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We study a class of fourth-order quasilinear degenerate parabolic equations under both time-and space-dependent and time-and space-independent forces, modeling non-Newtonian thin-film flow over a solid surface in the "complete wetting"…

偏微分方程分析 · 数学 2026-01-06 Jinhong Zhao , Bin Guo

Crack-tip fields within a transversely isotropic strain-limiting elastic body are investigated under the influence of piecewise linear slope boundary loads. The mechanical response is characterized via a nonlinear constitutive framework…

综合数学 · 数学 2026-04-30 S. M. Mallikarjunaiah , Saugata Ghosh , Dambaru Bhatta

Using mode-coupling theory, we derive a constitutive equation for the nonlinear rheology of dense colloidal suspensions under arbitrary time-dependent homogeneous flow. Generalizing previous results for simple shear, this allows the full…

软凝聚态物质 · 物理学 2009-11-13 J. M. Brader , M. E. Cates , M. Fuchs

In this paper, we study the preferential stiffness and the crack-tip fields for an elastic porous solid of which material properties are dependent upon the density. Such a description is necessary to describe the failure that can be caused…

数值分析 · 数学 2022-12-19 Hyun C. Yoon , S. M. Mallikarjunaiah , Dambaru Bhatta

Vanishing of the Fefferman-Graham obstruction tensor was used by Andersson and Chru{\'s}ciel to show stability of the asymptotically de Sitter spaces in even dimensions. However, existing proofs of hyperbolicity of this equation contain…

广义相对论与量子宇宙学 · 物理学 2022-03-02 Wojciech Kamiński

The microscopic definition for the Cauchy stress tensor has been examined in the past from many different perspectives. This has led to different expressions for the stress tensor and consequently the "correct" definition has been a subject…

数学物理 · 物理学 2010-08-31 Nikhil Chandra Admal , Ellad B. Tadmor

Usual introductions of the concept of motion are not well adapted to a subsequent, strictly tensorial, theory of elasticity. The consideration of arbitrary coordinate systems for the representation of both, the points in the laboratory, and…

材料科学 · 物理学 2009-07-18 Albert Tarantola

In this paper we propose a new method to stabilise non-symmetric indefinite problems. The idea is to solve a forward and an adjoint problem simultaneously using a suitable stabilised finite element method. Both stabilisation of the element…

数值分析 · 数学 2013-08-05 Erik Burman

We develop the analysis of finite element approximations of implicit power-law-like models for viscous incompressible fluids. The Cauchy stress and the symmetric part of the velocity gradient in the class of models under consideration are…

数值分析 · 数学 2013-10-30 Lars Diening , Christian Kreuzer , Endre Süli

This paper presents a comprehensive computational framework for investigating thermo-elastic fracture in transversely isotropic materials, where classical linear elasticity fails to predict physically realistic behavior near stress…

数值分析 · 数学 2025-10-08 Saugata Ghosh , Dambaru Bhatta , S. M. Mallikarjunaiah

We present the foundations of a projective geometric theory of elasticity, as well as outline a few possible application possibilities. We give the description of the Cauchy stress and infinitesimal strain tensors compatible with coordinate…

经典物理 · 物理学 2024-06-12 Tamás Baranyai

We study the stochastic homogenization for a Cauchy problem for a first-order Hamilton-Jacobi equation whose operator is not coercive w.r.t. the gradient variable. We look at Hamiltonians like $H(x,\sigma(x)p,\omega)$ where $\sigma(x)$ is a…

偏微分方程分析 · 数学 2017-07-04 Nicolas Dirr , Federica Dragoni , Paola Mannucci , Claudio Marchi

Positive definiteness and symmetry of the constitutive tensors describing a second-gradient elastic (SGE) material, which is energetically equivalent to a hexagonal planar lattice made up of axially deformable bars, are analyzed by…

经典物理 · 物理学 2019-08-06 G. Rizzi , F. Dal Corso , D. Veber , D. Bigoni

The regularized expectation value of the stress-energy tensor for a massless bosonic or fermionic field in 1+1 dimensions is calculated explicitly for the instantaneous vacuum relative to any Cauchy surface (here a spacelike curve) in terms…

广义相对论与量子宇宙学 · 物理学 2009-10-28 Don N. Page

In this article, we extend the capstan equation to non-circular geometries. We derive a closed form solution for a membrane with a zero Poisson's ratio (or a string with an arbitrary Poisson's ratio) supported by a rigid prism (at…

经典物理 · 物理学 2023-09-06 Kavinda Jayawardana

Irving and Kirkwood formulism (IK formulism) provides a way to compute continuum mechanics quantities at certain location in terms of molecular variables. To make the approach more practical in computer simulation, Hardy proposed to use a…

计算物理 · 物理学 2014-11-11 Jerry Zhijian Yang , Shukai Du

It is shown that second-order homogenization of a Cauchy-elastic dilute suspension of randomly distributed inclusions yields an equivalent second gradient (Mindlin) elastic material. This result is valid for both plane and three-dimensional…

数学物理 · 物理学 2014-01-03 Bacca Mattia , Bigoni Davide , Dal Corso Francesco , Veber Daniele

We prove the local in time existence of the classical solutions to the system of equations of isothermal viscoelasticity with clamped boundary conditions. We deal with a general form of viscous stress tensor $\mathcal{Z}(F,\dot F)$,…

偏微分方程分析 · 数学 2012-09-26 Marta Lewicka , Piotr B. Mucha

A new microscopic derivation of the elastic constants of amorphous solids is presented within the framework of nonaffine lattice dynamics, which makes use of a perturbative form of the low-frequency eigenvectors of the dynamical matrix…

软凝聚态物质 · 物理学 2024-08-06 Bingyu Cui , Giancarlo Ruocco , Alessio Zaccone

In this work, we investigate the Cauchy problem for the spatially inhomogeneous non-cutoff Kac equation. If the initial datum belongs to the spatially critical Besov space, we can prove the well-posedness of weak solution under a…

偏微分方程分析 · 数学 2019-02-19 Hongmei Cao , Hao-Guang Li , Chao-Jiang Xu , Jiang Xu