Article
Engineering, Multidisciplinary
Andrea Piccolroaz, Daniel Peck, Michal Wrobel, Gennady Mishuris
Summary: Linear Elastic Fracture Mechanics assumes crack faces are traction-free, but in some practical situations crack boundaries may have singular loads, affecting the calculation of Energy Release Rate.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
T. Benkley, C. Li, J. Kolinski
Summary: A deformation gradient tensor estimator is developed based on a particle tracking technique and a least squares routine, which accurately measures the deformation gradient tensor near boundary discontinuities. The method is verified by theoretical simulations and physical experiments, showing high accuracy and feasibility. It is expected to advance material testing and experimental mechanics studies in cases of large deformation and rotation.
EXPERIMENTAL MECHANICS
(2023)
Article
Mechanics
Bence Hauck, Andras Szekrenyes
Summary: In this paper, the authors focus on the finite element discretization of delaminated polymer composite plates for fracture mechanical analysis. They use the first-order shear deformation plate theory and two equivalent single layers. The analysis includes linear elastic orthotropic material behavior and the determination of the energy release rate along the crack front through the J-integral. The authors discuss the differences derived from the continuity conditions and boundary conditions between the semi-analytical and finite element approaches.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
H. Haftbaradaran, S. Esmizadeh
Summary: In this study, the interaction between a solute atmosphere and a crack under external loading is examined within the framework of statistical mechanics, considering image stresses and using Monte Carlo simulations. Results show that solute redistribution induced by tensile loading increases the energy release rate (ERR) of crack growth, and even at high temperatures where solute distribution is nearly uniform, the interaction between the collective image stress field of the solutes and loading stress field contributes to the ERR, strengthening with solute concentration and external loading.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Md. Imrul Reza Shishir, Mohan Surya Raja Elapolu, Alireza Tabarraei
Summary: The molecular dynamics simulations are used to investigate the mechanical and fracture properties of C3N, revealing crack propagation in the zigzag direction and the inability of Griffith theory to predict fracture strength for short cracks. The notch effects play a crucial role in predicting fracture strength for C3N.
MECHANICS OF MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Himanshu Gaur, Anupam Srivastav
Summary: This article presents a novel approach for material nonlinear analysis, eliminating tedious incremental steps and providing direct results in both linear and nonlinear material behavior ranges. By using stress and strain functions derived from stress-strain behavior through curve fitting, this method proves to be accurate, easy to adopt, and simple in calculations. The stress-based analysis approach is suitable for solving various structural problems, including fracture mechanics, with results compared to classical displacement-based linear theory.
DEFENCE TECHNOLOGY
(2021)
Article
Mechanics
G. Koutsakis, M. R. Begley, J. W. Hutchinson, J. B. Ghandhi
Summary: The durability of thermal barrier coatings for reciprocating internal combustion engine applications was studied using a thermomechanics model. The study found that there is significant temperature nonuniformity within the coating and the peak energy release rate occurs later in the cycle compared to the peak surface temperature, often within the coating. Coating thickness and residual stress were found to affect the magnitude and location of the peak energy release rate.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
N. Movahedi, A. Geravand, H. Haftbaradaran
Summary: Phase separation induced by electrochemical cycling intensifies mechanical stresses in lithium storage materials, leading to mechanical degradation of electrode particles. The elastic properties of coexisting phases significantly differ due to their different solute contents. The different elastic moduli of the phases impact stress intensity factors and energy release rates associated with pre-existing cracks in the material.
MECHANICS OF MATERIALS
(2021)
Article
Engineering, Geological
Edoardo Pezzulli, Morteza Nejati, Saeed Salimzadeh, Stephan K. Matthai, Thomas Driesner
Summary: This article revisits the formulation of the J-integral in hydraulic fracture mechanics and presents two novel contributions. The first contribution is two variations of the J-integral that accurately predict viscosity-dominated propagation. The second contribution is a methodology to extract the propagation velocity from the energy release rate applicable throughout the toughness-viscous propagation regimes. These techniques are combined to form an algorithm capable of quickly converging on the location of the fracture front independently to the toughness-viscous regime of propagation.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Engineering, Multidisciplinary
Leon Herrmann, Lars P. Mikkelsen, Brian N. Legarth, Christian F. Niordson
Summary: This study investigates the effects of microstructural on the energy release rate and mode mixity for tunneling cracks. A detailed microstructure is constructed based on scanning electron microscopy of a real laminate. The study finds that the fiber-matrix microstructure significantly influences the energy release rate, and a finite element-based homogenization provides accurate predictions. Additionally, for non-straight cracks, neglecting the microstructure leads to an underestimation of the energy release rate.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Mechanical
Anupam Tiwari, Saroja Kanta Panda
Summary: This article develops a multi-scale and multi-mechanism modeling approach to investigate the influence of macro, micro, and nanoscale mechanisms on the fracture behavior and structural integrity of nanocomposites at the CNT interface. The model considers dominant damaging phenomena, including CNT debonding, cavitation, and plastic deformation of nanovoids in CNT/epoxy nanocomposites. The enhancement of fracture toughness with the weight fraction of CNT is analyzed by varying the geometric and mechanical properties of the interphase, cavitation, and plastic yielding using strain energy release rate procedures. The model is validated using experimental and analytical data.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Yijie Cai, Jie Ma, Zihang Shen, Xianmin Shao, Zheng Jia, Shaoxing Qu
Summary: This paper presents a structural-toughening strategy for enhancing the fracture resistance of hydrogels by regulating the energy release rate. By constructing hydrogel films adhered to stretchable substrates, the strategy has several unique advantages and the influence of interfacial delamination on fracture resistance is investigated.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Chemistry, Physical
Ruqing Fang, Anhao Zuo, Zhe Li
Summary: In this study, the deformation and rate performance of SiOx material in particle scale were investigated using a single particle electrode. The study found that the capacity retention ratio of SiOx particles significantly improved at high C-rates and analyzed the spatial distribution of Li+ concentration and stress at different C-rates. The study also suggested improving the homogeneity of the electrode structure to avoid diffusion-induced failure.
JOURNAL OF POWER SOURCES
(2022)
Article
Mechanics
E. Pezzulli, M. Nejati, S. Salimzadeh, S. K. Matthaei, T. Driesner
Summary: The paper evaluates recent hydraulic fracturing propagation algorithms within the finite element framework, comparing aperture-based and energy-based methodologies for extracting propagation velocities. The study finds that while energy-based methods have higher accuracy in extracting stress intensity factors, this does not necessarily translate to higher accuracy in extracting propagation velocities.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Wu Xu, Yanshen Ren, Si Xiao, Bin Liu
Summary: The concept of energy release rate was initially applied to elastic brittle material, but this paper proposes a finite crack growth energy release rate suitable for ductile material. Compared to previous methods, this approach considers the effect of plastic dissipation on crack growth, and it has been shown to accurately predict stable crack growth and residual strengths in various scenarios.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Yizhi Zhuo, Zhijie Xia, Yuan Qi, Takashi Sumigawa, Jianyang Wu, Petr Sestak, Yinan Lu, Verner Hakonsen, Tong Li, Feng Wang, Wei Chen, Senbo Xiao, Rong Long, Takayuki Kitamura, Liangbin Li, Jianying He, Zhiliang Zhang
Summary: A transparent unfilled elastomer with enhanced toughness and stiffness is achieved by incorporating ultrastrong, reversible, and sacrificial octuple hydrogen bonding (HB). The homogeneous network structure distributes stress evenly to each polymer chain, enhancing stretchability and delaying fracture. Strong HBs and corresponding nanodomains enhance stiffness by restricting network mobility, while simultaneously improving toughness by dissipating energy during configuration transformation.
ADVANCED MATERIALS
(2021)
Article
Engineering, Mechanical
Luxia Yu, Xiaohao Sun, Yinghua Jin, Wei Zhang, Rong Long
Summary: This study investigates the evolution of porosity and tensile properties during the compression and fusion of vitrimer particles using a finite element model. It was found that using smaller particles can reduce porosity and increase tensile strength, while particles with mixed sizes can achieve better densification and higher strength after fusion. Additionally, processing time, temperature, and pressure were shown to affect porosity and modulus of the fused vitrimer.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Chemical
Jaylene Martinez, Masoud Aghajani, Yinan Lu, Adrienne K. Blevins, Shouhong Fan, Mengyuan Wang, Jason P. Killgore, Stefano Berti Perez, Jaivin Patel, Christina Carbrello, Sean Foley, Ryan Sylvia, Rong Long, Robert Castro, Yifu Ding
Summary: This study investigated the kinetics of capillary infiltration of viscous polypropylene in polyethersulfone membranes with different hydrophilicities, finding that infiltration dynamics are influenced by various factors. The mechanical integrity of the bonded films decreases slightly with increasing infiltration depth, as quantified by a modified T-peel test.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhen Yang, Xingwei Yang, Rong Long, Jianyu Li
Summary: This study investigates a thermo-responsive hydrogel adhesive through experimental, computational, and analytical methods, demonstrating that stimuli can enhance both adhesion and mechanical properties. The enhanced adhesion is attributed to the increased fracture energy of the bulk hydrogel and minimal residual stress at the adhesive-tissue interface.
Article
Engineering, Mechanical
Mahyar Afshar-Mohajer, Xingwei Yang, Rong Long, Min Zou
Summary: This study investigates the friction and deformation behavior of micro/nano-hierarchical textures, revealing a coupling between micropillar deformation and nanohair height. Furthermore, it is found that the bending of long nanohairs can provide assistive sliding forces, and lateral force can develop even before sliding due to the buckling of longer nanohairs.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Chenghai Li, Zhijian Wang, Yang Wang, Qiguang He, Rong Long, Shengqiang Cai
Summary: The polymer network structures and topologies in hydrogels play a significant role in determining their mechanical properties. Research shows that the initial monomer concentration during synthesis can influence the elasticity, stretchability, and fracture properties of hydrogels. These findings provide important insights for synthesizing hydrogels with tailorable mechanical properties.
EXTREME MECHANICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Luxia Yu, Zepeng Lei, Xiaohao Sun, Peiran Ding, Aaron Wesche, Yinghua Jin, Wei Zhang, Rong Long
Summary: Polyimine is a covalent adaptable network with dynamic imine bonds, suitable for recycling, reprocessing, and repair. Through a powder-based compression molding method, carbon fiber-reinforced polyimine composites can be rapidly fabricated with mechanical properties similar to those produced through traditional methods. Additionally, in situ, mold-free repair of polyimine composites at low temperature and pressure was demonstrated, showcasing the malleability, weldability, and full recyclability of the material.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
XiaoHao Sun, Ke Wang, HengAn Wu, Jian Chen, Rong Long
Summary: The finite element method is widely used to simulate the process of cells entering narrow channels. This study focuses on the effects of frictional boundary conditions in these simulations. By continuously updating the boundary conditions according to the contact status, the researchers study how pressure boundary conditions and friction coefficient affect the simulated cell entry process. The results show that different pressure boundary conditions produce the same result under frictionless contact but considerably different results under frictional contact. Furthermore, a larger friction coefficient can significantly reduce the entry length under a prescribed pressure or a certain entry time.
MECHANICS OF MATERIALS
(2022)
Article
Engineering, Chemical
Brodie K. Hoyer, Rong Long, Mark E. Rentschler
Summary: Rolling contact experimentation is a useful method for studying adhesive contact between surfaces. The researchers have designed a tribometric device to capture forces between a rolling indenter and substrate, and validated its effectiveness through experiments. This device can facilitate investigations of rolling contact mechanics in medical robotics.
Article
Engineering, Mechanical
Karl Johannes, Kristin Calahan, Leah Bowen, Emily Zuetell, Rong Long, Mark Rentschler
Summary: This study investigates the adhesion modulation of an elastomeric micro-patterned surface with both rigid and soft materials by applying equibiaxial tensile strain. Experimental results show that the applied strain substantially influences the adhesion behavior of the surface with both types of probes, with a different underlying mechanism for each.
EXTREME MECHANICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Kristin N. Calahan, Yuan Qi, Karl G. Johannes, Mark E. Rentschler, Rong Long
Summary: The study found that micropatterned surfaces can generate enhanced shear traction on soft tissue-like materials, thereby improving the anchoring performance of medical devices on tissue. By experimentally measuring microscale three-dimensional deformation, it was revealed that lateral contact between pillar arrays and soft hydrogel substrates plays a key role in shear response.
Article
Engineering, Mechanical
Qiang Guo, Julien Caillard, Davide Colombo, Rong Long
Summary: In this study, a scaling theory is developed to understand the dynamic effect of crack growth in viscoelastic solids under cyclic loading. The coupling between cyclic loading, crack growth, and viscoelastic creep is found to govern the viscoelastic dissipation. A simple integral equation is derived to predict the crack growth velocity under different cyclic loading frequencies.
EXTREME MECHANICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Zepeng Lei, Hongxuan Chen, Chaoqian Luo, Yicheng Rong, Yiming Hu, Yinghua Jin, Rong Long, Kai Yu, Wei Zhang
Summary: Chemical recycling of polymers is crucial for improving the circular economy and sustainability of plastics. This study demonstrates the possibility of recycling traditional polycyanurate thermosets by activating dormant covalent bonds. By redirecting the synthetic route and creating a reversible synthetic pathway, previously inaccessible alkyl-polycyanurate thermosets with high recyclability and reprocessing capability were successfully synthesized.
Article
Polymer Science
Jaylene Martinez, Shouhong Fan, Salil Rabade, Adrienne K. Blevins, Kieran Fung, Jason P. Killgore, Stefano Berti Perez, Kathy Youngbear, Christina Carbrello, Sean Foley, Xiaoyun Ding, Rong Long, Robert Castro, Yifu Ding
Summary: This study systematically examines the capillary infiltration of polypropylene within polyethersulfone membranes and identifies the significant influence of asymmetric pore structure on the infiltration kinetics. The Cai model successfully captures the accelerated infiltration rate over time. Chemical modification only affects the initial infiltration rate and has no significant impact on the later stage. Mechanical integrity tests reveal complex debonding behaviors, with the peel force corresponding to membrane failure being larger. The presence of PP nanofibers pulled out during debonding highlights the weak mechanical interlocking due to low surface porosity.
Article
Chemistry, Multidisciplinary
Yinjun Chen, C. Joshua Yeh, Qiang Guo, Yuan Qi, Rong Long, Costantino Creton
Summary: A mechanochemistry based approach using Spiropyran (SP) as a force sensitive molecular probe in multiple network elastomers (MNE) is proposed to detect and map stress history during dynamic processes. The color changes from Spiropyran to Merocyanine and subsequent reversible isomerization of Merocyanine provide insights into the stress experienced by the material. The color changes can be used to accurately map stress history during loading and unloading processes, showing excellent agreement with finite element simulations on fractured samples.
Article
Materials Science, Multidisciplinary
Yanzheng Wang, Qian Wu, Yiran Tian, Guoliang Huang
Summary: This paper proposes the microstructure design of an odd plate and investigates the directional wave energy amplification and the presence of interface waves in odd plates through theoretical and numerical analysis. The research findings contribute to the understanding of elastic behavior in 2D non-Hermitian systems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
F. Greco, D. Codony, H. Mohammadi, S. Fernandez-Mendez, I. Arias
Summary: This study overcomes the difficulty of harnessing the flexoelectric effect by designing multiscale metamaterials. Through topology optimization calculations, we obtain optimal structures for various apparent piezoelectric properties and find that low-area-fraction lattices are the preferred choice. The results show competitive estimations of apparent piezoelectricity compared to reference materials such as quartz and PZT ceramics.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Xiaoxuan Zhang, Tryaksh Gupta, Zhenlin Wang, Amalie Trewartha, Abraham Anapolsky, Krishna Garikipati
Summary: This study presents a computational framework for coupled electro-chemo-(nonlinear) mechanics at the particle scale in solid-state batteries, including interfacial fracture, degradation in charge transfer, and stress-dependent kinetics. The discontinuous finite element method allows for arbitrary particle shapes and geometries.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Chengguan Zhang, Xavier Balandraud, Yongjun He
Summary: The coexistence of both austenite and martensite is a common characteristic in Shape Memory Alloys (SMAs). The multiple-domain microstructures, consisting of austenite, martensite twins, and individual martensite variants, evolve collectively during the phase transformation, affecting the material's macroscopic response. This paper presents an experimentally observed interface consisting of five domains in a Ni-Mn-Ga single-crystal, and analyzes the effects of thermal loading path and material initial state on the domain pattern formation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Shaobao Liu, Haiqian Yang, Guang-Kui Xu, Jingbo Wu, Ru Tao, Meng Wang, Rongyan He, Yulong Han, Guy M. Genin, Tian Jian Lu, Feng Xu
Summary: The balance between stress and adhesion plays a crucial role in governing the behaviors of adherent cells, such as cell migration. In certain microenvironments, such as tumor, variations in hydrostatic pressure can significantly impact cell volume and adhesion, which in turn affects cell behavior.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Xun Xiong, Qinglei Zeng, Yonghuan Wang, Ying Li
Summary: In this work, the authors investigate the possibility of enhancing the resistance to crack growth in brittle materials through microstructure design. They establish a computational framework to simulate crack propagation and characterize fracture energy. The effects of different types of voids on toughening mechanisms are explored, and the critical conditions for embrittlement-toughening transition are identified. The study also discusses the difference between void toughening in brittle and ductile materials, and extends the toughening strategy to nacre-like materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Huan Wang, Yong-Quan Liu, Jiu-Tao Hang, Guang-Kui Xu, Xi-Qiao Feng
Summary: This study establishes a cytoarchitectural model to accurately capture the buckling and postbuckling behaviors of epithelia under fast compression. The stress evolution of epithelia is divided into three stages: loading, phase transition, and stress recovery. The postbuckling process is governed by the active tension generated by the actomyosin network. The study also proposes a minimal model that predicts the flattening time and stress recovery extent as functions of applied strain or strain rate, in agreement with simulations and experiments.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Lei Liu, Hao Liu, Yuming He, Dabiao Liu
Summary: This study investigates the mechanics and topologically complex morphologies of twisted rubber filaments using a combination of experiment and finite strain theory. A finite strain theory for hyperelastic filaments under combined tension, bending, and torsion has been established, and an experimental and theoretical morphological phase diagram has been constructed. The results accurately determine the configuration and critical points of phase transitions, and the theoretical predictions agree closely with the measurements.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Abhishek Painuly, Kunnath Ranjith, Avinash Gupta
Summary: This paper analyzes the interfacial waves caused by frictional slipping and studies their dispersion relation and wave modes. By studying the slip waves in a geophysical model, the surface wave dispersion phenomenon is explored, and an alternative explanation is proposed.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Houlin Xu, Joshua Vievering, Hoang T. Nguyen, Yupeng Zhang, Jia-Liang Le, Zdenek P. Bazant
Summary: Motivated by the extraordinary strength of nacre, this study investigated the probabilistic distribution of fishnet strength using Monte Carlo simulations and found that previous analytical solutions are not applicable for fishnets with a large number of links. By approximating large-scale fishnets as a continuum with cracks or holes, the study revealed that the strength distribution follows the Weibull distribution. This new model has significance for optimizing the strength-weight ratio in printed material structures.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Souhayl Sadik, Arash Yavari
Summary: This paper revisits the mathematical foundations of nonlinear viscoelasticity and studies the geometry of viscoelastic deformations. It discusses the decomposition of the deformation gradient into elastic and viscous distortions and concludes that the viscous distortion can only be a two-point tensor. The governing equations of nonlinear viscoelasticity are derived and the constitutive and kinetic equations for various types of viscoelastic solids are discussed.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Wen Cheng, Hongkuan Zhang, Yu Wei, Kun Wang, Gengkai Hu
Summary: In this study, we propose a phenomenon similar to Thouless pumping for a continuous in-plane elastic system, enabling topological transport of elastic waves through spatial modulation of material elasticity. By incorporating specific lattice microstructures, termed pentamode materials, precise and robust control over elastic wave propagation is achieved.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Linda Werneck, Mertcan Han, Erdost Yildiz, Marc-Andre Keip, Metin Sitti, Michael Ortiz
Summary: We have developed a simple model that describes the ionic current through neuronal membranes by considering the membrane potential and extracellular ion concentration. The model combines a simplified Poisson-Nernst-Planck model of ion transport through individual ion channels with channel activation functions calibrated from experimental data. The calibrated model accounts for the transport of calcium, sodium, potassium, and chloride and shows remarkable agreement with experimentally measured current-voltage curves for human neural cells.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
