Searched for: subject%3A%22Moduli%22
(1 - 17 of 17)
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Shakeel, A. (author), Zander, F. (author), de Klerk, Jan‑Willem (author), Kirichek, Alex (author), Gebert, J. (author), Chassagne, C. (author)
Purpose<br/>The presence of organic matter in cohesive sediment results in the formation of clay-organic flocs, which eventually impart complex rheological behavior including shear-thinning, viscoelasticity, thixotropy and two-step yielding to mud. In this study, the influence of microbial degradation of sediment organic matter on the...
journal article 2022
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Shakeel, A. (author), Chassagne, C. (author), Bornholdt, Jasper (author), Ohle, Nino (author), Kirichek, Alex (author)
The nautical bottom (i.e., the level at which contact with a ship’s keel causes either damage or unacceptable effects on controllability and manoeuvrability of a ship) should be associated to a measurable physical characteristic. Bulk density is typically used as a criterion for nautical bottom by many ports worldwide. However, the rheological...
journal article 2022
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Shakeel, A. (author), Kirichek, Alex (author), Chassagne, C. (author)
Kaolinite suspensions are known to have quite fast settling behaviour and Newtonian character, particularly at low concentrations, due to the non-swelling nature of their constitutive particles. On the other hand, bentonite is known for its swelling and interacting nature, which leads to the formation of a network structure, even at low...
journal article 2021
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Shakeel, A. (author), Kirichek, Alex (author), Chassagne, C. (author)
Mud, a cohesive material, consists of water, clay minerals, sand, silt and small quantities of organic matter (i.e., biopolymers). Amongst the different mud layers formed by human or natural activities, the fluid mud layer found on top of all the others is quite important from navigational point of view in ports and waterways. Rheological...
book chapter 2021
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Diez, T. (author), Rudolph, Gerd (author)
Local normal form theorems for smooth equivariant maps between infinite-dimensional manifolds are established. These normal form results are new even in finite dimensions. The proof is inspired by the Lyapunov–Schmidt reduction for dynamical systems and by the Kuranishi method for moduli spaces. It uses a slice theorem for Fréchet manifolds...
journal article 2021
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Shakeel, A. (author), MacIver, Michael R. (author), van Kan, Paul J.M. (author), Kirichek, Alex (author), Chassagne, C. (author)
Natural fine-grained suspensions usually exhibit a complex rheological fingerprint – in particular a two-step yielding phenomenon – due to the presence of mineral clay particles and organic matter (often found in a flocculated state). These rheological properties may vary considerably from one location to another due to the differences in mud...
journal article 2021
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Shakeel, A. (author), Kirichek, Alex (author), Chassagne, C. (author)
Natural mud usually exhibits non-Newtonian rheological behaviors like viscoelasticity, thixotropy and yield stress. The history of each mud sample is also an important factor influencing the rheological behavior, as the state of the clay fabric – for a same composition – is dependent on the shear stresses experienced previously by the sample....
journal article 2020
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Shakeel, A. (author), Kirichek, Alex (author), Chassagne, C. (author)
Purpose: An innovative way to define navigable fluid mud layers is to make use of their rheological properties, in particular their yield stress. In order to help the development of in situ measurement techniques, it is essential that the key rheological parameters are estimated beforehand. Is there only one yield stress? In which shear rate...
journal article 2019
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Hinkofer, Thomas (author)
With an increased demand for renewable energy sources, geothermal developments have moved into the spotlight, including sedimentary structures. In the western part of the Netherlands, cretaceous sandstone bodies are already in use for the geothermal energy production. However, these reservoirs are generally producing water at temperatures less...
master thesis 2017
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Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
The electrostatic instability (pull-in) of a flat electrode in a parallel plate capacitor has been shown to be highly sensitive to external mechanical loads such as pressure. In this paper, we substantiate the possibility of prompting additional unstable configurations in such a system, with a remarkable sensitivity to the applied pressure....
journal article 2017
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Sajadi, B. (author), Alijani, F. (author), Davidovikj, D. (author), Goosen, J.F.L. (author), Steeneken, P.G. (author), van Keulen, A. (author)
In the last decade, graphene membranes have drawn tremendous attention due to their potential application in Nano-Electro-Mechanical Systems. In this paper, we show that the frequency response curves of graphene resonators are powerful tools for their dynamic characterization and for extracting their equivalent Young's modulus. For this purpose,...
journal article 2017
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Hedayati, R. (author), Leeflang, M.A. (author), Zadpoor, A.A. (author)
Mechanical metamaterials exhibit unusual mechanical properties that originate from their topological design. Pentamode metamaterials are particularly interesting because they could be designed to possess any thermodynamically admissible elasticity tensor. In this study, we additively manufacture the metallic pentamode metamaterials from a...
journal article 2017
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Vogelaar, B. (author), Smeulders, D.M.J. (author), Harris, J. (author)
Seismic effects of a partially gas-saturated subsurface have been known for many years. For example, patches of nonuniform saturation occur at the gas-oil and gas-water contacts in hydrocarbon reservoirs. Open-pore boundary conditions are applied to the quasi-static Biot equations of poroelasticity to derive an exact analytic expression of the...
journal article 2010
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Van der Ven, A. (author), Garikipati, K. (author), Kim, S. (author), Wagemaker, M. (author)
We investigate the role of coherency strains on the thermodynamics of two-phase coexistence during Li (de)intercalation of LixFePO4. We explicitly account for the anisotropy of the elastic moduli and analytically derive coupled chemical and mechanical equilibrium criteria for two-phase morphologies observed experimentally. Coherent two-phase...
journal article 2009
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Jardani, A. (author), Revil, A. (author), Slob, E.C. (author), Söllner, W. (author)
The interpretation of seismoelectrical signals is a difficult task because coseismic and seismoelectric converted signals are recorded simultaneously and the seismoelectric conversions are typically several orders of magnitude smaller than the coseismic electrical signals. The seismic and seismoelectric signals are modeled using a finite-element...
journal article 2009
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Chao, G.E. (author), Smeulders, D.M.J. (author), Van Dongen, M.E.H. (author)
We present an exact theory of attenuation and dispersion of borehole Stoneley waves propagating along porous rocks containing spherical gas bubbles by using the Biot theory. An effective frequency-dependent fluid bulk modulus is introduced to describe the dynamic (oscillatory) behavior of the gas bubbles. The model includes viscous, thermal, and...
journal article 2007
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De Borst, R. (author), Peeters, P.P.J.M. (author)
journal article 1989
Searched for: subject%3A%22Moduli%22
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