Article
Physics, Multidisciplinary
Shin Takeuchi, Keiichi Edagawa, Yasushi Kamimura
Summary: The critical shear stress of small-sized metallic crystals fabricated from bulk crystals increases drastically with decreasing specimen diameter, following a universal power law relationship. This relationship was successfully reproduced in the study without any adjustable parameters, based on a deformation process controlled by the operation of single-ended dislocation sources.
PHYSICAL REVIEW LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Weina Wang, Qingxia Yue
Summary: In this paper, the time variation law of the compressive strength of concrete was reviewed from three aspects: single, multiple and material internal factors. The mathematical models of compressive strength relative to time under single factors and the coupling effects of multiple factors were summarized. The differences in time variation models of compressive strength in existing buildings were discussed, and the influences of concrete internal factors on compressive strength were outlined.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Z. P. Gu, Y. J. Cheng, K. L. Xiao, K. Li, X. Q. Wu, Q. M. Li, C. G. Huang
Summary: This paper obtains a geometrical scaling law of launch velocity for Laser-induced micro-projectile impact testing (LIPIT) with relative thick metallic film using dimensional analysis, experimental measurements, and numerical simulations. The numerical simulation models of the LIPIT are established and validated by experimental results, providing a numerical validation for the geometrical scaling laws. The dimensionless formulas for predicting the launch velocities of micro-projectiles in a LIPIT are given, providing an effective method for analyzing and optimizing the LIPIT experiments.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Geological
Changtai Zhou, Heping Xie, Zhihe Wang, Tao Zhou, Jianbo Zhu
Summary: The scaling behaviors of rocks are significant in practical engineering for the stability and safe operation of structures built on or in rock masses. However, limited works have considered the strain rate effect. In this study, a fractal-statistical scaling model incorporating strain rate is proposed, which can capture the scaling behaviors under different external conditions. The model has been validated with experimental data on red sandstone, showing its reliability and effectiveness. The sensitivity analysis indicates that factors such as strain rate, fractal dimension, micro-crack size, and micro-crack intensity have an influence on the nominal strength difference. Thus, the proposed scaling model has the potential to capture the scaling behaviors considering various factors.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Sihan Liu, Ke Duan, Jiuan Feng, Li Li, Xuelin Wang, Yujin Hu, Zhao Qin
Summary: Understanding the structure-mechanics relationships in cellular solids is crucial for achieving better mechanics using the same material. In this study, multiscale modeling and computation were employed to investigate the mechanics of hierarchical carbon nanoarchitectures. The density was found to primarily determine the Young's modulus and tensile strength of the graphene network. Additionally, different scaling laws for compressive strength were observed and attributed to various features of the constituent struts.
Article
Construction & Building Technology
Chi-Cong Vu, Ngoc-Khoa Ho, Thuy-An Pham
Summary: This study, based on extensive experimental research on concrete specimens and cores, reveals that concrete exhibits a size-dependent behavior in terms of compressive strength regardless of specimen size and mix proportion. However, the relationship between compressive strength of cylindrical molded and cored concrete specimens is not significantly impacted by sample size. Additionally, the influences of sample and aggregate sizes on compressive strength decrease with increasing specimen size, suggesting that very large concrete samples have a constant strength. The use of Weibull statistics is irrelevant in interpreting the statistical size effect on compressive strength of concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Multidisciplinary Sciences
Olga Shishkov, Claudia Chen, Claire Allison Madonna, Kaushik Jayaram, Orit Peleg
Summary: To understand how swarms of bees maintain mechanical stability during colony reproduction, researchers conducted the first-ever 3D reconstructions of the bee positions in the swarm using x-ray computed tomography. They found that the mass of bees in a layer decreases with distance from the attachment surface, and discovered that a power law governs the weight distribution within swarms of different sizes. This power law ensures that each layer exerts the same proportion of its total strength, allowing bees to support lower weight than their maximum grip strength.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Composites
Sachin R. Vankar, Ameya N. Kaore, Chandra S. Yerramalli
Summary: Unidirectional (UD) composites with 0 degrees fibre orientation have high axial strength, but compressive testing along the fibre direction is challenging due to misalignment, buckling, non-uniform gripping, and stress distribution. Existing fixtures for compressive testing are not suitable for cylindrical pultruded composites. This paper presents a methodology and fixture for testing the compressive strength of pultruded cylindrical composites, addressing alignment, gripping, and stress concentration issues.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Ecology
Alexander B. Brummer, Van M. Savage
Summary: This study establishes the metabolic scaling relationship between tumor metabolism and volume in lung cancer patients, and examines how the branching geometry of tumor-supplying blood vessel networks influences this phenomenon.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Review
Construction & Building Technology
Hemraj R. Kumavat, Narayan R. Chandak, Ishwar T. Patil
Summary: Non-destructive testing plays a vital role in determining the surface hardness of concrete members, with the B-Proceq curve providing statistical correlations between destructive and non-destructive strength. While regression curves based on laboratory tests may be valid within certain boundaries, extending their validity to in-situ tests is not feasible. Factors such as w/c ratio, carbonation effect, exposure to fire, compaction, curing conditions, and type of cement used in concrete all influence these curves.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Huai Liu, Wu Jing, Lingling Qin, Ping Duan, Zuhua Zhang, Rui Guo, Wanlin Li
Summary: The study focused on the thermal stability of metakaolin-based geopolymer blended with glass powder and rice husk ash, showing improved properties after high-temperature treatment. The addition of glass powder and rice husk ash improved the Si/Al ratio and SiO2/Na2O ratio of geopolymer, while also contributing to the healing of microcracks.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Riikka Matala, Mikko Suominen
Summary: Climate warming poses higher requirements for sustainability in the ship industry, leading to stricter power restrictions and the development of new ship hull designs. However, current model scale testing principles for predicting vessel's ice performance are suboptimal, especially for vessels operating in old, frequently used brash ice channels. This paper introduces a new similitude number - the Channel number - to more accurately predict ship resistance in brash ice conditions and enhance harmonization of ice performance with ice classes.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
T. Charles Mahutjane, Thandiwe N. Sithole, Leonel N. Tchadjie
Summary: The study evaluated the feasibility of using sewage sludge to synthesize geopolymer cement. It was found that calcining the sludge increased the geopolymer reactivity and improved the mechanical and physical properties of the geopolymer composites. The geopolymer mortar made from sewage sludge ash can be utilized in various construction applications without environmental contamination.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
In-Kyu Kang, Sun-Hee Kim
Summary: This study conducted experiments and numerical analysis on the compressive strength of fiber-reinforced polymer tubes, finding that the compressive strength of concrete-filled fiber-reinforced polymer tubes improved under the effect of filament winding technology, and also revealed some existing errors.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Lihong Chang, Wei Qian, Hao Chang, Xiaohong Chang, Taoping Ye
Summary: The wave-drag modulus nondestructive testing method accurately predicts the compressive bearing capacity of damaged wood components and highlights that internal insect damage is more destructive than internal cavities. The research findings provide crucial insights for assessing the material condition of wood components in ancient buildings.
Article
Chemistry, Multidisciplinary
Seok-Woo Lee, Mehdi Jafary-Zadeh, David Z. Chen, Yong-Wei Zhang, Julia R. Greer
Article
Materials Science, Multidisciplinary
Haibo Yu, Yu Sun, William R. Meier, Paul C. Canfield, Christopher R. Weinberger, Seok-Woo Lee, Mark Aindow
JOURNAL OF MATERIALS SCIENCE
(2018)
Article
Nanoscience & Nanotechnology
John T. Sypek, Christopher R. Weinberger, Sriram Vijayan, Mark Aindow, Sergey L. Bud'ko, Paul C. Canfield, Seok-Woo Lee
SCRIPTA MATERIALIA
(2017)
Article
Materials Science, Multidisciplinary
Keara G. Frawley, Ian Bakst, John T. Sypek, Sriram Vijayan, Christopher R. Weinberger, Paul C. Canfield, Mark Aindow, Seok-Woo Lee
Article
Materials Science, Multidisciplinary
Gyuho Song, Tai Kong, Keith J. Dusoe, Paul C. Canfield, Seok-Woo Lee
JOURNAL OF MATERIALS SCIENCE
(2018)
Article
Materials Science, Multidisciplinary
Seok-Woo Lee, Andrew T. Jennings, Julia R. Greer
Article
Materials Science, Multidisciplinary
Andrew T. Jennings, Christopher R. Weinberger, Seok-Woo Lee, Zachary H. Aitken, Lucas Meza, Julia R. Greer
Article
Physics, Applied
Seok-Woo Lee, Lucas Meza, Julia R. Greer
APPLIED PHYSICS LETTERS
(2013)
Article
Engineering, Multidisciplinary
Seok-Woo Lee, Cheng YinTong, Ill Ryu, Julia R. Greer
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2014)
Article
Nanoscience & Nanotechnology
Jie Lian, Seok-Woo Lee, Lorenzo Valdevit, Michael I. Baskes, Julia R. Greer
SCRIPTA MATERIALIA
(2013)
Article
Multidisciplinary Sciences
Sumit Suresh, Seok-Woo Lee, Mark Aindow, Harold D. Brody, Victor K. Champagne, Avinash M. Dongare
SCIENTIFIC REPORTS
(2018)
Article
Nanoscience & Nanotechnology
Gyuho Song, Vladislav Borisov, William P. Meier, Mingyu Xu, Keith J. Dusoe, John T. Sypek, Roser Valenti, Paul C. Canfield, Seok-Woo Lee
Article
Materials Science, Multidisciplinary
John T. Sypek, Sriram Vijayan, Ian Bakst, Shuyang Xiao, Matthew J. Kramer, Paul C. Canfield, Mark Aindow, Christopher R. Weinberger, Seok-Woo Lee
Summary: The micropillar compression experiments on [001]-oriented CaFe2As2 single crystals have shown the existence of superelasticity with a high elastic limit. The collapsed tetragonal phase transition, influenced by microstructure and temperature, is the main mechanism of superelasticity. Factors like vacancies and nanoprecipitates affect the mechanical behavior significantly, and the onset stress for the phase transition decreases with decreasing temperature.
Article
Materials Science, Coatings & Films
A. A. Hemeda, A. Mishra, J. Xu, C. T. Wu, D. Cote, M. Siopis, I. M. Nault, V. K. Champagne, S-W Lee, M. Aindow, A. Nardi, J. W. Palko, Y. Ma
Summary: In this paper, the micromechanical performance of Al6061 single-particle deposition by a cold spray process is studied using an axisymmetric smoothed particle hydrodynamic approach. The study shows that the yield strength at the particle-substrate interface is two to three times greater than that in the bulk, and there are heterogeneous mechanical properties in the splat and along the splat-substrate interface.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Zhongyuan Li, Jinlong He, Ashwanth Subramanian, Nikhil Tiwale, Keith J. Dusoe, Chang -Yong Nam, Ying Li, Seok-Woo Lee
Summary: In this study, core-shell SU-8 nanocomposites fabricated via vapor-phase infiltration of nanoscale amorphous aluminum oxides showed an ultrahigh modulus of resilience much higher than most high-strength materials. The unique microstructural features, including the low aspect ratio of aluminum oxide nanoparticles, the larger particle size compared to the free volume size, and the thin interconnecting links within the particles, contribute to the exceptional combination of low specific Young's modulus and high specific yield strength, resulting in a specific modulus of resilience about ten times higher than materials with similar yield strength. The vapor-phase infiltration method demonstrated excellent capabilities in producing polymer nanocomposites that can absorb and release large amounts of elastic strain energy.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Nizar Lefi, Salem Neily, Roland Bonnet
Summary: This paper investigates the elastic field in a bi-material crystal with an angular dislocation line with one branch placed in the crystal and the other along a strongly bound or welded interface. The analysis formulates the elastic field of a closed dislocation loop and solves it using the knowledge of the Green's tensor of the bi-material. The study provides a faster calculation method and has important implications for solving interfacial angular dislocation problems.
PHILOSOPHICAL MAGAZINE
(2024)