Results 51 to 60 of about 4,834 (220)

Investigation of copper lattice structures using a Split Hopkinson Pressure Bar

, 2022
Art. e202100155, 3 S.The paper deals with experiments on 3D printed lattices in a Split Hopkinson Pressure Bar. An energy-based evaluation of the measured wave signals enables us to compare the damping properties of two different copper lattice ...
Dehm, Gerhard, Kang, Sung Gyu, Heußen, Daniel, Bieler, Sören, Ramachandramoorthy, Rajaprakash   +4 more
core   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Numerical Simulation of Split-Hopkinson Pressure Bar Test on High-Density Polyethylene

Chemical Engineering Transactions, 2018
This paper attempts to provide new insights into the engineering application of high-density polyethylene (HDPE) under impact load and the development of HDPE materials.
Shou Chen
doaj   +1 more source

Experimental Study of the Rock Mechanism under Coupled High Temperatures and Dynamic Loads

Advances in Civil Engineering, 2020
With the development of modern society, geomaterials are widely used for infrastructure. These materials often experience dynamic loading and high temperature, which significantly influences the mechanical behaviour of the materials.
Huaming An, Tongshuai Zeng, Zhihua Zhang, Lei Liu   +3 more
doaj   +1 more source

A Comparison of Classical Constitutive Models for High‐Entropy Alloy Behavior: Effects of Medium Strain Rates and Temperature on Plastic Flow

Materials Genome Engineering Advances, EarlyView.
Four constitutive models are evaluated for FeCoNiCr and Al0.6FeCoNiCr HEAs under wide temperature and strain‐rate conditions. The predictive capabilities and limitations of each model are then critically assessed, with particular emphasis on strain rate sensitivity, temperature dependence, and physically unrealistic responses at extreme loading ...
Yooseob Song, Daniel Garcia‐Gonzalez, Tomasz Jankowiak, Alexis Rusinek   +3 more
wiley   +1 more source

Direct Measurement of Explosive Impulse From Contact to the Ultra‐Near Field

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT Measurement of impulse from explosive charges in contact and ultra‐near‐field regimes remains poorly characterised due to the short duration of loading, high strain rates, and the difficulty of obtaining direct momentum‐based measurements.
R. Alford, R. Hazael, R. Critchley, L. Humphreys   +3 more
wiley   +1 more source

High strain rate response of UHP(FR)C in compression

EPJ Web of Conferences, 2015
The objective of this study was to investigate the compression behaviour of the UHPFRC and its matrix (UHPC) under high strain rate. Two experimental set-ups were used for compression testing: a traditional Split Hopkinson Pressure Bars and a compression
Bragov Anatoly, Konstantinov Alexandr, Lomunov Andrey, Forni Daniele, Riganti Gianmario, Cadoni Ezio   +5 more
doaj   +1 more source

High strain rate compressive strength behavior of cemented paste backfill using split Hopkinson pressure bar

International Journal of Mining Science and Technology, 2021
The stability of cemented paste backfill (CPB) is threatened by dynamic disturbance, but the conventional low strain rate laboratory pressure test has difficulty achieving this research purpose.
Xin Chen, Xiuzhi Shi, Jian Zhou, Enming Li, Peiyong Qiu, Yonggang Gou   +5 more
doaj   +1 more source

Targeting Orexin 2 Receptors in Idiopathic Hypersomnia and Narcolepsy: A Randomised Phase 1b Proof‐Of‐Concept Study of Alixorexton

Journal of Sleep Research, EarlyView.
Orexin 2 receptor agonists have demonstrated that targeting the orexin system may address symptoms of central disorders of hypersomnolence. Results of this phase 1 study support the phase 2 clinical evaluation of oral alixorexton in patients with IH, NT2 and NT1.
Ronald R. Grunstein, Brendon J. Yee, Julia L. Chapman, Jian Eu Tai, Sheila Sivam, Craig Hopkinson, Daniel G. Smith, Alexandra Lovett, Shifang Liu, Sergey Yagoda, Bhaskar Rege   +10 more
wiley   +1 more source

Design of a Split Hopkinson Pressure Bar facility for dynamic material characterization

, 2019
It is important to know the mechanical response of materials over a full range of strain rates. In machining and stamping, or in ballistic type events such as bullet penetration, shell impacts, and explosive blasts, strain rates of 100 s-1 to 10,000 s-1 ...

core   +1 more source