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Showing 1 to 20 of 59 for “"Viscoelastic materials"”.
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Nonlinear viscoelastic materials : bioinspired applications and new characterization measures
Viscoelastic materials, such as biomaterials and non-Newtonian fluids, typically experience mechanical loading which evokes a nonlinear rheological response. Rheologically complex materials can provide novel functionality in biological and engineered systems. However, it is found that standard …
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A Novel Material Modulus Function for Modeling Viscoelastic Materials
… and engineers for decades. The integration of viscoelastic materials into engineering structures can reduce undesired vibrations and serve as an effective passive control mechanism. Various techniques have been developed to model viscoelastic materials. The growing popularity of finite element …
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Transient analyses of viscoelastic materials with applications to numerical models
Viscoelastic materials are present everywhere in everyday life from engineered materials like rubber and cork, to natural materials like bird feathers and human tissue. Consequently, analyzing the behavior of such materials is paramount not only to design, but to understanding the natural world. In …
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On the two-potential constitutive modelling of rubber viscoelastic materials
U of I Only Restriction Lifted for Item 93166 on 2018-07-08T09:15:36Z.
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Enabling design with rheological complexity: intuition and optimization of viscoelastic materials
… design based on rheologically complex materials. Traditionally, engineers choose hard materials or simple fluids for design. Complex materials (soft solids and non-Newtonian fluids) greatly increase the design space. Additionally, these materials add functionality (viscoelasticity, …
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Methods for the integrated design of viscoelastic materials and structural geometry
… engineers have traditionally selected simple materials, including linear elastic solids and Newtonian fluids, for their designs, and optimize designed systems within the limitations of preselected materials. However, allowing complex materials (e.g., viscoelastic materials and soft solids) as …
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Dynamic Behaviour of Composite Structures Containing Viscoelastic Materials, with Applications to Solid Fuel Rocket Motors
… attached to the aft end. The propellant is a viscoelastic material, no reliable data on the complex modulii of the propellants were available so a method was developed to measure it - the admittance method. This consists of vibrating a rod longitudinally, the applied force is kept constant the …
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Investigation on Physics-based Multi-scale Modeling of Contact, Friction, and Wear in Viscoelastic Materials with Application in Rubber Compounds
… phenomena of contact, friction, and wear in viscoelastic materials with application in rubber compounds. Tribiological properties of rubber compounds are important for many applications such as tires, shoe heels and soles, wiper blades, artificial joints, O-ring seals, and so on. In all these …
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Optimal distribution of the relaxation behavior of linear viscoelastic materials by the particle swarm optimization method applied to the problem of a twisting shaft
… of the relaxation behavior of linear viscoelastic materials was proposed. The motivation of this research is to outline a mathematical/computational framework for the material distribution optimization problem of a linear viscoelastic material. The distribution of the relaxation …
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Numerical methods for fractional differential equations by new caputo and hadamard types operators
… a model describing the behavior of classical viscoelastic materials, electromagnetic system and viscoelastic materials. Furthermore, associated integral for Caputo�Fabrizio operator is also presented using Laplace transform and Inverse Laplace transform. Hence, we first introduce …
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Modeling of Shock Wave Propagation and Attenuation in Viscoelastic Structures
… shock accelerometers to spacecraft. High-damping viscoelastic materials are employed in the design of geometrically complex impact absorbent components. Since shock transients have a broadband frequency spectrum, it is imperative to properly model frequency dependence of material parameters. The …
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Applications of the Optical Method of Caustics to the Study of Viscoelastic Dynamic Fracture and Static Blunt Crack Fronts
… and caustics, are extended to linearly viscoelastic materials. The Maxwell-Neumann relation for the stress-optic constants, which is good for linearly elastic behavior, is replaced by an expression derived from the Clausius-Mosotti-Lorentz-Lorenz (CMLL) equation. The opto-mechanical …
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Design tools for linear viscoelastic fluids
… design often makes use of conventional materials such as hard, elastic solids and simple, Newtonian fluids. Rheologically-complex materials (non-Newtonian fluids and soft solids) demonstrate useful and novel properties in both engineered and biological systems. Incorporating these …
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Implementation of viscoelastic Hopkinson bars
The properties of soft, viscoelastic materials at high strain rates are important in furthering our understanding of their role during blast or impact events. Testing these soft or low impedance materials using metallic bars in a split Hopkinson pressure bar setup, poor signal to noise ratios and …
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Adaptive finite elements for viscoelastic deformation problems
… of generating solutions to problems involving materials with fading memory, known as viscoelastic materials. Viscoelastic materials can be loosely described as those whose current stress configuration depends on their recent past. Viscoelastic constitutive laws for stress typically take the …
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Direct Computations of Spatially Resolved Viscoelastic Moduli of Biomolecular Condensates
<p>Biomolecular condensates are viscoelastic materials formed by liquid-liquid phase separations (LLPS) of biopolymers. In this study, we develop a modified graph Laplacian-based collective model to characterize viscoelastic heterogeneity within condensates based on results of lattice-based …
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Multiscale probing of colloidal gelation dynamics
Colloidal gels are viscoelastic materials characterized by the collective behavior of particles that form a space-spanning network. Although the network structure embodies the aggregation process of the particles, the kinetic pathway from a stable suspension to such a complex microstructure remains …
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Asymptotically nonliner oscillatory shear: theory, modeling, measurements and applications of nonlinear elasticity to stimuli-responsive composites
Viscoelastic materials, such as crosslinked networks of synthetic and biological polymers, exhibit a nonlinear rheological response to mechanical deformation. Oscillatory shear is a popular deformation protocol for viscoelastic characterization, both linear and nonlinear, the latter referred to as …
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Radiation and temperature effects on the time-dependent response of T300/934 graphite/epoxy
… model was also developed to predict the viscoelastic response of fiber reinforced composite materials. The model was shown to correlate well with experimental results for linearly viscoelastic materials with relatively small creep strains.
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