Article
Materials Science, Multidisciplinary
Aditya Vasudevan, Yuri Lubomirsky, Chih-Hung Chen, Eran Bouchbinder, Alain Karma
Summary: Recent research has shown that the oscillatory instability and tip-splitting instability in 2D dynamic fracture are influenced by the nonlinear elastic and dissipation length scales, demonstrating the universality of these instabilities.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Robert C. Viesca
Summary: We investigate the existence of a characteristic length for non-linear interfacial slip instability based on theoretical descriptions of sliding friction. By examining friction laws and their relationship with contact body elasticity, we find that such a length may not always be present. Our analysis of various descriptions of frictional strength reveals that the area required to support slip instability is negligible for laws that align more closely with experimental data. This challenges the notion of a minimum earthquake size and suggests that the nucleation phase of dynamic rupture contains valuable information on the evolution of frictional strength.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Editorial Material
Geochemistry & Geophysics
Ze'ev Reches, Jay Fineberg
Summary: Earthquakes are caused by dynamic fractures due to overstresses, not governed by the frictional properties of faults. Frictional interfaces can sustain a wide range of stresses before sliding, generating stress-fields and rupture dynamics. The values of stresses and energy dissipation are determined by fault frictional properties.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Materials Science, Multidisciplinary
Pengfei Wang, Hebin Jiang, Mao Liu, Liang Zhang, Songlin Xu
Summary: Lubricant exhibits abnormal strengthening and toughening effects during high-speed perforation, improving the resistance of laminar aluminum through reducing stress concentration, delaying failure displacement, and increasing dissipated energy. This phenomenon is significant for understanding the friction and fracture evolution in developing membrane-like protective structures.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
M. D. Thouless, S. Goutianos
Summary: The stress singularities at corners of elastic bodies are not strong enough to cause fracture, unless there is a crack. This study re-examines these elastic stresses using cohesive-zone models and presents a framework to understand fracture at corners. It shows that the cohesive length, xi, plays a crucial role in allowing fracture (and slip) at a corner, and how stress-intensity factor and phase angle reduce to linear-elastic fracture mechanics in the case of a crack. The study also reveals that the normal and shear deformations across the interface at a corner are generally coupled, leading to complex behavior.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Ceramics
Yuanyuan Ma, Zhiyong Wang, Youquan Qin
Summary: Understanding the relationship between mechanical response and fracture behavior is crucial for evaluating the impact performance of ceramic materials. In this study, the constitutive behaviors of alumina ceramics were determined using the split-Hopkinson pressure bar (SHPB) system and high-speed camera. It was found that the failure strength of alumina is highly dependent on the strain rate, particularly beyond a critical value. Incorporating the degradation of modulus in the evaluation enabled more accurate determination of the transition strain rate.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Hao Dong, Nichole Moyle, Haibin Wu, Constantine Yuri Khripin, Chung-Yuen Hui, Anand Jagota
Summary: Lubricated contacts in soft materials are common in various applications. The transition between elasto-hydrodynamic lubrication (EHL) and mixed lubrication (ML) regimes governs the minimum sliding friction achievable. Previous belief held that the transition occurs when the thickness of the lubricant layer is comparable with the amplitude of surface roughness, but this study found that the transition can occur when the thickness of the liquid layer is much larger than the height of the asperities. Direct visualization showed the formation of wave-like surface wrinkles triggering the transition to the mixed regime.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Thao Nguyen, Carl P. Trujillo, David R. Jones, Saryu J. Fensin, Darby J. Luscher
Summary: In this work, expanding cylinder experiments are conducted to investigate the dynamic deformation and failure behavior of aluminum 6061 alloy with surface defects. The experiments are then modeled using the modified Tepla model, and the model parameters are calibrated using the Bayesian approach. The simulations show excellent agreement with experimental results, and the influence of surface defect size and cylinder wall geometry on the dynamic strength of the cylinder wall is also studied.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Jacopo Brunetti, Walter D'Ambrogio, Annalisa Fregolent
Summary: Dynamic substructuring methods were initially developed to assess the dynamic behavior of time-invariant systems by coupling component substructures. However, when the component substructures change position over time, the dynamics of the entire structure can be affected. This paper introduces a simplified approach to the realistic contact assumption, neglecting the angular variation of the direction normal to the contact interface, in order to highlight friction-induced instabilities and reduce computational burden.
Article
Materials Science, Multidisciplinary
Miguel Castellano, Flavio Lorez, David S. Kammer
Summary: The onset of frictional sliding is initiated by the quasi-static growth of localized slip patches, which become unstable and dynamically continue to grow until the entire interface slides. The length of these patches, known as the nucleation length, can be calculated using stress criterion or energy criterion depending on whether the dominant process is yielding or fracture. However, both approaches have limitations in capturing the intermediate stages. In this study, numerical simulations show that high frictional heterogeneity enables a transition from a yielding-driven nucleation phase to a fracture-driven one, with the nature of the transition dependent on the correlation length of frictional strength and the difference in strength along the interface. The transition can lead to localized dynamic slip events, whose magnitude is affected by the correlation length and amplitude.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Physics, Fluids & Plasmas
Brianna MacNider, Xudong Liang, Samantha Hoang, Maroun Abi Ghanem, Shengqiang Cai, Nicholas Boechler
Summary: In this study, we investigate the formation of dynamic wrinkles in a system consisting of a stiff film on a viscoelastic substrate, and observe spatiotemporally varying wavelengths that depend on the impact velocity. The observed range of wavelengths exceeds that observed under quasistatic loading and is influenced by both inertial and viscoelastic effects. Additionally, we examine the influence of film damage on the dynamic buckling behavior and find that it can be tailored. This work is expected to have applications in soft elastoelectronic and optic systems, as well as open up new routes for nanofabrication.
Article
Multidisciplinary Sciences
Yuanzhe Li, Pengpeng Bai, Hui Cao, Lvzhou Li, Xinxin Li, Xin Hou, Jingbo Fang, Jingyang Li, Yonggang Meng, Liran Ma, Yu Tian
Summary: This study demonstrates a method based on stereo vision to measure three-dimensional traction stress with high spatial and temporal resolution. The method can be applied in various fields such as biology, physics, and robotics, and has important implications for related applications.
Article
Engineering, Chemical
Bo Zhang
Summary: This paper proves the friction law by proposing the asynchronous rupture of adhesive junction, which states that static friction is higher than dynamic friction. It also shows that the dynamic friction coefficient is about 0.5-0.67 of the static friction coefficient.
Article
Mechanics
B. N. Fedulov, D. A. Bondarchuk, A. N. Fedorenko, E. Lomakin
Summary: The present study investigates the effect of the polymerization process in the thermoset matrix of a laminated composite plate on the stress state near the free edge. Simulation of the curing process was carried out using coupled thermal and structural analysis to estimate the residual stresses. The study includes modeling of the cutting process, simulation of crack growth caused by residual stresses, and modeling of uniaxial load to the laminate up to failure with consideration of a crack near the free edge.
Article
Chemistry, Physical
Tara K. Venkatadri, Thomas Henzel, Tal Cohen
Summary: Soft adhesive contacts are widely seen in nature and increasingly used in synthetic systems. The performance of soft adhesives under shear and torsion is not well understood but may be important in engineering applications. This study investigates the controlled delamination of soft cylinders under combined compression and torsion, revealing the nucleation and propagation of delamination along the circumference of the cylinder. A theoretical model explains the observed sequence of 'stick-slip' events and the sensitivity of the delamination process to material parameters. The experimental approach and theoretical framework provide insights for the design of adhesives in future applications.
Article
Geochemistry & Geophysics
E. Bayart, I. Svetlizky, J. Fineberg
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2018)
Article
Multidisciplinary Sciences
David S. Kammer, Ilya Svetlizky, Gil Cohen, Jay Fineberg
Review
Physics, Condensed Matter
Ilya Svetlizky, Elsa Bayart, Jay Fineberg
ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 10
(2019)
Article
Multidisciplinary Sciences
Hadar Shlomai, David S. Kammer, Mokhtar Adda-Bedia, Jay Fineberg
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Geochemistry & Geophysics
H. Shlomai, M. Adda-Bedia, R. E. Arias, Jay Fineberg
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Physics, Multidisciplinary
Neri Berman, Gil Cohen, Jay Fineberg
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Lital Rozen-Levy, John M. Kolinski, Gil Cohen, Jay Fineberg
PHYSICAL REVIEW LETTERS
(2020)
Article
Materials Science, Multidisciplinary
H. Shlomai, D. S. Kammer, M. Adda-Bedia, R. E. Arias, J. Fineberg
Summary: The rupture dynamics of the interface joining two materials under frictional contact is significantly influenced by the mechanical properties of the bulk materials that bound the interface. When the materials are similar, Linear Elastic Fracture Mechanics quantitatively describe the rupture, but when the elastic properties differ, bimaterial coupling effects come into play. The study shows that at low rupture velocities, bimaterial cracks described by LEFM govern the interface rupture, but as velocities increase, bimaterial cracks become unstable at a subsonic critical rupture velocity.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Physics, Multidisciplinary
Shahar Gvirtzman, Jay Fineberg
Summary: Frictional motion between surfaces is initiated by the formation of nucleating rupture fronts, which develop from a certain stress level and have a characteristic velocity. Rapid rupture fronts, similar to earthquakes, mediate the transition to frictional motion and are well described by fracture mechanics. The nucleation of rupture fronts precedes slow nucleation fronts within rough frictional interfaces and is a critical question that remains to be fully understood.
Article
Materials Science, Multidisciplinary
Meng Wang, Mokhtar Adda-Bedia, John M. Kolinski, Jay Fineberg
Summary: The secondary structure of low-speed crack propagation in hydrogels has a significant influence on energy balance, and its implementation must account for local dynamic dissipation along the crack front.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Geochemistry & Geophysics
Shahar Gvirtzman, Jay Fineberg
Summary: Frictional interfaces become unstable due to earthquake-like ruptures, which are similar to shear cracks. The nucleation of rupture determines the onset of friction and it is influenced by local stress and contact area topography. Nucleation events occur as 2D patches that expand at low velocities and are affected by the local stress level.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Editorial Material
Geochemistry & Geophysics
Ze'ev Reches, Jay Fineberg
Summary: Earthquakes are caused by dynamic fractures due to overstresses, not governed by the frictional properties of faults. Frictional interfaces can sustain a wide range of stresses before sliding, generating stress-fields and rupture dynamics. The values of stresses and energy dissipation are determined by fault frictional properties.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Multidisciplinary Sciences
Meng Wang, Songlin Shi, Jay Fineberg
Summary: Brittle materials were conventionally believed to have crack propagation speeds limited by the Rayleigh wave speed. However, our experimental study on brittle neo-hookean materials shows the existence of supershear tensile cracks, which can surpass the shear wave speed and even approach the dilatation wave speed. The dynamics of supershear cracks are controlled by different principles compared to classical cracks and this nonclassical fracture mode occurs at critical strain levels specific to the material, representing a fundamental shift in our understanding of fracture processes.
Article
Physics, Multidisciplinary
Meng Wang, Mokhtar Adda-Bedia, Jay Fineberg
Summary: Slow cracks can be simple with a single fracture plane or segmented with multiple fracture planes. The merging of these planes forms steps along the fracture surfaces, which dynamically propagate within a crack front. Real-time measurements show that step dynamics significantly increase energy dissipation and change crack dynamics. The transition from stepped cracks to simple cracks occurs when their in-plane front lengths become equal and a perturbation momentarily changes step topology. These 3D crack dynamics challenge traditional understanding of fracture.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Mechanics
Jay Fineberg
COMPTES RENDUS MECANIQUE
(2020)
