Results 51 to 60 of about 543,240 (305)

Relaxation oscillations and negative strain rate sensitivity in the Portevin - Le Chatelier effect

, 2000
A characteristic feature of the Portevin - Le Chatelier effect or the jerky flow is the stick-slip nature of stress-strain curves which is believed to result from the negative strain rate dependence of the flow stress.
A. Arneodo, A. H. Cottrell, A. Milik, A. Portevin, A. Rosen, A. van den Beukel, B. Deng, B. J. Brindley, C. Caroli, D. Barkley, D. Maugis, F. Heslot, F. Le Chatelier, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, G. Ananthakrishna, H. Neuhäuser, L. P. Kubin, L. P. Kubin, L. P. Kubin, M. A. Lebyodkin, M. Bekele, M. Bekele, M. J. B. Hauser, M. T. M. Koper, O. E. Rössler, P. G. McCormick, P. Penning, S. J. Noronha, S. J. Noronha, V. Jeanclaude, W. Eckhaus   +35 more
core   +1 more source

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Stress measurements in the earth's crust - recrystallized grain size piezometry revisited [PDF]

, 2012
EGU2012-13016 The dynamically recrystallized grain size is the most reliable paleo-piezometer to determine the differential stress in the Earth’s crust and mantle.
Stipp, Michael
core  

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Literature study report of plasticity induced anisotropic damage modeling for forming processes [PDF]

, 2009
A literature study report covering the topics; micromechanics of damage, continuum damage mechanics (gurson model and effective variable concept) and the dependence of damage on strain rate and ...
Niazi, M.S.
core   +1 more source

Rate Dependence and Role of Disorder in Linearly Sheared Two-Dimensional Foams

, 2008
The shear flow of two dimensional foams is probed as a function of shear rate and disorder. Disordered foams exhibit strongly rate dependent velocity profiles, whereas ordered foams show rate independence.
D. Weaire, Gijs Katgert, Martin van Hecke, Matthias E. Möbius   +3 more
core   +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

Constitutive Model Based on Stress Relaxation for Composite Modified Double-Base Propellants and Master Curve of Relaxation Modulus

Aerospace
This study investigates the constitutive model and relaxation modulus master curve of composite modified double-base (CMDB) propellants through uniaxial constant-rate tensile tests and stress relaxation tests.
Yao Li, Jinsheng Xu, Changsheng Zhou, Xiong Chen, Xiumin Yang   +4 more
doaj   +1 more source

Effects of boundary condition and cell structure on dynamic axial crushing honeycomb

Mechanical Engineering Journal, 2018
The dynamic axially crushing behavior of metal honeycombs was studied with placing emphasis on the effects of boundary condition and cell structure on its characteristics as an energy absorber. Numerical honeycomb models of some metal foil materials were
Tsutomu UMEDA, Koji MIMURA
doaj   +1 more source

A Degradation Function Consistent with Cocks–Ashby Porosity Kinetics [PDF]

, 2018
The load carrying capacity of ductile materials degrades as a function of porosity, stress state and strain-rate. The effect of these variables on porosity kinetics is captured by the Cocks–Ashby model; however, the Cocks–Ashby model does not account for
Moore, John A.
core   +1 more source