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Payne effect
The Payne effect is a particular feature of the stress–strain behaviour of rubber, especially rubber compounds containing fillers such as carbon black. It is named after the British rubber scientist A. R. Payne, who made extensive studies of the effect (e.g., Payne 1962). The effect is sometimes also known as the Fletcher-Gent effect, after the authors of the first study of the phenomenon (Fletcher & …
payne
In that region where the storage modulus decreases the loss modulus shows a maximum. The Payne effect depends on the filler content of the material and vanishes for unfilled elastomers. Physically, the Payne effect can be attributed to deformation-induced changes in the material''s microstructure, i.e. to breakage and recovery of weak physical bonds …
Rheological Properties of Polyurethane-Based …
As shown in Figure 6A, in the absence of an external magnetic flux density, storage modulus decreases rapidly along shear strain amplitude and then tends to stabilize beyond certain strain. It can be concluded that the ability of energy storage for PU matrix decreases with the increase of shear strain amplitude.
Physiochemical and mechanical characterisation of orthodontic …
At Tg, storage modulus decreases rapidly, where the polymer starts to shift to the rubbery state (Zin et al., 2019). In this context, the results of the ongoing DMA analysis may become clearer, particularly with regard to the significant discrepancies in storage modulus observed between 20 °C and 45 °C for the TC-85 material, whose Tg is …
Storage modulus (a) and loss factor (b) master curves of sample …
Download scientific diagram | Storage modulus (a) and loss factor (b) master curves of sample A for various strain amplitudes (×, 0.2;, 0.5;, 0.7;, 1.4%) referred to a reference temperature of ...
Restructuring and aging in a capillary suspension
At low deformations, the storage modulus increases and the loss modulus decreases in time. As the deformation amplitude is increased slightly, the storage modulus begins to increase with a similar slope as for the lowest deformation, but then at some critical time, it suddenly decreases and never fully recovers.
【】payne
The effect is observed under cyclic loading conditions with small strain amplitudes, and is manifest as a dependence of the viscoelastic storage modulus on the amplitude of the applied strain. Above approximately 0.1% strain amplitude, the storage modulus …
Theoretical and experimental research on the mechanical …
With increasing loading frequency, the storage modulus initially increases, reaches a minimum value at 1 Hz, and then rapidly decreases, reaching another minimum value at 4 Hz. For example, at a shear strain amplitude of 60% and a magnetic induction intensity of 1,000 mT, the storage modulus of the MRE material is 387.5 kPa …
Normalised bond strength and storage modulus versus …
A local minimum can be seen between 100 • C and 200 • C, followed by a local maximum around 300 • C, above which the strength starts to decrease rapidly. The local minimum around 100 • C ...
Photopolymerization Parameters Influence Mechanical, Microstructural, and Cell Loading Properties of Rapidly …
The modulus plateau point was recorded as the time (t 90%) and modulus (G′ 90%) value where the shear storage modulus reached 90% of G′ ∞ (). Furthermore, as a proxy for the cross-linking rate, the slope of the shear storage modulus (d G ′/d t ) was calculated using the central difference method.
Shape memory mechanical metamaterials
storage modulus decreases rapidly with increasing temperature. At low temperature T l, since material 2 is much stiffer than material 1, the supporting segment provides fully clamped boundary conditions and the original concave building block B 0 …
【】payne
The effect is observed under cyclic loading conditions with small strain amplitudes, and is manifest as a dependence of the viscoelastic storage modulus on the amplitude of the applied strain. Above approximately 0.1% strain amplitude, the storage modulus decreases rapidly with increasing amplitude.
A rapidly responsive, controllable, and reversible photo-thermal …
The swelling of DN-SA causes the elasticity of the material to decrease, which is reflected in the reduction of the storage modulus of the DN-SA hydrogel. Besides, we found that the pH of ammonium molybdate solution is slightly greater than 7, which may cause partial detangling in the DN-SA chain and may destroy some chemical crosslinking …
Effect of rheological properties of friction-enhancing greases on …
It can be seen from Fig. 4 (a) that the storage modulus, the loss modulus and the complex modulus decrease rapidly as the strain increases, and then tend to be constant starting at a strain of 200%. The phase angle increases rapidly with the increase of strain and then tends to be constant beyond a strain of 400%.
Modelling viscoelastic materials whose storage modulus is …
On the one hand, it should be noted that both, exponential and hyperbolic models, possess real and imaginary parts of complex modulus dependent on frequency. On the other hand, the storage modulus and loss factor of the former, shown in Fig. 1, approximates the typical shape that viscoelastic materials present in rubbery, transition …
Storage Modulus
The storage modulus generally increases with increase in the percentage of secondary constituent (polymer as blend, fillers/reinforcement to make composite), while it …
Decoupling between calorimetric and dynamical glass transitions …
As the temperature increases above T g, the viscosity decreases rapidly. While, the viscosity of LaCe-HEMG is obviously higher than the others, suggesting the …
The relationship between the storage modulus of each hydrogel …
However, hydrogels self-assembled from such materials are physiologically unstable and rapidly enzymatically decomposed, mainly due to the lack of molecular rigidity (Eskandari et al., 2017).
Glass transition in a marginal glass-forming alloy studied by …
The storage modulus monotonically decreases due to the thermal softening as the temperature increases up to ∼379 K, at which point the slope of the …
Strain amplitude denpendence of the storage and loss moduolus …
From figure 6(a) and 6(b), the critical shear strain from LVE range (storage modulus, G'', nearly independent of the shear strain ( Hyun et al., 2002)) to NLVE range (storage modulus rapidly ...
Rheology and UV protection properties of suspensions of fine titanium dioxides …
The suspensions are regarded as liquids, because the storage modulus decreases rapidly in the low-frequency region. The suspension rheology is strongly associated with flocculated structures that are primarily controlled by …
(a) Storage modulus and loss modulus with increasing …
The cause for decrease in the storage modulus is due to rise in the pores and voids created at the interface (Anantharaman et al., 2015), (Hazeli et al., 2014).
Storage Modulus
Similar to pure epoxy, the storage modulus of epoxy asphalt gradually decreases with increasing temperature. As the temperature rises, the modulus drops rapidly, indicating …
Improved damping behavior of squeeze-cast AZ91-Ca-Sb …
Storage modulus increases and loss modulus decreases with an increase in frequency. Abstract The damping behavior of the SiC np reinforced AZ91 + 2.0Ca+ 0.3Sb (wt%) alloy in the temperature range of 25–350 °C and at frequencies of 1, 5, and 10 Hz has been evaluated.
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In that region where the storage modulus decreases the loss modulus shows a maximum. The Payne effect depends on the filler content of the material and vanishes for unfilled elastomers. Physically, the Payne effect can be attributed to deformation-induced changes in the material''s microstructure, i.e. to breakage and recovery of weak physical bonds …
a Amplitude dependence of the storage modulus of …
With increasing strain, a successive breakdown of the filler network takes place and the elastic modulus decreases rapidly if a crit- ical strain amplitude is exceeded (Fig. 42).
Curves of storage and loss modulus of MRE with strain amplitude: a storage modulus; b loss modulus …
Figure 4 shows the variation curves of storage modulus and loss modulus of the MRE samples with strain amplitude when the magnetic induction intensity is 234 mT. ... View in full-text. Context 2 ...
Effects of fused deposition modeling process parameters on tensile, dynamic mechanical properties of …
The storage modulus, loss modulus and loss factor of the material first increase and then decrease with the increase of the nozzle temperature, and reach the maximum at about 215 C. Compared with the effect of nozzle temperature on the elastic modulus and tensile strength, the dynamic mechanical properties of the FDM-printed …
4.8: Storage and Loss Modulus
4.8: Storage and Loss Modulus. Page ID. Chris Schaller. College of Saint Benedict/Saint John''s University. We saw earlier that the inherent stiffness of a material can be assessed by its Young''s modulus. The Young''s modulus is the ratio of the stress-induced in a material under an applied strain. The strain is the amount of deformation in the ...
11.5.4.8: Storage and Loss Modulus
The slope of the loading curve, analogous to Young''s modulus in a tensile testing experiment, is called the storage modulus, E''. The storage modulus is a measure of …
Properties of Graphene Oxide/Epoxy Resin Composites
Figure 3 gives the relationship between the temperature and the storage modulus of graphene oxide/epoxy resin composites. It can be seen from Figure 3 that low temperature zone corresponds to the glassy state of the polymer, so the storage modulus is very high at this region and decreases slowly with the increase of the …
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