Results 31 to 40 of about 161,530 (168)

A New Bursting Liability Evaluation Index for Coal –The Effective Elastic Strain Energy Release Rate

open access: yesEnergies, 2019
Because both faults and cleats exist in coal, sharp stress drops occur during loading when coal is deformed. These drops occur during the pre-peak stage and are accompanied by sudden energy releases.
Zhiguo LU   +6 more
doaj   +1 more source

Computation of mode I Strain Energy Release Rate of symmetrical and asymmetrical sandwich structures using mixed finite element

open access: yesFracture and Structural Integrity, 2021
The use of composite materials is on the rise in different engineering fields. The main advantage of these materials for the aerospace industry being their low weight for excellent mechanical qualities. The analysis of failure modes, such as delamination,
Mohamed Ben Ali Amina, Bouziane Salah
doaj   +1 more source

Propagation of Matrix Cracking and Induced Delaminatin in Cross-Ply Composite Beams Subjected to Bending Loads [PDF]

open access: yesMechanics of Advanced Composite Structures, 2019
Due to the mismatch of mechanical properties in composite laminates, propagation of delami-nation is considered as a severe damage mechanism in beams with various lay-up configurations.
Mohammad Bahrami, Amin Farrokhabadi
doaj   +1 more source

Experimental study on the effect of loading rate on the strain energy accumulation and release during the weakening process of circular-tunnel

open access: yesGeomechanics and Geophysics for Geo-Energy and Geo-Resources
The weakening of circular tunnels is a global problem that has not been resolved satisfactorily. In the tunnelling process, surrounding rock of circular-tunnel performs a process of “excavating → weakening → continuous excavating → weakening strengthens”.
Xun You   +4 more
doaj   +1 more source

R-curve Evaluation of Copper and Nickel Single Crystals Using Atomistic Simulations

open access: yesCrystals, 2018
The technique of molecular statics (MS) simulation was employed to determine the crack growth resistance curve of Cu and Ni single crystals. Copper and Ni single crystal nanoplates with an edge crack subjected to a tensile displacement were simulated ...
Xiao Ru Zhuo   +2 more
doaj   +1 more source

The crack kinking out of an interface [PDF]

open access: yesTheoretical and Applied Mechanics, 2005
Kinking of a plane strain crack out of an interface between the two dissimilar isotropic elastic materials is analyzed. Analysis is focused on the initiation of kinking and thus the segment of the crack leaving the interface is imagined to be short ...
Veljković Jelena M.
doaj   +1 more source

Mixed-mode I/III fracture study of sandwich beams

open access: yesCogent Engineering, 2015
The capacity of prestressed split-cantilever beam (SCB) for investigation of mixed-mode I/III fracture in foam core sandwich constructions was evaluated theoretically. The fracture was studied in terms of the strain energy release rate. In this relation,
V. Rizov
doaj   +1 more source

Fracture toughness and critical strain energy release rate of dental amalgam [PDF]

open access: yesJournal of Materials Science, 1978
Fracture toughness, critical strain energy release rate and critical stress intensity factor were determined for lathe-cut, spherical, admixed, and two atomized high-copper dental amalgams. At a loading rate of 0.005cm min−1 for 24-hour samples, the spherical amalgam had the highest resistance to unstable crack propagation.
Powers, John M.   +2 more
openaire   +2 more sources

Earthquake volume, fault plane area, seismic energy, strain, deformation and related quantities

open access: yesAnnals of Geophysics, 1964
An effort is made to improve Benioff's method for investigation<br />of strain release in aftershock sequences. The improvement<br />may be summarized as follows:<br />1.
S. J. DUDA, M. BATH
doaj   +1 more source

EXPERIMENTAL STUDY OF OBSERVABLE DEFORMATION PROCESS IN FAULT META-INSTABILITY STATE BEFORE EARTHQUAKE GENERATION

open access: yesГеодинамика и тектонофизика, 2020
According to the steady state of fault and energy balance, we provided a new idea to observe the precursors for a stressed fault. The meta-instability (or sub-instability) state of a fault is defined as the transition phase from peak stress to critical ...
Yanshuang Guo   +4 more
doaj   +1 more source

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