Results 191 to 200 of about 6,089 (210)

Dynamic Compression Test of CFRP Laminates Using SHPB Technique

Applied Mechanics and Materials, 2014
A novel experimental method was proposed for characterizing the compressive properties of composite materials under impact loading. Split Hopkinson pressure bar system was employed to carry out the dynamic compression tests. The dynamic stress-strain relations could be precisely estimated by the proposed method, where the ramped input, generated by the
Takayuki Kusaka, Takanori Kono, Yasutoshi Nomura, Hiroki Wakabayashi   +3 more
openaire   +1 more source

High-temperature dynamic deformation of aluminum alloys using SHPB

Journal of Mechanical Science and Technology, 2011
This paper investigates the dynamic deformation behavior of two aluminum alloys, 2024-T4 and 6061-T6, using a modified split Hopkinson pressure bar (SHPB) with a pulse shaper technique at both elevated and room temperatures. An experimental strategy is proposed, and the dynamic deformation behaviors of two alloys are evaluated with the modified high ...
Ouk Sub Lee, HyeBin Choi, HongMin Kim
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SHPB tests for mechanical behavior of lead-free solder alloys

SPIE Proceedings, 2008
Dynamic behavior of solder joints in microelectronic packages is key issue for drop/impact reliability design of mobile electronic products. The dynamic mechanical behavior of 63Sn37Pb, 96.5Sn3.5Ag and 96.5Sn3.0Ag0.5Cu at high strain rates have been investigated by using the split Hopkinson pressure/tension bar testing technique (SHPB). Stress-strain
Fei Qin, Tong An, Na Chen
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Material behaviour characterisation using SHPB techniques, tests and simulations

Computers & Structures, 2003
Abstract The split Hopkinson pressure bar technique is extensively used to characterise material behaviour at high strain rates. In this paper, this technique is re-examined in order to optimise its accuracy, to improve its capacity and to develop innovating applications. The accuracy of the basic SHPB measurements which are forces and velocities at
openaire   +1 more source

Simulating Wave Propagation in SHPB with Peridynamics

Split Hopkinson’s pressure bar (SHPB) is commonly used for characterizing materials at high strain rates. In obtaining an admissible stress–strain curve at a specific strain rate, force equilibrium through the specimen is required. Due to the blunt collision between the striker bar and the incidence bar in SHPB, a strain wave with a blunt wave front is
Tao Jia, Dahsin Liu
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Numerical Simulation of SHPB Test for Concrete under Confining Pressure

Applied Mechanics and Materials, 2014
Using the HJC dynamic constitutive model, the Split Hopkinson Pressure Bar (SHPB) impact test with confining pressure for concrete was simulated in the software ANSYS/LS-DYNA. The confining pressure was simulated by applying constant pressure around the specimen. The triangle velocity wave, which has less diffusion, is used as loader in the simulation.
Hua Zhang, Ao Yu Xie, Yu Wei Gao
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Experimental study for friction effect investigation on SHPB

2001
The paper presents an investigation on SHPB behaviour used for material characterisation in compression testing at high strain rate. Material flow stress determined with the SHPB test is affected by radial and axial inertia as well as friction. The particular topics treated are the effects of friction between specimen and bars interfaces on the flow ...
BERTI, GUIDO, BARIANI, PAOLO FRANCESCO, CORAZZA S.   +2 more
openaire   +1 more source

Optimal Pulse Shapes for SHPB Tests on Soft Materials

For split Hopkinson pressure bar (SHPB) tests on soft materials, the goals of homogeneous deformation and uniform uniaxial stress in the specimen present experimental challenges, particularly at higher strain rates. It has been known for some time that attainment of these conditions is facilitated by reducing the thickness of the specimen or by ...
Mike Scheidler, John Fitzpatrick, Reuben Kraft   +2 more
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Wave shaping by special shaped striker in SHPB tests

2011
The split Hopkinson pressure bar has been a very popular and promising experimental technique for the study of dynamic behaviours of metallic materials for its easy operation and relatively accurate results, with three basic assumptions (Davies and Hunter, 1963; Bazle, Sergey and John, 2004): (a) waves propagating in the bars can be described by the ...
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Investigating Uncertainty in SHPB Modeling and Characterization of Soft Materials

The increasing use of soft materials in industrial, commercial and military applications has necessitated a more thorough understanding of their visco-hyperelastic, reactive, and other non-linear properties. Additionally, testing and design methods for components that employ these materials have required innovation.
Christopher Czech, Aaron J. Ward, Hangjie Liao, Weinong W. Chen   +3 more
openaire   +1 more source