AI Article Synopsis
- A thin elastic membrane floating on a liquid pool deforms when struck by a rigid object, creating two types of waves.
- The first wave is a longitudinal wave that moves at a constant speed and marks regions of different stress states in the membrane, while the second wave is a dispersive transverse wave that varies in speed based on how much the membrane is stretched.
- The study reveals a self-similar dynamic behavior of these waves, paralleling capillary waves but with a unique surface tension influenced by the speed of impact, and it also discusses the emergence of radial wrinkles and the implications for impact energy absorption.
Article Abstract
When impacted by a rigid body, a thin elastic membrane with negligible bending rigidity floating on a liquid pool deforms. Two axisymmetric waves radiating from the impact point propagate. First, a longitudinal wave front, associated with in-plane deformation of the membrane and traveling at constant speed, separates an outward stress-free domain from a stretched domain. Then, in the stretched domain a dispersive transverse wave travels at a speed that depends on the local stretching rate. The dynamics is found to be self-similar in time. Using this property, we show that the wave dynamics is similar to the capillary waves that propagate at a liquid-gas interface but with a surface tension coefficient that depends on impact speed. During wave propagation, we observe the development of a buckling instability that gives rise to radial wrinkles. We address the dynamics of this fluid-body system, including the rapid deceleration of an impactor of finite mass, an issue that may have applications in the domain of absorption of impact energy.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.93.052801 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Multisite Randomized Feasibility Trial of a Remotely Delivered Pelvic Yoga Program for Women with Chronic Pelvic Pain Syndrome.
J Integr Complement Med
December 2024
Department of Medicine, University of California San Francisco, San Francisco, California, USA.
Yoga has been recommended as a complementary management strategy for women with chronic pelvic pain (CPP), but many women lack access to specialized yoga instruction for this indication, and few data are available to evaluate changes in CPP with yoga. This feasibility trial evaluated the acceptability and tolerability of a remotely delivered yoga program for CPP in women and examined data quality and interpretability for measures of pelvic pain intensity and impact with yoga instruction. Ambulatory women with CPP were recruited from northern California in 2020-2022 and randomly assigned to a 2-month program involving twice weekly group classes delivered by videoconference supplemented by individual practice of pelvic yoga techniques versus a control program involving equivalent-time instruction and practice of nonspecific skeletal muscle stretching-strengthening exercises.
View Article and Find Full Text PDFDisruption of Molecular Interactions between the G3BP1 Stress Granule Host Protein and the Nucleocapsid (NTD-N) Protein Impedes SARS-CoV-2 Virus Replication.
Biochemistry
December 2024
Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India.
The Ras GTPase-activating protein SH3-domain-binding protein 1 (G3BP1) serves as a formidable barrier to viral replication by generating stress granules (SGs) in response to viral infections. Interestingly, viruses, including SARS-CoV-2, have evolved defensive mechanisms to hijack SG proteins like G3BP1 for the dissipation of SGs that lead to the evasion of the host's immune responses. Previous research has demonstrated that the interaction between the NTF2-like domain of G3BP1 (G3BP1) and the intrinsically disordered N-terminal domain (NTD-N) of the N-protein plays a crucial role in regulating viral replication and pathogenicity.
View Article and Find Full Text PDFPhotonic Band Gap Engineering by Varying the Inverse Opal Wall Thickness.
Int J Mol Sci
December 2024
Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, H-3515 Miskolc, Hungary.
We demonstrate the band gap programming of inverse opals by fabrication of different wall thickness by atomic layer deposition (ALD). The opal templates were synthesized using polystyrene and carbon nanospheres by the vertical deposition method. The structure and properties of the TiO inverse opal samples were investigated using Scanning Electron Microscope (SEM) and Focused Ion Beam Scanning Electron Microscopy (FIB-SEM), Energy Dispersive X-ray analysis (EDX), X-ray Diffraction (XRD) and Finite Difference Time Domain (FDTD) simulations.
View Article and Find Full Text PDFRevealing Long-Range Order in Brush-like Graft Copolymers Through In Situ Measurements of X-Ray Scattering During Deformation.
Polymers (Basel)
November 2024
Department of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia.
Brush-like graft copolymers (A-g-B), in which linear A-blocks are randomly grafted onto the backbone of a brush-like B-block, exhibit intense strain-stiffening and high mechanical strength on par with load-bearing biological tissues such as skin and blood vessels. To elucidate molecular mechanisms underlying this tissue-mimetic behavior, in situ synchrotron X-ray scattering was measured during uniaxial stretching of bottlebrush- and comb-like graft copolymers with varying densities of poly(dimethyl siloxane) and poly(isobutylene) side chains. In an undeformed state, these copolymers revealed a single interference peak corresponding to the average spacing between the domains of linear A-blocks arranged in a disordered, liquid-like configuration.
View Article and Find Full Text PDFHuman TMC1 and TMC2 are mechanically gated ion channels.
Neuron
December 2024
Institute of Molecular Physiology, Shenzhen Bay Laboratory, Shenzhen, China; Department of Neurobiology, School of Basic Medicine, Capital Medical University, Beijing, China; Institute for Medical Physiology, Chinese Institutes for Medical Research, Beijing, China. Electronic address:
Mammalian transmembrane channel-like proteins 1 and 2 (TMC1 and TMC2) have emerged as very promising candidate mechanotransduction channels in hair cells. However, controversy persists because the heterogeneously expressed TMC1/2 in cultured cells lack evidence of mechanical gating, primarily due to their absence from the plasma membrane. By employing domain swapping with OSCA1.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!