Results 21 to 30 of about 36,960 (267)

A criterion for identifying hydraulic fractures crossing natural fractures in 3D space

open access: yesPetroleum Exploration and Development, 2014
Based on the analysis of the stress fields near the hydraulic fracture tip and on the natural fracture surface, a criterion for identifying hydraulic fractures crossing natural fractures was proposed. A series of hydraulic fracturing tests were conducted
Wan CHENG   +5 more
doaj   +1 more source

Experimental and Numerical Investigation on Dynamic Shear Behavior of 30CrMnSiNi2A Steel Using Flat-Hat Specimens

open access: yesMetals
An absolutely conflicting value for the incorporation of the Lode parameter into a fracture criterion was reported in the literature when predicting the ballistic resistance of metallic plates failing through shear plugging.
Xinke Xiao   +3 more
doaj   +1 more source

Investigation of Failure Mechanism of Al2O3 Specimens Subjected to Three-Point Bending Test

open access: yesFracture and Structural Integrity, 2019
Experimental loading and FEM simulation-based approach at macroscale are utilized to investigate the failure mechanisms of Al2O3 ceramics. Experimental characterization of the microstructure is carried out using SEM.
Mikhail Eremin   +3 more
doaj   +1 more source

Propagation process of hydraulic fracture crossing an orthogonal discontinuity

open access: yesRock and Soil Mechanics, 2023
Massive developed discontinuities are the salient geological features of unconventional oil and gas reservoirs, and the hydraulic fractures’ capabilities of crossing the discontinuities concern the stimulation effects of hydraulic fracturing.
CHEN Lei   +4 more
doaj   +1 more source

Fracture Criterion of Notched Plates of FRP

open access: yesJSME international journal. Ser. 1, Solid mechanics, strength of materials, 1988
The influence of notches on static tensile strength was studied for a composite material. Tension tests of notched plate for glass cloth/epoxy laminates have been carried out for a wide range of notch tip radii. All notched specimens failed in a brittle manner through the formation of small deformation near the notch tip.
HYAKUTAKE, Hiizu   +2 more
openaire   +3 more sources

Compression-shear tension fracture criteria for rock-like materials considering geometric characteristics of cracks and T-stresses

open access: yesYantu gongcheng xuebao, 2020
In order to explore the fracture mechanism of open cracks under compression-shear stress in rock-like materials, a relative passivation coefficient and a relative critical size are introduced, and a compression-shear-tension fracture criterion ...
WANG Jun-jie 1, 2, 3, HUANG Shi-yuan 1, 2, 3, GUO Wan-li 3, ZHAO Tian-long 1, 2, 3
doaj   +1 more source

Justification of fracture criteria for salt rocks

open access: yesFracture and Structural Integrity, 2022
The study of salt rocks deformation and fracture processes is an essential part of mining parameters justification for mineral salt deposits. The results of uniaxial compression tests on large salt rock specimens are presented as a loading curve and ...
Alexander Baryakh, Andrey Tsayukov
doaj   +5 more sources

Research on Structural Destructive Behavior of Space Nuclear Reactor Impact on Ground Surface

open access: yesYuanzineng kexue jishu
Space nuclear reactors have gained increasing importance in deep space exploration missions, with launch abort scenarios leading to ground surface impact representing a core consideration in reactor safety design.
XU Dawei, DAI Shoutong, TONG Mengyu, LYU Zheng
doaj   +1 more source

Modelling of Crack Growth Using a New Fracture Criteria Based Peridynamics [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2019
Peridynamics (PD) is a nonlocal continuum theory based on integro-differential equations without spatial derivatives. The elongation fracture criterion is implicitly incorporated in the PD theory, and fracture is a natural outcome of the simulation.
Jinhai Zhao
doaj   +1 more source

Application of Finite Element Method to Analyze the Influences of Process Parameters on the Cut Surface in Fine Blanking Processes by Using Clearance-Dependent Critical Fracture Criteria

open access: yesJournal of Manufacturing and Materials Processing, 2018
The correct choice of process parameters is important in predicting the cut surface and obtaining a fully-fine sheared surface in the fine blanking process.
Phyo Wai Myint   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy