نتایج جستجو برای: cyclic plasticity model
تعداد نتایج: 2237656 فیلتر نتایج به سال:
Abstract Martensitic phase transformation and plasticity are two primary mechanisms of deformation in shape memory alloys (SMAs) the interaction between them influences behaviour SMA during cyclic loading, specifically pseudoelasticity effect. This interaction, which occurs microscale, affects reversibility eventually actuation capacity SMAs. In order to capture this a discrete dislocation–tran...
Abstract Micromechanics‐based continuum damage criteria have previously been developed to simulate the initiation of ductile fracture in structural steels under conditions with large‐scale plasticity where conventional mechanics indices are invalid. Such models combined methods crack growth for monotonic loading. In this study, a micromechanics‐based adaptive cohesive zone model simulating prop...
BACKGROUND Long-term potentiation (LTP), a much studied cellular model of synaptic plasticity, has not been demonstrated at synapses between primary afferent C-fibers and spinal dorsal horn (DH) neurons in mice in vivo. EphrinB-EphB receptor signaling plays important roles in synaptic connection and plasticity in the nervous system, but its role in spinal synaptic plasticity remains unclear. ...
The evolution of language has been the subject of much debate and speculation. It is difficult to study in a scientific manner and remains an open research question. This paper proposes an integrated computational framework for investigating possible scenarios of genetic and cultural evolution of language. Specifically, our framework aims to capture cultural evolution to allow for investigation...
Loss-of-function mutations in the gene encoding for the RhoGAP protein of oligophrenin-1 (OPHN1) lead to cognitive disabilities (CDs) in humans, yet the underlying mechanisms are not known. Here, we show that in mice constitutive lack of Ophn1 is associated with dysregulation of the cyclic adenosine monophosphate/phosphate kinase A (cAMP/PKA) signalling pathway in a brain-area-specific manner. ...
analytical detection of cracking in connections of steel moment resisting frames using simple damage indices is important since these cracks are not visible unless the connections are uncovered. in this paper, applicability of three cumulative damage indices for detection of cracking in a cover plate welded moment connection is investigated. the damage indices considered in this study are based...
The accuracy of a machining model depends on the capability this to describe physical phenomena associated real system. This includes material constitutive and approach used field flow in cutting. In paper, high speed (HSM) Ti6Al4V titanium alloy is developed. cutting proposed considering influence strain hardening, strain-rate, temperature, state stress (e.g., triaxiality Lode parameter) plast...
Cyclic plasticity and creep are the primary design considerations of 1 and 2 stage gas turbine blades. Directionally-solidified (DS) Ni-base materials have been developed to provide (1) greater creep ductility and (2) lower minimum creep rate in solidification direction compared to other directions. Tracking the evolution of deformation in DS structures necessitates a constitutive model having ...
This paper describes high temperature cyclic elastic-plastic testing of XN40F material for application to the life prediction of superplastic forming (SPF) tools. Cyclic plasticity material constitutive constants are identified from the high temperature tests across the range of 20C to 900C for representative predicted die conditions. These material constants are implemented within a transient,...
Phosphodiesterases (PDEs) are enzymes that break down the phosphodiesteric bond of the cyclic nucleotides, cAMP and cGMP, second messengers that regulate many biological processes. PDEs participate in the regulation of signal transduction by means of a fine regulation of cyclic nucleotides so that the response to cell stimuli is both specific and activates the correct third messengers. Several ...
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