Results 21 to 30 of about 4,423 (210)

X-ray microtomographic characterization and quantification of the strain rate dependent failure mechanism in cenosphere epoxy syntactic foams [PDF]

, 2016
This work investigates the failure mechanism in cenosphere epoxy syntactic foams at the quasi-static and dynamic strain rates. Split-Hopkinson pressure bar experiments are controlled to stop dynamic deformation of the foams at various strain stages.
Adrien, Ahmadi, Awaja, Das, Dou, Gu, Huang, Huang, Kim, Kishore, Klaus, Labella, Li, Li, Li, Li, Maire, Orbulov, Pellegrino, Peroni, Song, Veseniak, Viot, Wang, Woldesenbet, Woldesenbet, Wouterson   +26 more
core   +1 more source

Briefing: UK Ministry of Defence Force Protection Engineering Programme [PDF]

, 2013
The Defence Science and Technology Laboratory sponsored, QinetiQ-led Force Protection Engineering Research Programme has two main strands, applied and underpinning research. The underpinning strand is led by Blastech Ltd.
Andrew Jardine, Andrew Tyas, Angus Williams, Jim Warren, Mihail Petkovski, Peter Gould, Philip Church, Porter D, Samuel Clarke, Stephen Kerr   +9 more
core   +1 more source

METHODOLOGY FOR COMPARISON OF HYDROCODE MODELLING WITH EXPERIMENT FOR SPLIT HOPKINSON PRESSURE BAR (SHPB) TESTING OF SOFT MATERIALS

Engineering Transactions, 2011
Summary: The objective of this work is to develop a technique for reliable comparison of simulations with SHPB data in order to validate material models for ``soft'' materials such as polymers. Comparison with an output stress-strain curve is not sufficient since there are many assumptions built into this analysis.
P. CHURCH, R. PEREIRA, P. GOULD, I. LEWTAS   +3 more
openaire   +3 more sources

Indigenous Design and Development of Split Hopkinson Pressure Bar (SHPB) test setup for characterization of materials at high strain rates

IOP Conference Series: Materials Science and Engineering, 2020
Abstract This paper presents design and development of split Hopkinson pressure bar (SHPB) indigenously for testing of different materials at high deformation rate. SHPB is capable to measure the deformation rate 100s-1 to 2,000s-1, by maintaining the uniform and uni-axial stress in the samples.
M Bilal Nutkani, Muhammad Abid, Riffat Asim Pasha, Uzair Ahmed Dar   +3 more
openaire   +1 more source

Design of a split Hopkinson pressure bar with partial lateral confinement [PDF]

, 2016
This paper presents the design of a modified split Hopkinson pressure bar (SHPB) where partial lateral con- finement of the specimen is provided by the inertia of a fluid annulus contained in a long steel reservoir.
Andrew D Barr, Andrew Tyas, Barr A D, Clarke S D, Frew D J, Gray G TIII ed Medlin D, Hallquist J O, James A Warren, Lu H, Pierce S J, Sam D Clarke, Sam E Rigby, Tyas A   +12 more
core   +1 more source

Effect of structurally-induced lateral confinement on split Hopkinson pressure bar test specimens of concrete-like materials

EPJ Web of Conferences, 2015
In dynamic testing of concrete-like materials, there is a need in distinguishing structural effects from genuine strain-rate effects. In this paper, this generic problem is studied by numerical simulations based on a phenomenological material model ...
Flores-Johnson E.A., Li Q.M.
doaj   +1 more source

Dynamic compression characteristics of layered rock mass of significant strength changes in adjacent layers

Journal of Rock Mechanics and Geotechnical Engineering, 2020
Layered rock mass of significant strength changes for adjacent layers is frequently observed in underground excavation, and dynamic loading is a prevalent scenario generated during excavation.
Sen Wen, Chunshun Zhang, Yulin Chang, Ping Hu   +3 more
doaj   +1 more source

A waveform modification method for testing dynamic properties of rock under high temperature

Journal of Rock Mechanics and Geotechnical Engineering, 2021
In this study, a waveform modification method was proposed using a self-designed heating device combined with the split Hopkinson pressure bar (SHPB) technique for determination of dynamic behaviors of rock at high temperature.
Tubing Yin, Chao Wang, You Wu, Bingqiang Wu   +3 more
doaj   +1 more source

Data processing of wave propagation in viscoelastic split Hopkinson pressure bar

AIP Advances, 2022
In this study, the polymethyl methacrylate (PMMA) bar was taken as an example to study the data processing of the viscoelastic Split Hopkinson pressure bar (SHPB) during shock wave propagation.
Jiangping Chen, Weijun Tao, Shi Huan, Chong Xu   +3 more
doaj   +1 more source

Compression of the material characteristics of steel, aluminum, wood and woven graphite epoxy composites in response to high strain rate load [PDF]

, 2012
The stresses developed in the material by impact load are analyzed experimentally, numerically, and analytically for specimens out of steel, aluminum, wood and woven graphite epoxy composites to investigate the material response to high strain rate ...
Allazadeh, M. R., Itani, M. K., Wosu, S. N.   +2 more
core   +1 more source