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Showing 1 to 11 of 11 for “"Large-Amplitude Oscillatory Shear (LAOS)"”.
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Development, characterization and applications of magnetorheological fluid based "smart" materials on the macro-to-micro scale
… class of field-responsive fluids that undergo large, reversible and fast changes in their rheological properties when acted upon by an external magnetic field. 'Smart' or controllable composite materials have been obtained by doping polymers, foams, fabrics etc. with these field-responsive …
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Nonlinear viscoelastic materials : bioinspired applications and new characterization measures
… characterizing nonlinear viscoelasticity using large amplitude oscillatory shear (LAOS) deformation. The LAOS protocol spans the 2D parameter space of deformation amplitude and frequency, known as a Pipkin space. Physically meaningful material measures are proposed, corresponding to clearly …
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Rheology of complex fluid films for biological and mechanical adhesive locomotion
… mucus, and their acrobatic ability is due in large part to the theological properties of this slime. The primary application of the present research is to enable a mechanical crawler to climb walls and walk across ceilings using adhesive locomotion. A properly selected slime simulant will …
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Rheometry and direct flow observations of a model wax-oil system
… using temperature sweeps and stress sweeps. Large amplitude oscillatory shear (LAOS) is also used to gain additional insight into the rheology of the model system. The results from the LAOS measurements show that the wax-oil system exhibits a strain stiffening and shear thinning response …
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Thixotropic-viscoelastic rheological fingerprints in large amplitude oscillatory shear
In this work we demonstrate the use of large-amplitude oscillatory shear (LAOS) as a tool to characterize the behavior of constitutive models that exhibit both thixotropic and viscoelastic phenomena. We demonstrate this use of LAOS by first examining the strain controlled LAOS (LAOStrain) response …
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Asymptotically nonliner oscillatory shear: theory, modeling, measurements and applications of nonlinear elasticity to stimuli-responsive composites
… rheological response to mechanical deformation. Oscillatory shear is a popular deformation protocol for viscoelastic characterization, both linear and nonlinear, the latter referred to as large amplitude oscillatory shear (LAOS). However, the accompanying nonlinear material response in LAOS is …
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The yielding transition in soft materials
… metallization pastes and polymer microgels under large amplitude oscillatory shear (LAOS) by means of the sequence of physical processes (SPP) framework. The SPP approach allows insights to be gained regarding these processes on time scales significantly faster than the period of oscillation, with …
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Low dimensional intrinsic material functions uniquely identify rheological constitutive models and infer material microstructure
Made available in DSpace on 2013-02-03T19:18:23Z (GMT). No. of bitstreams: 2 Narayanan Ashwin Kumar_Bharadwaj.pdf: 5317555 bytes, checksum: 8997d27d51481208eef06a2a2f9726e6 (MD5) license.txt: 4082 bytes, checksum: 4d805d5496639ba3959b750fb2fc8438 (MD5)
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Time-resolved linear and non-linear rheology of thixotropic and aging complex fluids: Application to particulate and biopolymeric physical gels
… of microstructure is commonly both time– and shear-rate (or shear-stress)–dependent resulting in a range of complex phenomena collected under the term thixotropy. It is becoming increasingly im- portant to develop time-resolved rheometric techniques to quantify the behavior of mutating …
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Structure-property relationships in polymeric materials via advanced rheological and neutron scattering techniques
… when reacting to dynamic flows such as large-amplitude oscillatory shear (LAOS) flows, tend to generate complex material responses. Several analysis approaches have been suggested to interpret the underlying material physics. Despite recent progress in understanding the macroscopic …
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Gel Development Using Cellulose Nanocrystals
… (TEM). The CNC-based gel behavior under large amplitude strains is also characterized by non-linear rheology. The gel collapse behavior and the self-healing dynamics of CNC-based gels are also quantified using fluorescence recovery after photobleaching (FRAP) analysis. It is shown that …