Article
Materials Science, Multidisciplinary
Bin Sun, Xingzhen Huang, Zhaodong Xu
Summary: The developed algorithm can accurately simulate the damage and fracture process of metal films, studying their failure mechanisms. Compared to traditional continuum damage mechanics simulation methods, the algorithm can provide relatively accurate prediction results for damage and fracture bands.
MECHANICS OF MATERIALS
(2021)
Article
Thermodynamics
Xian Xi, Yifan Tao, Shuguang Jiang, Chenchen Yin
Summary: The study investigated the effect of activator on the properties of composite foam slurry material (CFSM) and analyzed the whole process of CFSM under uniaxial compression. The results showed that activator could improve the compressive strength of CFSM and enhance its structural compactness. CFSM exhibited unique deformation damage patterns and energy absorption effects during stress loading.
Article
Physics, Fluids & Plasmas
Soumyajyoti Biswas, Bikas K. Chakrabarti
Summary: In a society with limited resources and competition, inequalities are abundant and can be quantitatively represented by various indices and functions. These inequalities can be studied and predicted using statistical methods in different areas, such as economics and scientometrics.
Article
Multidisciplinary Sciences
Alexander D. Snyder, Zachary J. Phillips, Jack S. Turicek, Charles E. Diesendruck, Kalyana B. Nakshatrala, Jason F. Patrick
Summary: Synthetic materials with self-repair capabilities similar to biological systems are crucial for meeting the infrastructural demands of the 21st century. In this study, the authors developed fiber-reinforced composites that can rapidly and repeatedly self-heal in situ while maintaining structural integrity. This finding overcomes existing obstacles in achieving mechanical self-recovery and has the potential to extend the lifespan and widespread use of bioinspired structural materials.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Evelin Sipos, Akos Juhasz, Miklos Zrinyi
Summary: This research aims to establish the characteristic load-displacement behavior of weak, planar, randomly oriented fiber bundles. The mechanical behavior of these materials deviates significantly from traditional materials, showing a dependence on damage formation that results in stiffness reduction. By studying the evolution of ruptures during elongation, the researchers were able to determine the sequence of rupture force and magnitude of force drops. The experimental technique used in this study can provide insights into the load bearing capacity of various synthetic and biological textures composed of fibers.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Physics, Multidisciplinary
Santanu Sinha, Subhadeep Roy, Alex Hansen
Summary: The competition between thermal fluctuations and stress enhancement in the failure process of a disordered system was studied using a local load sharing fiber bundle model. It was observed that at a finite temperature and low disorder strength, the failure process becomes spatially uncorrelated when the applied stress is sufficiently low, closely related to the universality class of ordinary percolation. Increase in applied stress beyond a threshold value leads to the appearance of localized fractures in the system.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Mathematics, Interdisciplinary Applications
Attia Batool, Gergo Pal, Zsuzsa Danku, Ferenc Kun
Summary: We studied the failure process of fiber bundles on complex networks and focused on the effect of the degree of disorder of fibers' strength on the transition from localized to mean field behavior. We found that the degree of strength disorder of network nodes has a substantial effect on the transition, which occurs at a finite rewiring probability and increases as the degree of disorder decreases.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Materials Science, Ceramics
Yan Chen, Anqi Zhang, Barton C. Prorok
Summary: This study optimized the Indirect Indentation Method for measuring the elastic properties of brittle materials by selecting appropriate thin film materials and parameters, leading to more accurate and reliable results.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Yao Qiao, Robert J. Seffens, Ethan K. Nickerson, Timothy J. Roosendaal, Daniel R. Merkel, Yongsoon Shin, Jose L. Ramos, Seunghyun Ko, Avik Samanta, Madhusudhan R. Pallaka, Angel Ortiz, Kevin L. Simmons
Summary: This work comprehensively characterizes the failure behavior of adhesive joints in different material combinations under global shear deformation. The adhesive features and main progressive damage mechanisms are quantified and identified using measurement methods such as Digital Imaging Correlation and 3D optical profilometry. The obtained data contribute to a better understanding of shear failure in adhesive bonding and have practical implications for adhesive bonding design, failure analysis, and computational model development.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Materials Science, Multidisciplinary
Peilei Zhang, Fengqiang Gong, Song Luo, Xuefeng Si, Lei Xu
Summary: Coal plays a crucial role in China's energy production and consumption, and serves as the foundation for energy security. This study introduces a correction coefficient considering the compaction effect of coal material and constructs a novel damage constitutive model that accurately describes the overall compression state of coal material. Experimental results show that this model can more accurately describe the nonlinear strength and deformation characteristics of coal material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Yang Cheng, Liangliang Zhang
Summary: This study conducted uniaxial and five conventional triaxial compression tests on sandstone to investigate the evolution laws of energy densities. The input and dissipative energy densities increased with increasing axial strain, while the elastic strain energy density increased up to the peak and decreased afterwards. Based on the linear relationship between peak elastic strain energy density and confining pressure, a precise and physically meaningful energy density failure criterion for sandstone was established. The results of strength calculations for seven different rocks using this criterion showed good agreement with experimental values, demonstrating its accuracy and applicability.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Qian Zhang, Kai Xie, Yun Luo, Yu-Cai Zhang, Wen-Chun Jiang
Summary: In this study, the mismatch effect of material creep strength coefficient on creep damage and failure probability of planar solid oxide fuel cell (SOFC) was investigated. It was found that increasing the creep strength coefficient of the sealant layer leads to an increase in the creep damage and failure probability. Therefore, it is suggested to have a lower creep strength coefficient for the sealant layer compared to the frame material, which will improve the service life of the SOFC.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Ming Pei, Donghua Zou, Yong Gao, Jianhua Zhang, Ping Huang, Jiawen Wang, Jiang Huang, Zhengdong Li, Yijiu Chen
Summary: The study aimed to investigate the influence of specimen geometry and size on aortic uniaxial tensile tests. Rectangular samples were found unsuitable until rupture, while dog-bone-shaped samples with a width of 4 mm were identified as the optimal choice for testing.
Article
Engineering, Civil
Chuanxiang Zheng, Zhenyu Wang, Liang Wang, Jinjie Lu, Jiao Lin, Yuchen Dai
Summary: The failure behavior of grid stiffeners under tension and flexural loadings is investigated through experimental and numerical studies. Three different typical layup schemes at the intersection were manufactured and tested. A 3D anisotropic damage model based on continuum damage mechanics is developed to model the progressive failure behaviors. The introduction of discontinuous plies at the intersection changes the failure mechanism and improves the mechanical performance of the grid structure, with the tensile and flexural strength improved by 21% and 23% respectively by properly introducing 25% of discontinuous plies. This work provides insights on the failure mechanisms of composite grid stiffeners, and the results can be used for optimization design of grid structures.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Physical
Kwangnam Kim, Dongsu Park, Hun-Gi Jung, Kyung Yoon Chung, Joon Hyung Shim, Brandon C. Wood, Seungho Yu
Summary: This study systematically investigates the performance and stability of lithium halides Li3MX6 as solid electrolytes for high-voltage all-solid-state Li-ion batteries. The findings suggest that chlorides exhibit high oxidation potential and stability, making them suitable for high-voltage cathode materials.
CHEMISTRY OF MATERIALS
(2021)
Article
Physics, Multidisciplinary
Santanu Sinha, Subhadeep Roy, Alex Hansen
Summary: The competition between thermal fluctuations and stress enhancement in the failure process of a disordered system was studied using a local load sharing fiber bundle model. It was observed that at a finite temperature and low disorder strength, the failure process becomes spatially uncorrelated when the applied stress is sufficiently low, closely related to the universality class of ordinary percolation. Increase in applied stress beyond a threshold value leads to the appearance of localized fractures in the system.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Physics, Multidisciplinary
Harish Charan, Alex Hansen, H. G. E. Hentschel, Itamar Procaccia
Summary: This study focuses on the probability distribution function of polymer chain collapse under fixed tension and temperature, with a particular emphasis on the fast collapse rates. The research reveals that the tail of the PDF follows a power law with a universally determined exponent. Extensive numerical analysis validates the proposed theory and draws lessons applicable to similar problems.
PHYSICAL REVIEW LETTERS
(2021)
Correction
Engineering, Chemical
Magnus Aa. Gjennestad, Mathias Winkler, Alex Hansen
Summary: The Electronic Supplementary Material was missing when the article was originally published.
TRANSPORT IN POROUS MEDIA
(2021)
Article
Physics, Multidisciplinary
Santanu Sinha, Magnus Aa. Gjennestad, Morten Vassvik, Alex Hansen
Summary: The study presents a set of algorithms for simulating dynamic pore-network model of immiscible two-phase flow in porous media, applicable for both drainage displacements and steady-state flow. The algorithms effectively reproduce fundamental results of transient and steady-state two-phase flow in porous media, showing the ability to replicate flow patterns like viscous fingering, capillary fingering, and stable displacement by adjusting capillary number and viscosity ratio. Additionally, the algorithms verify nonlinear rheological properties and the transition to linear Darcy behavior with increasing flow rate, as well as establish relationships between seepage velocities in two-phase flow in porous media with regular and irregular networks.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Eirik G. Flekkoy, Alex Hansen, Beatrice Baldelli
Summary: By using a particle model with interactions based on local particle concentration, hyperballistic diffusion can be observed through exact solutions of nonlinear diffusion equations and particle simulations, connected by the Fokker-Planck equation.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Wojciech Debski, Srutarshi Pradhan, Alex Hansen
Summary: Studies have shown that the phenomenon of the maximum rate of change of elastic energy occurring before catastrophic failure is commonly observed in fiber bundle models and simulations of thin tissue fracturing, serving as a predictor for imminent collapse.
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Chemical
Hursanay Fyhn, Santanu Sinha, Subhadeep Roy, Alex Hansen
Summary: The study investigated immiscible two-phase flow in porous media with mixed wet conditions using a capillary fiber bundle model and a dynamic pore network model. The results showed that mixed wettability significantly influences the rheology in terms of the dependence of global volumetric flow rate on global pressure drop.
TRANSPORT IN POROUS MEDIA
(2021)
Article
Physics, Multidisciplinary
Mads Fromreide, Alex Hansen
Summary: The ability to navigate safely and efficiently through a given landscape is important for intelligent moving objects. By establishing models of patterns of motion, future motion within an area can be estimated, and a method for detecting regular patterns of motion by modeling the environment as an energy landscape shows potential for analyzing and determining regular patterns of motion.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Knut Jorgen Maloy, Marcel Moura, Alex Hansen, Eirik Grude Flekkoy, Renaud Toussaint
Summary: This study investigates drainage in porous media, focusing on stabilized fluid fronts and considering capillary, viscous, and gravitational forces. The theoretical framework allows for calculation of various properties based on specific parameters, and explains the relationship between local activity and dissipation on larger scales.
FRONTIERS IN PHYSICS
(2021)
Editorial Material
Physics, Multidisciplinary
Alex Hansen, Ferenc Kun, Srutarshi Pradhan, Purusattam Ray
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Chemical
Subhadeep Roy, Hakon Pedersen, Santanu Sinha, Alex Hansen
Summary: This study presents a continuum approach to describe immiscible two-phase flow in porous media, by transforming the relationship between two velocity couples and incorporating the constitutive equation directly. The results show that this method can provide consistent and effective constitutive equations under different parameters.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Water Resources
Alex Hansen, Eirik Grude Flekkoy, Santanu Sinha, Per Arne Slotte
Summary: We have developed a statistical mechanics model based on the Jaynes maximum entropy principle to describe immiscible and incompressible two-phase flow in porous media under local steady-state conditions. A cluster entropy is used to capture our lack of knowledge about the fluid and flow configurations in the pore space. This approach introduces two new variables, agiture and flow derivative, which correspond to the level of agitation of the fluids and the saturation, respectively. By applying a thermodynamics-like formalism, we uncover previously unknown relationships and fluctuations between these flow variables. This formalism offers new approaches to characterize porous media and multi-phase flow for practical applications, while maintaining a manageable number of variables.
ADVANCES IN WATER RESOURCES
(2023)
Article
Engineering, Chemical
Federico Lanza, Alberto Rosso, Laurent Talon, Alex Hansen
Summary: This paper investigates the flow characteristics of fluid blobs of non-Newtonian fluids in a capillary tube. By computing the threshold pressure drop and mean flow rate, we find that capillary effects arise from the non-uniformity of the tube radius and are influenced by the presence of multiple blobs.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Engineering, Chemical
Hyejeong L. Cheon, Hursanay Fyhn, Alex Hansen, Oivind Wilhelmsen, Santanu Sinha
Summary: We study the immiscible two-phase flow of compressible and incompressible fluids under steady-state conditions in a capillary tube with varying radius. The capillary forces due to the surface tension between the fluids vary along the tube due to the radius variation. The interplay between capillary forces and compressibility leads to different properties compared to incompressible two-phase flow. As the fluids move towards the outlet, the bubbles of compressible fluid increase in volume due to the decrease in pressure. The volumetric growth of the bubbles results in a higher volumetric flow rate at the outlet than at the inlet. The bubble growth depends not only on the pressure drop across the tube but also on the ambient pressure. Furthermore, capillary forces create an effective threshold below which there is no flow. Above the threshold, the system exhibits a weak nonlinearity between flow rates and effective pressure drop, with this nonlinearity also depending on the absolute pressures across the tube.
TRANSPORT IN POROUS MEDIA
(2023)
Article
Physics, Fluids & Plasmas
Vincenzo Maria Schimmenti, Federico Lanza, Alex Hansen, Silvio Franz, Alberto Rosso, Laurent Talon, Andrea De Luca
Summary: Understanding the flow behavior of yield stress fluids in porous media is a challenge. This study presents a treelike porous structure that allows for an exact resolution of the flow problem using directed polymer (DP) with disordered bond energies on the Cayley tree. The results confirm nonlinear flow behavior and provide a full expression of its pressure dependence through the density of low-energy paths of DP restricted to vanishing overlap. Extensive numerical simulations validate these universal predictions.
