Results 71 to 80 of about 4,685,644 (340)

Signatures of Plastic Instabilities and Strain Localization in Acoustic Emission Time-Series

Metals
Acoustic emission (AE) is a powerful tool for investigating the intermittency of plastic flow by capturing elastic waves generated by dislocation rearrangements under load. This study explores the correlation between AE and plastic instabilities, such as
Alexey Vinogradov
doaj   +1 more source

Shear strain localization in elastodynamic rupture simulations

Geophysical Research Letters, 2008
We study strain localization as an enhanced velocity weakening mechanism on earthquake faults. Fault friction is modeled using Shear Transformation Zone (STZ) Theory, a microscopic physical model for non‐affine rearrangements in granular fault gouge. STZ
Eric G. Daub, M. Lisa Manning, Jean M. Carlson   +2 more
doaj   +1 more source

Strain Localization during Equal-Channel Angular Pressing Analyzed by Finite Element Simulations

Metals, 2018
Equal-Channel Angular Pressing (ECAP) is a method used to introduce severe plastic deformation into a metallic billet without changing its geometry.
Tobias Daniel Horn, Christian Bert Silbermann, Philipp Frint, Martin Franz-Xaver Wagner, Jörn Ihlemann   +4 more
doaj   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Mechanical and material heterogeneity, strain localization and deformation rate effects in crushable expanded polystyrene foams

Frontiers in Mechanical Engineering
Low-density expanded polystyrene (EPS) foams are widely used in lightweight energy absorption systems such as helmets due to their ability to readily mold into complex geometries.
Francis Yao, Meet Joshi, Megan Bland-Rothgeb, Peter Cripton, Duane Cronin, John Magliaro   +5 more
doaj   +1 more source

Comparing In Situ DIC Results from an Etched Surface with a Gold Speckled Surface

Metals, 2019
A ferrite-pearlite two-phase steel was investigated using in situ scanning electron microscope (SEM) tensile testing combined with digital image correlation (DIC). Two different speckled patterns were used and compared.
Christian Oen Paulsen, Egil Fagerholt, Tore Børvik, Ida Westermann   +3 more
doaj   +1 more source

Electron localization in self-assembled Si/Ge(111) quantum dots

, 2015
Electron localization in the Si/Ge heterosystem with Si quantum dots (QDs) was studied by transport and electron spin resonance (ESR) measurements. For Si QD structures grown on Ge(111) substrates, the ESR signal with g-factor $g=2.0022\pm0.0001$ and ESR
Deryabin, Alexander, Dvurechenskii, Anatoly, Kulik, Leonid, Stepina, Natalia, Zinovieva, Aigul, Zinovyev, Vladimir   +5 more
core   +1 more source

Rate dependent shear bands in a shear transformation zone model of amorphous solids [PDF]

, 2008
We use Shear Transformation Zone (STZ) theory to develop a deformation map for amorphous solids as a function of the imposed shear rate and initial material preparation.
D. Griggs, E. G. Daub, J. M. Carlson, J. S. Langer, M. Falk, M. L. Manning   +5 more
core   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

A Review of Theoretical, Experimental and Numerical Advances on Strain Localization in Geotechnical Materials

Applied Sciences
Strain localization is a critical phenomenon in geotechnical materials, serving as a precursor to the failure of engineering structures such as slopes, foundations, and tunnels. This paper presents a comprehensive review of the theoretical, experimental,
Yonghui Li, Anyuan Sun, Feng Zhu
doaj   +1 more source