نتایج جستجو برای: surface plasticity

تعداد نتایج: 690855  

2016
Y. M. Lu J. F. Zeng S. Wang B. A. Sun Q. Wang J. Lu S. Gravier J. J. Bladin W. H. Wang M. X. Pan C. T. Liu Y. Yang

Room-temperature plasticity in metallic glasses (MGs) is commonly associated with local structural heterogeneity; however, direct observation of the subtle structural change caused by plasticity is vitally important but the data are extremely scarce. Based on dynamic atomic force microscopy (DAFM), here we show that plasticity-induced structural evolution in a Zr-Ni MG can be revealed via nano-...

2015
J. Kowal S. Gungor M. E. Fitzpatrick

The contour method of residual stress measurement has recently been adapted to measure fractured, rather than cut specimens. The fracture contour method was capable of determining normal residual stresses acting prior to the planestrain failure of a large aluminium alloy forging, but shear residual stresses could not be measured (Prime et al., 2014, Eng. Fract. Mech., 116, 158-171). We demonstr...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2005
Xiu Sun Yun Zhao Marina E Wolf

Addiction is believed to involve glutamate-dependent forms of synaptic plasticity that promote the formation of new habits focused on drug seeking. We used primary cultures of rat prefrontal cortex (PFC) neurons to explore mechanisms by which dopamine-releasing psychomotor stimulants such as cocaine and amphetamine influence synaptic plasticity, focusing on AMPA receptor trafficking because of ...

2017
F Stephen Dobson Peter H Becker Coline M Arnaud Sandra Bouwhuis Anne Charmantier

A major question for conservationists and evolutionary biologists is whether natural populations can adapt to rapid environmental change through micro-evolution or phenotypic plasticity. Making use of 17 years of data from a colony of a long-distant migratory seabird, the common tern (Sterna hirundo), we examined phenotypic plasticity and the evolutionary potential of breeding phenology, a key ...

Journal: :IPTEK: The Journal for Technology and Science 2021

This paper investigates the possibility of using a multi-surface plasticity model to predict shear failure in reinforced concrete beams. The analysis is carried out in-house software called 3D-NLFEA. constitutive for material based on plasticity-fracture model, which had previously developed simulate behavior cover spalling columns. To obtain asymmetric pattern, random properties imperfection e...

Journal: :INTERNATIONAL JOURNAL OF DESIGN AND MANUFACTURING TECHNOLOGY 2018

Journal: :computational methods in civil engineering 2010
m. veiskarami m. jahanandish a. ghahramani

in shallow foundations, the third bearing capacity factor, n, has been found to show a decreasing tendency with increasing the foundation size. it is supported by experimental observations and related mainly to stress level dependent nature of the soil. on the other hand, the bearing capacity is often obtained theoretically without consideration of the foundation vertical displacements. in thi...

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