Luo ◽  
Zhan Yuan Zhu ◽  
Lin Zhi Cui ◽  
Gao Min Li ◽  
Yi Ting He
Keyword(s):  
Energy Dissipation ◽  
Residual Strain ◽  
Dynamic Stress ◽  
Mechanical Response ◽  
Stress Amplitude ◽  
Testing Machine ◽  
Morphological Characteristics ◽  
Confining Pressure ◽  
Dynamic Mechanical ◽  
Microscopic Damage

Based on MTS-810 type vibration testing machine, morphological characteristics of hysteretic curves of frozen clay are quantitatively studied, and dynamic mechanical response are analyzed consisting of stiffness, viscosity, degree of microscopic damage, residual strain and energy dissipation. The studies have shown that the higher vibration frequencies are, the greater the stiffness is, while the smaller viscosity, the degree of microscopic damage, residual strain and energy dissipation are. Stiffness, viscosity, degree of microscopic damage, residual strain and energy dissipation are less affected by confining pressure. With increasing dynamic stress amplitude, stiffness decreases gradually, while viscosity, degree of microscopic damage, residual strain and energy dissipation increase gradually.

scholarly journals Mechanical Response and Energy Dissipation Analysis of Heat-Treated Granite Under Repeated Impact Loading

2019 ◽  
Vol 59 (1) ◽  
pp. 275-296 ◽  
Author(s):  
Zhiliang Wang ◽  
Nuocheng Tian ◽  
Jianguo Wang ◽  
Shengqi Yang ◽  
Guang Liu
Keyword(s):  
Energy Dissipation ◽  
Impact Loading ◽  
Mechanical Response ◽  
Repeated Impact ◽  
Heat Treated

scholarly journals Tuning of Static and Dynamic Mechanical Response of LPBFed AlSi10Mg Lattice Structures through heat Treatments

2021 ◽  
Author(s):  
Jacopo Fiocchi ◽  
Chiara Bregoli ◽  
Giulio Gerosa ◽  
Ausonio Tuissi ◽  
Carlo Alberto Biffi
Keyword(s):  
Mechanical Response ◽  
Heat Treatments ◽  
Lattice Structures ◽  
Dynamic Mechanical

scholarly journals High-strain-rate mechanical response of HTPE propellant under SHPB impact loading

AIP Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 035145
Author(s):  
Heng-ning Zhang ◽  
Hai Chang ◽  
Jun-qiang Li ◽  
Xiao-jiang Li ◽  
Han Wang
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Impact Loading ◽  
Mechanical Response ◽  
High Strain

Experimental study of impact loading effect on bridge substructures including piles

Structures ◽  
2021 ◽  
Vol 31 ◽  
pp. 419-427
Author(s):  
Muhamad Aziman Abdul Malek ◽  
Raizal S.M. Rashid ◽  
Ahmad Azim Shukri ◽  
Mohamed El-Zeadani
Keyword(s):  
Experimental Study ◽  
Impact Loading ◽  
Loading Effect ◽  
Bridge Substructures
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