نتایج جستجو برای: inelastic deformation
تعداد نتایج: 84449 فیلتر نتایج به سال:
We present atomistic simulations of the tensile and compressive loading of single crystal facecentered cubic (FCC) nanowires with h1 0 0i and h1 1 0i orientations to study the propensity of the nanowires to deform via twinning or slip. By studying the deformation characteristics of three FCC materials with disparate stacking fault energies (gold, copper and nickel), we find that the deformation...
Computational techniques, which preserve the objectivity of incremental constitutive relations, for finite elastic or inelastic materials, for finite time steps, during which the material elements may undergo finite rotations, are presented. These techniques are useful in finite deformation (finite rotations and finite strain) computational analysis of two as well as three dimensional solids an...
A compact approach based on the folding model is suggested for the determination of the isoscalar and isovector transition strengths of the low-lying (∆S = ∆T = 0) excitations induced by inelastic proton scattering measured with exotic beams. Our analysis of the recently measured inelastic O+p scattering data at Elab = 30 and 43 MeV/nucleon has given for the first time an accurate estimate of t...
Dynamic mechanical analysis was performed in two metallic glasses that show markedly distinct β relaxation features. The confined flow defects of free-volume zones and the inelastic deformation behavior result into a significant hysteresis loop dynamic cyclic loadings, which is described with viscoelastic model. Annealing below glass transition temperature T g decreases concentration zones. und...
This article deals with a viscoplastic material model of overstress type. The model is based on a multiplicative decomposition of the deformation gradient into elastic and inelastic part. An additional multiplicative decomposition of inelastic part is used to describe a nonlinear kinematic hardening of Armstrong-Frederick type. Two implicit time-stepping methods are adopted for numerical integr...
• A multiscale (MS) method to study inelastic creep deformation of rocks is developed. Effects are studied under monotone and cyclic loading. Fine-scale MS results investigated with the experimental data. It allows for quantification in subsurface at different timescales. The developments made OA https://gitlab.tudelft.nl/ADMIRE_Public/mechanics . Subsurface geological formations provide giant ...
Exploiting form invariance of a class of elastic – plastic constitutive relations for drained and undrained deformation makes it possible to compare predictions for localization under these limiting conditions. Results are shown to depend strongly on poroelastic constants reflecting the compressibility of solid and fluid constituents and parameters describing inelastic volume strain and the dep...
The mechanical properties of free-standing electron beam deposited amorphous carbon structures have been studied using atomic force microscopy. The fabricated carbon blades are found to be extraordinarily flexible, capable of undergoing vertical deflection up to ∼ 75% of their total length without inelastic deformation. The elastic bending modulus of these structures was calculated to be 28 ± 1...
Excited states in (40)Si have been established by detecting gamma rays coincident with inelastic scattering and nucleon removal reactions on a liquid hydrogen target. The low excitation energy, 986(5) keV, of the 2(1)(+) state provides evidence of a weakening in the N=28 shell closure in a neutron-rich nucleus devoid of deformation-driving proton collectivity.
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