Article
Chemistry, Physical
Claudio Giorgi, Angelo Morro
Summary: This paper presents a general scheme for viscoelastic materials, introducing entropy production as a constitutive function to expand the range of models. The scheme allows for obtaining nonlinear models of thermo-viscoelastic materials subject to large deformations, including various special cases of viscoelastic and heat conduction models.
Article
Mechanics
Maziyar Jalaal, Boris Stoeber, Neil J. Balmforth
Summary: This study examines the spreading of a droplet of yield-stress fluid over a thin film of the same material, presenting scaling laws for the final radius and conducting numerical simulations and experiments to validate the theoretical model.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Jesse J. Taylor-West, Andrew J. Hogg
Summary: In this study, the flow of non-Newtonian fluids in corners is investigated using both numerical and analytical methods. The results show that, under certain conditions, viscoplastic materials can exhibit eddies similar to those found in Newtonian fluids.
JOURNAL OF FLUID MECHANICS
(2022)
Review
Materials Science, Multidisciplinary
Magdalena Osial, Agnieszka Pregowska, Magdalena Warczak, Michael Giersig
Summary: Magnetorheological fluids (MRFs) are intelligent materials that can modify their rheological and mechanical properties with an external magnetic field. They are used in technology to create adaptive devices and suppress vibrations in mechanical systems. In this paper, we discuss previous research on MRF properties, focusing on flow, yield strength, and viscoelastic behavior. We also explore continuum and discrete modeling and highlight the importance of accurate and efficient models for understanding and predicting MRF behavior.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Tristan Seidlhofer, Ulrich Hirn, Stephan Teichtmeister, Manfred H. Ulz
Summary: This paper proposes a mechanical model that captures the transient behavior of paper during interaction with water. The model is derived in a thermodynamically consistent manner and is validated through experiments on paper curl. It provides further insights into complex multi-physics problems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Mechanics
A. Ahmadi, H. Olleik, I Karimfazli
Summary: Our study investigates the adequacy of viscoplastic models in describing the Rayleigh-Benard convection of yield stress fluids through numerical simulations. We found that the ratio of yield stress and buoyancy stress significantly affects momentum transfer in natural convection flows. Experimental observations of flow development do not necessarily contradict theoretical predictions based on viscoplastic models, but the estimates challenge the predicted stabilizing effect of yield stress.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2022)
Article
Mechanics
Mohamed Haddad, Issam Doghri, Olivier Pierard
Summary: This paper focuses on micromechanical modeling of polymer composites with viscoelastic-viscoplastic constituents. Two mean-field homogenization models based on different theoretical approaches are extended and evaluated. The incremental-secant method and integral affine method are proposed, the former being simpler but the latter showing better accuracy.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Geological
Zhi Yong Ai, Jun Tao Yuan, Yong Zhi Zhao, Ye Cheng Dai
Summary: This paper proposes an incremental three-dimensional Nishihara model to describe the stress-strain relationship of soft soils, and verifies the effectiveness of the model through experimental data comparison.
ENGINEERING GEOLOGY
(2022)
Article
Mechanics
Vatsal Sanjay, Detlef Lohse, Maziyar Jalaal
Summary: In this study, the phenomenon of a rising bubble reaching the liquid-air interface in a yield-stress fluid was numerically investigated. Viscoplasticity was found to play a significant role in controlling the fate of capillary waves and their interaction at the bottom of the cavity, with the free surface converging to a non-flat equilibrium shape once the driving stresses fell below the yield stress. The dynamics and energy budgets of the flow were discussed, leading to the establishment of a regime map with four main regimes exhibiting different characteristic behaviors.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Mechanical
Makoto Uchida, Kouhei Kamimura, Toyoshi Yoshida, Yoshihisa Kaneko
Summary: This study investigates the strain rate- and temperature-dependent nonlinear mechanical behavior of glassy polymers using experimental and numerical methods. The effects of strain rate and temperature on the mechanical responses and strain field development of epoxy are evaluated experimentally. The study extends the transient network (TN) theory to represent the temperature- and strain rate-dependent mechanical behavior of the glassy polymer, showing consistent results with experimental data.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Mechanics
S. Akbari, S. M. Taghavi
Summary: In this study, the injection of a viscoplastic fluid into a quiescent Newtonian medium is investigated experimentally, highlighting the different flow patterns and the effects of governing dimensionless numbers. The research focuses on analyzing detailed flow features and sub-regimes, presenting results versus key dimensionless numbers for application in oil and gas well processes and 3D printing technologies.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2022)
Editorial Material
Chemistry, Physical
Abigail Rendos, Ran Li, Stephanie Woodman, Xi Ling, Keith A. Brown
Summary: The addition of highly anisotropic alpha-Ni(OH)(2) 2D sheets to magnetorheological fluids can increase saturation pressure but may weaken the fluid's performance in shear-mode rheology. This study highlights the complex interaction between particles in smart fluids and the potential for using anisotropy to manipulate this interaction.
Article
Chemistry, Physical
Abigail Rendos, Ran Li, Stephanie Woodman, Xi Ling, Keith A. Brown
Summary: Magnetorheological fluids are suspensions of magnetic particles that solidify in a magnetic field. Adding highly anisotropic 2D sheets can increase saturation pressure of the fluid, but may also weaken its performance. By modifying fluid models, the effects of additives on the behavior of magnetorheological fluids were explored.
Article
Mechanics
Jesse J. J. Taylor-West, Andrew J. J. Hogg
Summary: The motion of viscoplastic fluid between two rigid plates generates self-similar flow fields due to the absence of inertia. The strain rate is proportional to the angular velocity of the plates and the deviatoric stresses are only dependent on the polar angle and a dimensionless measure of the yield stress. There are unyielded regions adjacent to the boundaries for large angles between the plates, and viscoplastic boundary layers can form when the yield stress is large.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Polymer Science
Stefania Nardecchia, Ana Jimenez, Jose R. Morillas, Juan de Vicente
Summary: Self-healing magnetic hydrogels with anisotropic characteristics were fabricated by starting with a suspension of magnetic particles in a polysaccharide solution and utilizing a Schiff's base reaction. The structuration of magnetic particles and mechanical properties of the material were significantly influenced by the external magnetic field strength. The potential applications of these magnetic hydrogels in biomedicine include manufacturing more complex 3D materials with multidimensional platforms.
Article
Engineering, Mechanical
Masih Nasirshoaibi, Nader Mohammadi, Mehrdad Nasirshoaibi
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2017)
Article
Materials Science, Ceramics
Sadeq Malakooti, Habel Gitogo Churu, Alison Lee, Tingge Xu, Huiyang Luo, Ning Xiang, Chariklia Sotiriou-Leventis, Nicholas Leventis, Hongbing Lu
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2017)
Article
Engineering, Mechanical
Nader Mohammadi, Nasrin Kamalian, Mehrdad Nasirshoaibi, Rambod Rastegari
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2017)
Article
Engineering, Biomedical
Nader Mohammadi, Mehrdad Nasirshoaibi
JOURNAL OF VIBROENGINEERING
(2017)
Article
Mechanics
N. Mohammadi, M. Fakharzadeh
Article
Instruments & Instrumentation
Vahid A. Maleki, Nader Mohammadi
SMART MATERIALS AND STRUCTURES
(2017)
Article
Materials Science, Multidisciplinary
Sadeq Malakooti, Habel Gitogo Churu, Alison Lee, Saman Rostami, Samuel John May, Suzie Ghidei, Fen Wang, Qun Lu, Huiyang Luo, Ning Xiang, Chariklia Sotiriou-Leventis, Nicholas Leventis, Hongbing Lu
ADVANCED ENGINEERING MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Sadeq Malakooti, Saman Rostami, Habel Gitogo Churu, Huiyang Luo, Jenna Clark, Fabiola Casarez, Owen Rettenmaier, Soheil Daryadel, Majid Minary-Jolandan, Chariklia Sotiriou-Leventis, Nicholas Leventis, Hongbing Lu
Article
Chemistry, Applied
Aliyeh Feghhi, Reihaneh Malakooti, Sadeq Malakooti
APPLIED ORGANOMETALLIC CHEMISTRY
(2019)
Article
Energy & Fuels
Dongyang Cao, Sadeq Malakooti, Vijay N. Kulkarni, Yao Ren, Yingjian Liu, Xu Nie, Dong Qian, D. Todd Griffith, Hongbing Lu
Summary: The study highlights the importance of resin uptake in determining the flexural properties of sandwich composites used in wind turbine blades. It is found that different resin uptake levels can significantly impact the specific flexural strength and modulus of the composite materials. Additionally, the findings suggest that the failure mode of the sandwich composites is influenced by the core stiffness and surface texture, with different types of cores exhibiting different failure mechanisms.
Article
Materials Science, Multidisciplinary
Sadeq Malakooti, A. B. M. Shaheen Ud Doulah, Yao Ren, Vijay N. Kulkarni, Rushi U. Soni, Vaibhav A. Edlabadkar, Runyu Zhang, Stephanie L. Vivod, Chariklia Sotiriou-Leventis, Nicholas Leventis, Hongbing Lu
Summary: Shape-memory poly(isocyanurate-urethane) (PIR-PUR) aerogels can return to their permanent shape through heating and exhibit an auxetic effect with a negative Poisson's ratio. This technology has potential applications in medical devices, robotics, and space structures.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Sadeq Malakooti, Stephanie L. Vivod, Michael Pereira, Charles R. Ruggeri, Duane M. Revilock, Daniel A. Scheiman, Haiquan Guo, Jonathan A. Salem, Othmane Benafan, James C. Johnston, Linda S. Mccorkle
Summary: This study examines the effect of incorporating fabrics into the matrix of polyimide aerogels during the gelation process. It is found that carbon fabric-based composites outperform ultra-high-molecular-weight polyethylene fabric-based counterparts. The addition of one carbon fabric reduces the out-of-plane thermal conductivity of the aerogel composites by approximately half at room temperature.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Acoustics
Nader Mohammadi
Summary: This study focuses on controlling the interior noise of the MB truck cabin by reducing noise in the transmission path. The main sources of cabin noise include the engine, exhaust system, air inlet system, driveline system, and tires. Vibration of the body and interior parts of the truck also contribute to in-cabin sound level. Airborne and structure-borne noise are both considered in the noise treatment phase. Using viscoelastic layer damping material, suitable material thickness, sound barrier, silicon adhesive, and foam can effectively reduce vibration amplitude and overall in-cabin sound level.
ARCHIVES OF ACOUSTICS
(2023)
Article
Chemistry, Physical
Sadeq Malakooti, Mohammad I. Hatamleh, Rui Zhang, Tahereh Taghvaee, Max Miller, Yao Ren, Ning Xiang, Dong Qian, Chariklia Sotiriou-Leventis, Nicholas Leventis, Hongbing Lu
Summary: The study reveals a mechanical metamaterial-like behavior in aliphatic polyurea aerogels based on their micro/nanostructure, showing broadband vibration mitigation at low frequencies. The negative dynamic material stiffness of the micro-metastructured aerogels is confirmed through simulations, covering a wider frequency range compared to previously reported locally resonant metamaterials.
Article
Materials Science, Multidisciplinary
Sadeq Malakooti, Guoqiang Qin, Chandana Mandal, Rushi Soni, Tahereh Taghvaee, Yao Ren, Huiluo Chen, Nicholas Tsao, James Shiao, Shameek Sushil Kulkarni, Chariklia Sotiriou-Leventis, Nicholas Leventis, Hongbing Lu
ACS APPLIED POLYMER MATERIALS
(2019)