Results 11 to 20 of about 6,089 (210)

Dynamic characteristics and constitutive model of coal samples with different length diameter ratio

矿业科学学报, 2023
In order to study the dynamic performance of coal samples with different length diameter ratio under impact load, this paper used an improved Hopkinson compression bar experimental device (ϕ75 mm), and carried out the impact compression experiments under
Xie Beijing, Luan Zheng, Chen Dongxin, Zhong Shiqing   +3 more
doaj   +1 more source

Towards Standardising SHPB Testing - A Round Robin Exercise [PDF]

EPJ Web of Conferences, 2018
The Split Hopkinson Pressure Bar (SHPB) test, while widely utilised for high strain rate tests, has yet to be standardised. As an exploratory step towards developing a standard test method or protocol, a Round Robin test series has been conducted between four institutions: (i) Swinburne University of Technology, Australia (ii) University of São Paulo ...
Govender, R., Kariem, M., Ruan, D., Santiago, R., Wei Shu, D., Alves, M., Lu, G., Nurick, G., Langdon, G.   +8 more
openaire   +3 more sources

Experimental study on the stress wave attenuation effect of filled cracks in rocks under confining pressure

Rock and Soil Mechanics, 2021
To study the effectiveness of filled cracks as a means of anti-blasting and wave-elimination for underground protective structures, 36 one-dimensional impact tests were carried out on the intact rock specimens and rock specimens with filled cracks using ...
LIU Xin , XU Hong-fa, FAN Peng-xian, GENG Han-sheng, MO Jia-quan, WANG De-rong   +5 more
doaj   +1 more source

Experiment study on water-saturated coals after microwave treatment under impact loading

Meikuang Anquan, 2021
The water-saturated coal samples were heated by microwave for 0 s, 50 s, 125 s and 200 s, respectively. After that, a test system consisting of SHPB and high-speed photography apparatus was adopted to study the variation of mechanical parameters, the ...
YAO Junhui, CHEN Hui, GUAN Weiming, WEN Yingyuan, LI Huwei   +4 more
doaj   +1 more source

Dynamic failure characteristics of primary coal-rock combination under hydrostatic pressure

Meitan xuebao, 2023
The surrounding rock of deep roadway is weak and the fissures are developed. Under the influence of mining disturbance, it is easy to cause dynamic disasters and the overall instability failure of coal rock combination is one of key factors inducing ...
Beijing XIE, Zheng LUAN, Tianle LIU, Bowen WU, Shiqing ZHONG   +4 more
doaj   +1 more source

Electrostatic Defrosting. [PDF]

Small Methods
Electrostatic defrosting is pioneered by suspending a high voltage electrode plate over a sheet of frost. As pictured here, electrostatic defrosting was able to remove three quarters of a frost sheet from a superhydrophobic glass substrate. Abstract Electrification of ice has been studied for over half a century, mostly in the context of atmospheric ...
Lolla VY, Zhang H, Socha BZ, Qiao R, Boreyko JB.   +4 more
europepmc   +2 more sources

Experimental study on dynamic mechanical behavior of frozen sandstone with different saturations

Meitan kexue jishu, 2023
Water content is one of the critical factors affecting frost damage to rock masses in alpine regions. A dynamic disturbance load further complicates the issue.
Junce XU, Hai PU, Ziheng SHA
doaj   +1 more source

Experimental study on energy dissipation and failure characteristics of rock at depth under non-hydrostatic pressure condition

Meitan kexue jishu, 2023
Deep buried rock is often in a non-hydrostatic initial ground stress field, and the different stress states lead to different rock response under dynamic loading.
Shizheng FANG, Renshu YANG, Weiyu LI, Yongliang LI, Jun CHEN   +4 more
doaj   +1 more source

X-ray microtomographic characterization and quantification of the strain rate dependent failure mechanism in cenosphere epoxy syntactic foams [PDF]

, 2016
This work investigates the failure mechanism in cenosphere epoxy syntactic foams at the quasi-static and dynamic strain rates. Split-Hopkinson pressure bar experiments are controlled to stop dynamic deformation of the foams at various strain stages.
Adrien, Ahmadi, Awaja, Das, Dou, Gu, Huang, Huang, Kim, Kishore, Klaus, Labella, Li, Li, Li, Li, Maire, Orbulov, Pellegrino, Peroni, Song, Veseniak, Viot, Wang, Woldesenbet, Woldesenbet, Wouterson   +26 more
core   +1 more source

Pulse shaping with soft material for SHPB [PDF]

SCIENTIA SINICA Technologica, 2016
In the split Hopkinson pressure bar (SHPB) experiment, the state of dynamic stress equilibrium should be achieved over most of the test duration. Therefore, pulse shaping techniques which can modify the profile of the incident pulse are usually needed. In this paper, a new method for SHPB incident pulse shaping is presented.
QingPing ZHANG, XiCheng HUANG, Gang CHEN
openaire   +1 more source