Article
Chemistry, Physical
Yann Charles, Jonathan Mougenot, Monique Gasperini
Summary: The paper revisits the transient trapping model for hydrogen transport and finds that the improved formulation may lead to non-physical results in insulated systems. The McNabb and Foster trapping kinetic equation is more relevant and has a significant effect on the hydrogen distribution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Mechanical
Andrea Spagnoli, Roberto Brighenti, Matteo Montanari, Michele Terzano
Summary: This article discusses the phenomenon of large deformations that precede fracture in compliant materials, which reshapes initially sharp cracks into rounded defects. This elastic crack blunting is unique to rubber-like polymers and soft biological tissues like skin, vessel walls, and tendons. The characteristic features of the crack-tip zone and the strain-hardening behavior of soft biological tissues are analyzed through finite element analyses and experimental tests on silicone samples. A simplified geometrically nonlinear model is proposed and validated to describe the progressive blunting at the crack tip and its effect on flaw tolerance, providing a criterion for the fracture condition in nonlinear soft materials.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
Ilari Tillikainen, Pasquale Gallo, Pauli Lehto, Heikki Remes
Summary: The study investigates the relationship between crack growth rate (CGR) and cyclic crack-tip opening displacement (ΔCTOD) of microstructurally small fatigue cracks using high-resolution digital image correlation (DIC). Load-controlled fatigue tests were performed on small-scale specimens of 18%Cr ferritic stainless steel. The findings reveal that the non-linear relationship between CGR and ΔCTOD on a double logarithmic scale is caused by the crack-tip bypassing an inhomogeneous shear strain localization zone. ΔCTOD is not able to characterize the behavior of microstructurally small fatigue cracks within this zone, but remains a valid crack driving force parameter outside it.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Mechanics
Mahmoud Alneasan, Mahmoud Behnia
Summary: The study conducted experiments on the crack propagation speed of hornfels rock under quasi-static and dynamic strain rates, revealing that the crack propagation speed is influenced by loading modes and strain rates. The crack propagation path varied under different loading conditions.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Chemistry, Physical
Lidong Yin, Yin Zhang, Lianpeng Dai, Jiping Zhang, Jiajun Li, Chenchen Yang
Summary: This study investigated the impact of drilling on the dynamic properties of coal rock and found that boreholes significantly weakened the dynamic compressive strength and modulus of elasticity of coal specimens under high strain-rate loading. The number and spacing of boreholes were identified as important design parameters for weakening coal-rock material.
Article
Materials Science, Multidisciplinary
T. Ramgopal, Sandeep Chawla, Narasi Sridhar, Francois Ayello, Alexis Simon
Summary: This study focused on the SCC susceptibility and CGR behavior of three different pipeline steels in high pH carbonate/bicarbonate environments. It found that increasing temperature and low-cycle fatigue conditions lead to higher CGR. The applied potential strongly influenced the CGR behavior, and the developed model successfully predicted data under various loading conditions.
Article
Chemistry, Physical
Diogo M. Neto, Micael F. Borges, Edmundo R. Sergio, Fernando Antunes
Summary: This study numerically investigated the effect of thermal residual stresses (TRSs) on fatigue crack growth (FCG), revealing that compressive stresses delay FCG while tensile stresses accelerate it. The research also found that TRSs only affect FCG by changing the crack closure level.
Article
Chemistry, Multidisciplinary
Mengkang Xu, Xinpeng Tian, Qian Deng, Qun Li, Shengping Shen
Summary: By introducing nanocracks and applying continuously varying mechanical loading, the evolution of flexoelectricity around the crack tips in SrTiO3, Ba0.67Sr0.33TiO3, and TiO2 samples has been successfully measured. This method provides a reliable way to identify the significance of the flexoelectric effect and may open a new avenue for the study of flexoelectricity involving multiple physics phenomena such as flexoelectronics and the flexo-photovoltaic effect.
Article
Mechanics
Xiaotao Li, Mingsheng Luo, Wentao Ma
Summary: This paper presents a new theoretical model for crack-tip plasticity, suitable for bilinear strain-hardening and perfectly-plastic materials under mixed loads. The developed models are shown to be suitable for strain-hardening materials under mixed loads through comparison with finite element simulations, representing a new progression in the theoretical modeling of crack-tip plasticity.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
F. He, V. K. Thakur, M. Khan
Summary: The study emphasizes the importance of comprehensive research on the crack propagation behavior of polymeric structures fabricated using three-dimensionally printed parts. Existing studies are found to be limited in accurately assessing the true crack growth phenomenon in real applications, posing a challenge for evaluating crack growth under time-dependent coupled loading conditions.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Physical
Kwanbyung Chae, Van Tu Nguyen, Sangryun Lee, Thi Quynh Phung, Yumin Sim, Maeng-Je Seong, Sangwoon Lee, Yeong Hwan Ahn, Soonil Lee, Seunghwa Ryu, Ji- Yong Park
Summary: The mechanical stability and failures of 2D materials on compliant polymer substrates under biaxial strain are investigated. The initiation of fracture in the system is observed with crack formation in 2D materials, which propagates deep into the substrates. The properties of crack formation in systems with varying crystallinity and size of 2D materials are also studied.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Geological
Dongsheng Wen, Xinzhi Wang, Haozhen Ding, Zhibin Fu
Summary: This paper presents an error analysis of various crack initiation stress determination methods and proposes a new method for the identification of crack initiation stress by the expansion rate of axial crack strain. The results show that the proposed method can accurately identify crack initiation stress.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Manufacturing
Nazanin Pournoori, Guilherme Correa Soarea, Bratislav Lukic, Matti Isakov, Maria Clara Lessa Belone, Mikko Hokka, Mikko Kanerva
Summary: This study investigated the strain rate dependency and failure modes of carbon fiber reinforced plastic (CFRP) laminate under compressive loading. Various imaging techniques were used to measure deformation, temperature, and damage initiation and propagation. The results showed differences in damage behavior between high and low strain rates.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Binbin Meng, Chen Li
Summary: This work investigates the dynamic crack propagation mechanism of 3C-SiC at the micro-scale and the influence mechanism of the strain rate effect, with a deep analysis of the deformation mechanism under different strain rates. The simulations reveal various new phenomena, including crack nucleation, deflection and arrest, defect accumulation and evolution near the crack, and the strain rate effect on material deformation and removal. The results provide insights into the strain rate sensitivity of damage evolution and removal behaviors of monocrystalline 3C-SiC at nano- and micro-scales, and offer theoretical guidance for optimizing process parameters in the SPDT process of monocrystalline 3C-SiC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Yifei Peng, Guohu Luo, Jiayu Chen, Yongxiang Hu, Ding-Bang Xiong
Summary: In this study, graphene/copper nanolaminates were fabricated by incorporating graphene into the copper matrix, and their ballistic performance at extreme strain rates was quantified using laser-induced projectile impact tests. The specific energy dissipation of graphene/copper nanolaminates was found to be 54% higher than pure copper. Postmortem analysis revealed that graphene nanoinclusions could cause additional coordinative deformation in regions surrounding the perforation zone in graphene/copper, leading to enhanced ballistic performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Engineering, Mechanical
M. A. Kamaludin, Y. Patel, J. G. Williams, B. R. K. Blackman
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2017)
Article
Materials Science, Multidisciplinary
R. Zhang, J. Y. S. Li-Mayer, M. N. Charalambides
INTERNATIONAL JOURNAL OF FRACTURE
(2018)
Article
Engineering, Mechanical
I. Mohagheghian, M. N. Charalambides, Y. Wang, L. Jiang, X. Zhang, Y. Yan, A. J. Kinloch, J. P. Dear
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2018)
Article
Engineering, Aerospace
J. Zhou, J. Liu, X. Zhang, Y. Yan, L. Jiang, I Mohagheghian, J. P. Dear, M. N. Charalambides
AEROSPACE SCIENCE AND TECHNOLOGY
(2019)
Article
Mechanics
M. Iqbal, J. Y. S. Li-Mayer, D. Lewis, S. Connors, M. N. Charalambides
Article
Materials Science, Multidisciplinary
J. Y. S. Li-Mayer, D. Lewis, S. Connors, A. Glauser, D. M. Williamson, H. Arora, M. N. Charalambides
COMPUTATIONAL MATERIALS SCIENCE
(2020)
Article
Engineering, Chemical
Kai Jun Chen, Joseph D. Wood, Idris K. Mohammed, Shirley Echendu, David Jones, Kate Northam, Maria N. Charalambides
JOURNAL OF FOOD ENGINEERING
(2020)
Article
Engineering, Mechanical
C. G. Skamniotis, M. N. Charalambides
EXTREME MECHANICS LETTERS
(2020)
Article
Food Science & Technology
Kamal Kansou, Wim Laurier, Maria N. Charalambides, Guy Della-Valle, Ilija Djekic, Aberham Hailu Feyissa, Francesco Marra, Rallou Thomopoulos, Bert Bredeweg
Summary: This paper reviews the methods, best practices, hurdles, and limitations of knowledge transfer through software and embedded mathematical models in the food domain. The study identifies three key aspects: publishing digital objects on the web, building transferrable software through collaboration with experts and stakeholders, and developing food engineers' modeling skills through the use of software and models.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2022)
Article
Archaeology
Daniele Barbera, Christina Young, Maria Charalambides, Ambrose C. Taylor, Ruoyu Zhang
Summary: Understanding the fracture mechanisms and environmental effects on the physical properties of painted cultural heritage on wooden substrates is crucial for their preservation. Previous research has focused on individual constituent layers, but more work is needed to represent the heterogeneous composite structure of easel paintings. Fracture mechanics concepts have been applied to glue and glue/chalk multilayers, but experiments on multilayers that include oil paint are limited due to the long drying time. This paper presents a methodology using thermally aged alkyd paint for mechanical testing in easel painting reconstructions, serving as a substitute for naturally aged traditional linseed oil paint. Elastic and failure properties of the paint were obtained through controlled tensile tests. The methodology provides a viable way to study the behavior of a simplified but complete multilayer system.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Materials Science, Multidisciplinary
M. Iqbal, R. Zhang, P. Ryan, D. Lewis, S. Connors, M. N. Charalambides
Summary: Mechanical characterisation of polymer bonded explosives (PBXs) is crucial for their safe handling. This study experimentally calibrated the interfacial cohesive zone parameters of a nitrocellulose based-cyclotetramethylene tetranitramine (HMX) PBX. The cohesive zone parameters were found to be rate independent and significantly decreased with increasing temperature.
EXPERIMENTAL MECHANICS
(2023)
Article
Archaeology
R. Zhang, A. C. Taylor, M. N. Charalambides, D. S. Balint, C. R. T. Young, D. Barbera, N. Blades
Summary: Determining the storage and display conditions for historical panel paintings requires balancing preservation and energy consumption. Numerical models have been developed to simulate potential damage in panel paintings under varying humidity conditions. The models suggest that channelling cracks initiate earlier than interfacial cracks, and the annual humidity cycle has the most significant effect on crack initiation.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Food Science & Technology
Georgios Samaras, Dimitrios Bikos, Joselio Vieira, Christoph Hartmann, Maria Charalambides, Yannis Hardalupas, Marc Masen, Philippa Cann
CURRENT RESEARCH IN FOOD SCIENCE
(2020)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
