International Journal of Non-linear Mechanics
Papers 4,754
1 page of 476 pages (4,754 results)
#1Mac Darlington Uche Onuoha (China University of Petroleum)H-Index: 5
#2Menglan Duan (China University of Petroleum)H-Index: 19
Last. Jianjun Liu (China University of Petroleum)
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Abstract null null Severe slugging in deepwater risers is a serious flow assurance problem that endangers the reliability of subsea production systems (pipelines, risers, and jumpers) by exposing them to fatigue loading, structural instability, and material damage due to its cyclic behaviour. Modelling this problem is very challenging because of its nonlinearity and the need to establish a coupled fluid–structure interaction (FSI) model that will reflect the physics of this problem. In this pape...
#1Paolo Falsaperla (University of Catania)H-Index: 12
#2Giuseppe Mulone (University of Catania)H-Index: 19
Last. Carla Perrone (University of Catania)H-Index: 2
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Abstract null null Here we study the nonlinear stability of magnetohydrodynamics plane Couette and Hartmann shear flows. We prove that the streamwise perturbations are stable for any Reynolds number. This result is in a contradiction with the numerical solutions of the Euler–Lagrange equations for a maximum energy problem. We solve this contradiction with a conjecture. Then, we rigorous prove that the least stabilizing perturbations, in the energy norm, are the spanwise perturbations and give so...
#1Carlos Castillo-Méndez (UNAM: National Autonomous University of Mexico)
#2Armando Ortiz-Prado (UNAM: National Autonomous University of Mexico)H-Index: 2
Abstract null null Fiber-reinforced biological soft tissues are often modeled as anisotropic hyperelastic materials. Four strain invariants can be used to define a strain energy function for soft tissues reinforced with a single fiber family: two isotropic invariants null null null null null null null I null null null 1 null null null , null null null I null null null 2 null null null null null null null and two anisotropic invariants null null null null null null null I null null null 4 null nu...
#1Angiolo Farina (UniFI: University of Florence)H-Index: 15
#2Lorenzo Fusi (UniFI: University of Florence)H-Index: 16
Last. Giuseppe Saccomandi (University of Perugia)H-Index: 35
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Abstract null null We consider three-dimensional nonlinear viscoelastic models that account for both stress relaxation and creep/recovery phenomena. These models are based on different frame indifferent time derivatives: the Oldroyd (or upper-convected) derivative, the Jaumann (or co-rotational) derivative and the Cotter-Rivlin (or lower-convected) derivative. Under a simple tension creep process, these constitutive equations predict the same stress relaxation but lead to different situations. T...
#1Javier Gutiérrez Álvarez (TU Delft: Delft University of Technology)H-Index: 1
#2Chiara Bisagni (TU Delft: Delft University of Technology)H-Index: 27
Abstract null null This paper presents an experimental and numerical study of composite plates, analyzing the interaction between mechanical and thermal loads related to buckling and the occurrence of mode jumping. A novel experimental setup for thermomechanical testing was developed. The setup is conceived around a frame with a low coefficient of thermal expansion, so that the plate can experience buckling and mode jumping when heated; and when compressed, interactions between the two loading s...
#1Ganesh Tamadapu (Indian Institute of Technology Madras)H-Index: 7
Abstract null null This work mainly focuses on the free swelling and inflation mechanics of a hyperelastic homogeneous and isotropic gas-filled toroidal gel balloon of an initially circular cross-section. Two compressible hyperelastic material models, namely neo-Hookean and Gent, are considered with Flory–Huggins mixing energy. Mechanics of free swelling configurations are studied using equilibrium equations obtained for incompressible and compressible axisymmetric inflation. The two-point bound...
#1Lorenzo Fusi (UniFI: University of Florence)H-Index: 16
#2Angiolo Farina (UniFI: University of Florence)H-Index: 15
Last. Luigi Vergori (University of Perugia)H-Index: 13
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Abstract null null The linear stability of channel flows driven by pressure drops is carried out for fluids that exhibit a yield stress, the mechanical response of which is prescribed by the Bingham constitutive relation or two of its regularizations: the model due to Allouche and co-workers that is usually referred to as the “simple model”, and Papanastasiou model. Despite the fact that these two regularized models provide a good approximation of the steady Poiseuille flow of a Bingham fluid, t...
#1Nikita F. Morozov (SPbU: Saint Petersburg State University)H-Index: 15
#2Dmitriy A. Indeitsev (Saint Petersburg State Polytechnic University)
Last. L. V. Shtukin (Saint Petersburg State Polytechnic University)H-Index: 4
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Abstract null null In the presented work, a model of a microelectromechanical accelerometer with two microbeam sensing elements located between two fixed electrodes is proposed. The action of the inertia forces in the longitudinal direction affects the spectral properties of the system. The dynamics of the system in the presence of a weak electrostatic coupling between the sensitive elements is characterized by the phenomenon of modal localization - a significant change in the amplitude ratios f...
Abstract null null Equivalence transformations play one of the important roles in continuum mechanics. These transformations reduce the original equations to simpler forms. One of the classes of nonlocal equivalence transformations is the class of reciprocal transformations. Despite the long history of applications of such transformations in continuum mechanics, there has been no method of obtaining them. Recently such a method was proposed. The method uses group analysis approach and consists o...
#1Felisia Angela Chiarello (Polytechnic University of Turin)H-Index: 6
#2Benedetto Piccoli (RU: Rutgers University)H-Index: 50
Last. Andrea Tosin (Polytechnic University of Turin)H-Index: 22
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We study the derivation of macroscopic traffic models from car-following vehicle dynamics by means of hydrodynamic limits of an Enskog-type kinetic description. We consider the superposition of Follow-the-Leader (FTL) interactions and relaxation towards a traffic-dependent Optimal Velocity (OV) and we show that the resulting macroscopic models depend on the relative frequency between these two microscopic processes. If FTL interactions dominate then one gets an inhomogeneous Aw-Rascle-Zhang mode...
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