Results 81 to 90 of about 4,423 (210)

Study on Compound Percussive Drilling: Rock‐Breaking Mechanism of High Confining Pressure Formation in the East China Sea

open access: yesEnergy Science &Engineering, Volume 13, Issue 7, Page 3688-3703, July 2025.
ABSTRACT The effect of improving the depth of penetration (ROP) in deep, high‐confining pressure formation is closely related to the rock‐breaking method, which has become a bottleneck restricting the efficient development of oil and gas. Based on the current engineering practice of the Xihu block in the East China Sea Basin, experimental research on ...
Jiwei Li
wiley   +1 more source

Rock Dynamic Fracture Characteristics Based on NSCB Impact Method

open access: yesShock and Vibration, 2018
In 2012, the International Society for Rock Mechanics (ISRM) recommended a new Notched Semicircular Bend (NSCB) method for the determination of dynamic fracture toughness of rock materials, but it did not consider the effect of some uncontrollable ...
Yanbing Wang
doaj   +1 more source

Numerical Study of Dynamic Behaviors of Concrete Under Various Strain Rates

open access: yesArchives of Civil Engineering, 2019
As the dynamic behavior of the concrete is different from that under static load, this research focuses on the study of dynamic responses of concrete by simulating the split Hopkinson pressure bar (SHPB) test.
An H.M., Liu L.
doaj   +1 more source

Prediction of crack propagation and arrest in X100 natural gas transmission pipelines with the strain rate dependent damage model (SRDD). Part 1:A novel specimen for the measurement of high strain rate fracture properties and validation of the SRDD model parameters [PDF]

open access: yes, 2013
A novel specimen for the measurement of strain rate and triaxiality dependent fracture properties of metals is described. The specimen is used in a conventional tensile split Hopkinson pressure bar test.
Oikonomidis, F.   +2 more
core   +2 more sources

Fracturing behaviors of flawed granite induced by dynamic loadings: A study based on DIP and PFC

open access: yesDeep Underground Science and Engineering, Volume 4, Issue 2, Page 290-304, June 2025.
This research examines granite's mechanical properties under split‐Hopkinson pressure bar testing, focusing on factors such as grain size and flaw dimensions. The study reveals that tension cracks are prevalent across grain sizes, with most intergrain cracks occurring between feldspar and quartz.
Xiao Wang   +5 more
wiley   +1 more source

Electromagnetic Interference in Measurements of Radial Stress During Split Hopkinson Pressure Bar Experiments [PDF]

open access: yes, 2017
Split Hopkinson pressure bar experiments on soils are often carried out using a rigid steel confining ring to provide plane strain conditions, and measurements of the circumferential strain in the ring can be used to infer the radial stress on the ...
A Tyas   +11 more
core   +2 more sources

Image Based Ultrasonic Shaking Test (IBUS) for Characterisation of High Strain Rate Response of Cortical Bone

open access: yesStrain, Volume 61, Issue 3, June 2025.
ABSTRACT In this study, we present an application of the image‐based ultrasonic shaking (IBUS) test to characterise viscoelastic properties of bovine cortical bone. This method relies on taking an ultra‐high speed video of a vibrating specimen and the properties are calculated entirely from kinematic data using inertial forces in the specimen as a load
Aleksander Marek   +2 more
wiley   +1 more source

Dynamic Characterization of Orthogneiss Rock Subjected to Intermediate and High Strain Rates in Tension [PDF]

open access: yes, 2018
The dynamic characterization of rocks under intermediate and high strain rates is fundamental to understand the material behavior in case of heavy earthquakes and dynamic events.
Cadoni, Ezio
core  

Effect of Loading Rate on Tensile Strength and Fracture Stress of Chocolate

open access: yesJournal of Texture Studies, Volume 56, Issue 2, April 2025.
Five different chocolates (extra dark, dark, milk, white, and ruby) were tested using two approaches (low/high‐loading rate) to determine their mechanical behavior. Records of chocolate deformation from a high‐speed camera were presented. Fracture of specimens starts in the middle of the specimen and tensile fracture stress increases with the loading ...
Šárka Nedomová   +7 more
wiley   +1 more source

NUMERICAL SIMULATION OF SHPB DYNAMIC COMPRESSION TEST OF CONCRETE

open access: yesJixie qiangdu, 2018
Split Hopkinson pressure bar(SHPB) tests are widely used for testing material mechanism behavior under high strain rates,A series of SHPB numerical tests were done based on K&C local concrete damage model,The stress-strain curves of the concrete ...
LI XiaoQin, CHEN BaoQi, DU Xi, DING ZuDe
doaj  

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