Article
Mining & Mineral Processing
Xin Chen, Xiuzhi Shi, Jian Zhou, Enming Li, Peiyong Qiu, Yonggang Gou
Summary: The research utilized SHPB to test the high strain rate compressive behavior of cemented paste backfill (CPB). The results showed that increasing the cement content, tailings content, and curing age can improve the dynamic compressive strength and elastic modulus of CPB. Under dynamic loading, higher strain rates lead to larger increasing times of dynamic compressive strength, and there is an exponential correlation between dynamic compressive strength of CPB and strain rate.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
A. Lew, O. T. Kingstedt
Summary: This article introduces an experimental setup that allows for precisely-controlled high-rate heating of metallic material systems to study their behavior under high-temperature high-strain-rate conditions. This is important for improving understanding of material behavior during high-speed machining, forging, high-velocity vehicle crashes, protection system response to impacts and blast, as well as nuclear energy applications.
EXPERIMENTAL MECHANICS
(2022)
Article
Polymer Science
Xintao Zhu, Xiaojing Zhang, Wenjin Yao, Wenbin Li
Summary: Using a split-Hopkinson pressure bar test instrument with temperature control, this study tested the dynamic mechanical properties of silicone rubber at different temperatures and strain rates. The results showed that silicone rubber is sensitive to both strain rate and temperature, with the yield strength increasing with higher strain rates and showing temperature sensitivity at higher rates.
Article
Materials Science, Multidisciplinary
Manish Kumar Gupta
Summary: The study of high strain rate characteristics is essential for understanding the behavior of materials in dynamic conditions, which can be done through experimental techniques or finite element simulations. The results show that the amplitude and duration of waves depend on the parameters of the striker.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Geosciences, Multidisciplinary
Zhoujie Gu, Rongxi Shen, Zhentang Liu, Enlai Zhao, Hailiang Chen, Zichen Yuan, Xiaomeng Chu, Jiawei Tian
Summary: Dynamic failure experiments were conducted on coal samples under dynamic load in a triaxial Split-Hopkinson pressure bar test system to study the dynamic characteristics of coal in a multi-axial pre-stress state. The experiments showed that the 3D pre-stress state significantly affects the dynamic failure of coal. The dynamic initial stress of coal increases linearly with strain, then grows at a reduced rate until the peak strength, and the mechanical curve rebounds notably. The dynamic strength factors of coal vary significantly with the increase of confining pressure.
NATURAL RESOURCES RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Markus Felten, Michael Fries, Tomas Fila, Petr Zlamal, Jan Falta, Ondrej Jirousek, Anne Jung
Summary: Open-cell metal foams are porous lightweight materials mainly used for kinetic energy absorption, with the ability to significantly reduce the mass of structural designs. Manufactured by electrochemical nickel (Ni) deposition, these metal foams exhibit good mechanical properties adjustment capability.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Mechanical
Yifei Meng, Yuting Yang, Weibin Wang, Qingbo Dou, Tao Suo
Summary: An improved high-temperature dynamic torsion experimental method was developed in this study, utilizing an electromagnetic torsional Hopkinson bar equipped with a special system and proposing a double-flange thin-walled tubular specimen, achieving online heating and synchronous assembly successfully. This provides a new approach for studying the shear mechanical properties of materials under high strain rates and high temperatures.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Yifei Meng, Yuting Yang, Weibin Wang, Qingbo Dou, Tao Suo
Summary: This study developed an improved high-temperature dynamic torsion experimental method for determining the shear mechanical properties of materials under the coupling effect of high strain rates and high temperatures. By optimizing the specimen design and strain measurement correction method, the accuracy and reliability of the tests were improved. Experimental results demonstrated the suitability of this method for strain rate testing at different temperatures.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Computer Science, Software Engineering
Tzvi Gershanik, Itay Levin, Daniel Rittel
Summary: 2BarG is a Python-based program that analyzes Split Hopkinson Pressure Bar experiments. It features automatic signal identification and a user-friendly interface, allowing for fast, simple, and efficient data processing.
Article
Chemistry, Physical
Tobias Werling, Georg Baumann, Florian Feist, Wolfgang Sinz, Christian Ellersdorfer
Summary: This study investigated the mechanical behavior of high-voltage busbars under high strain rate loading using a split Hopkinson pressure bar. Two types of busbars were tested, revealing that polyamide 12 insulated busbars have increased safety regarding insulation failure at high loading speeds, while fiber-reinforced polyamide 6 insulated busbars exhibit highly brittle material behavior. The experimental results were complemented with a strain rate-dependent model for thermoplastics, achieving good agreement with the behavior observed.
Article
Construction & Building Technology
Baofeng Huang, Xiangfei Zhang, Xiaofeng Ma
Summary: The uniaxial compression behavior of building sandstone at high strain rates is investigated using dynamic and static compression tests. It is found that the static compression strength of flattened cylinders is 50% higher than that of standard cylinders. The study also explores the relationship between strain rate and fracture damage, and analyzes the correlations between dynamic strength, strain rate, and dynamic modulus based on experimental results.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Marine
Biao Su, Xiongliang Yao, Ning Gan, Pengrong Wang, Xiongwei Cui
Summary: This study introduces a high speed water jet generation device based on explosion in a cylindrical cavity, which can eject a well-characterized water jet with a velocity around 100 m/s. The evolution characteristics and impact phenomenon of the water jet on a rigid target are observed, and the impact load is measured using a Hopkinson pressure bar.
Article
Nanoscience & Nanotechnology
Selim Kim, Hyungu Kang, Minu Kim, Ki Jong Kim, Jae Min Lee, Hae-Won Cheong, Hyoung Seop Kim, Sunghak Lee
Summary: This study suggests that stacks of thin aluminum sheets with fine rectangular or triangular grooves are effective materials for energy absorption. The energy-absorbing performance of these materials was evaluated using a modified split Hopkinson pressure bar (SHPB). The study found that the grooves shape, groove cavity fraction, and specimen thickness affect the energy-absorbing parameters, including impact momentum and maximum impact acceleration. Both impact momentum and maximum impact acceleration showed a continuous decrease as the specimen thickness increased or as the groove cavity fraction increased. The triangular grooved specimens exhibited greater reduction in impact momentum compared to the rectangular grooved specimens. The overall energy-absorbing performance of the triangular grooved specimens was better than that of the rectangular grooved specimens. Notably, in the triangular grooved specimens with a high cavity fraction, the triangular embossing intruded into the groove cavities, resembling a 'zipper' mechanism, further enhancing the effectiveness of energy absorption. This study presents a promising approach for developing grooved aluminum sheet stacks with reduced impact momentum and maximum impact acceleration by exploring suitable groove shapes, cavity fractions, and stack thicknesses, especially in dynamically compressed artillery environments.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Janis S. Kimm, Jim A. Bergmann, Florian Woeste, Fabian Poehl, Petra Wiederkehr, Werner Theisen
Summary: This research conducted Split-Hopkinson pressure bar tests on quenched and tempered steel 42CrMo4 in different heat-treatment conditions to explore the deformation characteristics and the influence of microstructure on deformation. It provides a detailed understanding of the deformation of 42CrMo4 steel under various parameter values.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Selim Kim, Min Cheol Jo, Dong Woo Suh, Hong Kyu Kim, Seok Su Sohn, Sunghak Lee
Summary: This study investigated the dynamic compressive properties of a high-strength bainitic steel with different austempering times, finding that the specimen austempered for 90 min exhibited the highest volume fraction of retained austenite (RA) and compressive properties. It showed high resistance to the formation of transformation-ASB (tASB) due to the active deformation-induced martensitic transformation of RA. The critical strain concept, correlated with dynamic compressive properties, was identified as an important factor in suppressing ASB formation and improving ballistic performance.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
