22 papers · ranked by Valyu relevance
Zhe Zhang, Xiaoyu Song
Cracks in clay are significant in geotechnical and geoenvironmental engineering (e.g., embankment erosion and stability of landfill cover systems). This article studies the mechanism of nucleation and growth of cracks in clay at the nanoscale through full-scale molecular dynamics simulations. The clay adopted is…
Karolina Tomaszkiewicz, Tomasz Owerko
Monitoring of structures’ condition plays a fundamental role in providing safety for users and extending the structures’ lifespan. The monitoring is conducted through on-site inspections by engineers thus this process is time-consuming, labor-intensive and prone to subjective engineering opinions. Detecting damage…
Authors not listed
To understand fracture behaviour in battery materials, X-ray computed tomography (X-ray CT) has become the primary technique for non-destructive particle analysis. Cracking causes performance decline in polycrystalline NMC811 by exposing new surfaces for parasitic electrolyte reactions and disconnecting active material…
Xiaoqing Zhang, Jialin Wang, Zhijian Yi, Tuo Zhang + 3 more
Reinforced concrete (RC) structures are susceptible to crack initiation and propagation during service, making accurate numerical simulation of crack behavior essential for assessing structural durability and safety. Current numerical approaches for simulating concrete cracking include smeared/continuum approaches…
Meng Wang, Mokhtar Adda-Bedia, John M. Kolinski, Jay Fineberg
Griffith's energetic criterion, or 'energy balance', has for a century formed the basis for fracture mechanics; the energy flowing into a crack front is precisely balanced by the dissipation (fracture energy) at the front. If the crack front structure is not properly accounted for, energy balance will either appear to…
Moritz Knoche, Loise Grosset-Grange, José Quero-García, David Alletru + 2 more
'David Alletru' 'Lina Boutaleb' 'Ali Akbar Ghasemi-Soloklui'] Rain cracking compromises quality and quantity of sweet cherries worldwide. Cracking susceptibility differs among genotypes. The objective was to (1) phenotype the progeny of a cross between a tolerant and a susceptible sweet cherry cultivar for cuticle mass…
Pierre Rossi, Xiaoqing Xu, Xiaowei Deng
This paper focuses on the use of numerical tools, as a finite elements method, to conceive fiber reinforced concrete (FRC) eco-constructions. It highlights the fact that these are the most suitable tools (much more than the Eurocodes, for example) to predict the cracking process of FRC constructions at their service…
Authors not listed
Mesoporosity and extra-framework aluminum (EFAL) species often form during post-treatment of Y-type zeolites, such as steaming or dealumination, and can significantly influence catalytic performance in fluid catalytic cracking (FCC). However, their individual effects on Brønsted acidity and intrinsic catalytic activity…
Hongmei Liu, Faxu Li, Jingqiang He, Wenlong Wang + 1 more
To address severe equipment vibration and large load fluctuations during hard-rock excavation, this study proposes mechanical pre-cracking as a preparatory treatment. A hard-rock model containing pre-cracked holes is developed using the discrete element method; the crack initiation and propagation induced by a…
Hassan Saad, Thierry Douillard, Annie Malchère, Philippe Steyer + 3 more
Nacre-like aluminas are bio-inspired, ceramic-based composites that display high toughness and strength. Their toughness arises from their brick-and-mortar microstructure. We must understand the role of several microstructural features over their mechanical properties. Techniques that allow microstructural imaging…
R. A. I. Haque, Tapati Dutta
porous materials: A precursor to crack percolation Authors: ['R. A. I. Haque' 'Tapati Dutta'] The crack statistics of a 3-dimensional disordered porous material subjected to constant axial compressive loading have been investigated with regard to the elastic properties of the system. While cracking is a complex…
Csanád Szuszik, Ian G. Main, Ferenc Kun
We test the hypothesis that loading conditions affect the statistical features of crackling noise accompanying the failure of porous rocks by performing discrete element simulations of the tensile failure of model rocks and comparing the results to those of compressive simulations of the same samples. Cylindrical…
Lydia V. Luncz, Nora E. Slania, Katarina Almeida-Warren, Susana Carvalho + 5 more
The archaeological record offers insights into our evolutionary past by revealing ancient behaviour through stone and fossil remains. Percussive foraging is suggested to be particularly relevant for the emergence of tool-use in our lineage, yet early hominin percussive behaviours remain largely understudied compared to…
Theo D. R. O’Malley, Jonathan S. Reeves, Nora E. Slania, Tiago Falótico + 3 more
Identifying the conditions that facilitate tool use is a central focus in the field of human evolution and animal behavior. Particular interest lies in studying stone tool use by non-human primates, especially when stone hammers are used to open encased food sources. Percussive tool use is a rare and complex…
Nicolas Brantut, Léo Petit
Under compressive stress, rock "damage" in the form of tensile microcracks is coupled to internal slip on microscopic interfaces, such as preexisting cracks and grain boundaries. In order to characterise the contribution of slip to the overall damage process, we conduct triaxial cyclic loading experiments on Westerly…
S. Berdugo, E. Cohen, A. J. Davis, T. Matsuzawa + 1 more
Using tools to access hard-to-reach and high-quality resources, such as termites, honey, and nuts, initiated a fundamental adaptive shift in human and nonhuman primate cognitive and behavioural evolution. Variation in the efficiency of extracting calorie-rich and nutrient-dense resources directly impacts energy…
Olivia Ward, Aditya Kumar
Predicting the growth of large cracks in brittle materials is a fundamental unresolved problem in fracture mechanics. Under out-of-plane shear loading, an initially planar crack may fragment into multiple cracks, forming an echelon crack pattern. Explaining this phenomenon is essential for developing a general theory…
E Howard-Spink, T Matsuzawa, S Carvalho, C Hobaiter + 3 more
We know vanishingly little about how long-lived apes experience senescence in the wild, particularly with respect to their foraging behaviors, which are essential for survival. Some wild apes use tools during foraging and, given the additional cognitive and physical challenges presented by tool use, we predict that…
Authors not listed
Electro-chemo-mechanical degradation pathways which significantly impact performance of ceramic (e.g., LiCoO2) battery electrodes are a strong function of bulk crystallographic texture, crystal size and interfacial misorientation angle. Via electrodeposition, deterministic synthesis of textured thick (>10 µm) films of…
Authors not listed
The recent discovery of the self-healing capabilities of molecular crystals has shown significant efficiency, approaching nearly 100%, particularly when this process is coupled with a phase transition. This places these materials on par with other, better-studied soft materials, such as polymers. However, the physical…
Suraj Reddy
This paper presents a deeper understanding of the effect of interface orientation and varying defect density within the interface on toughness in 2D media. Our study focuses on a pre-deflected crack that has a majority of its length parallel to the line of symmetry in the horizontal direction, with a small deflected…
Authors not listed
Power and energy density represent a trade-off in design of lithium-ion batteries. This is because for high energy density thick electrodes are required, and for high power density thin electrodes are required. A strategy to break this trade-off is to develop electrodes with regions of low tortuosity (e.g. cracks or…