We present an experimental investigation of fracture in self-assembled gold nanoparticle mono- and multilayers attached to elastomer substrates and subjected to tensile stress. Imaging the fracture patterns down to the scale of single particles provides detailed information about the crack width distribution and allows us to compare the scaling of the average crack spacing as a function of stra...

In magnetic resonance imaging (MRI), image intensity inhomogeneity hampers the quantitative analysis, e.g. segmentation or registration. Intensity inhomogeneity is an effect perceived as a smooth variation in intensities across the image. This study provides an efficient, fully automated intensity inhomogeneity correction method that makes no a priori assumptions on the image intensity distribu...

The plastic stability and ductile rupture under evolution of cavity-damage and local strength inhomogeneities are examined theoretically for uniaxial tension. Analytical solutions are derived for that arbitrary strain-induced formations modified to stress-triaxiality evolution during necking. With increasing rate of damage formation necking is enhanced and ductility as well as load drop reduces...

Background Prediction of ventricular arrhythmias (VA) after myocardial infarction remains challenging. There has been evidence that strain echocardiography can improve risk prediction. Patients with a high degree of contraction inhomogeneity are thought to be at increased risk of arrhythmic events. Mechanical dispersion may be due to inhomogeneous electrical activation and the resulting dyssync...

Single-layer graphene microislands with smooth edges and no visible grain boundary were epitaxially grown on the C-face of 4H-SiC and then characterized at the nanoscale using tip-enhanced Raman spectroscopy (TERS). Although these graphene islands appear highly homogeneous in micro-Raman imaging, TERS reveals the nanoscale strain variation caused by ridge nanostructures. A G' band position shif...

introduction polymer gel dosimeters offer a practical solution to 3d dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. in this study, egsnrc calculated and pagat polymer gel dosimeter measured dose profiles from single shot irradiation with 18 mm collimator of gamma knife in homogeneous and inhomogeneous phantoms were compared with eac...

Abstract: In this paper, a systematic numerical simulation was performed to elucidate the damage mechanisms in bulk metallic glasses (BMGs) subjected to the tension-compression cyclic loading, and then the relation between fatigue life, applied strain, and cycling frequency was therefore presented. The free volume was selected as an internal state variable to depict the shear-band nucleation, g...

First-principles calculations based on density functional theory are performed on graphene/BN and BN bilayers to investigate the effect of the strain on their energy gaps. For the graphene/BN bilayer, the bands have characteristic graphenelike features with a small band gap at K. Application of strain modulates the band gap, whose magnitude depends on the strength of interaction between constit...

The chemical homogeneity of single phase high-entropy AlB2-type Ti-Zr-Hf-Ta-TM diboride (TM = Cr, V, W, Mo), as well Ti-Zr-Hf-Mo-W solid solutions was investigated using a new method based on the comparative examination information provided by electron microscopy and structural parameters. study densification behavior accomplished, strong correlations among rate-grain coarsening-long range rand...

Abstract This study explores the influence of thermo-mechanical behavior and microstructure on recovery recrystallization in single-crystal superalloys during casting subsequent solution heat treatment, using miniature testing. Here, temporal evolution resistance was measured situ electrothermal mechanical testing (ETMT) to track process (RX). It found that is dominant only when incomplete depe...