Journal ArticleDOI
Dynamic characterization of compliant materials using an all-polymeric split Hopkinson bar
TLDR
In this article, an all-polymeric split Hopkinson bar (APSHB) experiment was proposed for measuring high strain rate properties of high-strength materials, such as polycarbonate, polyurethane foam and styrofoam.Abstract:
The split Hopkinson bar is a reliable experimental technique for measuring high strain rate properties of high-strength materials. Attempts to apply the split Hopkinson bar in measurement on more compliant materials, such as plastics, rubbers and foams, suffer from limitations on the maximum achievable strain and from high noise-to-signal ratios. The present work introduces and all-polymeric split Hopkinson bar (APSHB) experiment, which overcomes these limitations. The proposed method uses polymeric pressure bars to achieve a closer impedance match between the pressure bars and the specimen materials, thus providing both a low noise-to-signal ratio data and a longer input pulse for higher maximum strain. The APSHB requires very careful data reduction procedures because of the viscoelastic behavior of the incident and transmitter pressure bars. High-quality stress-strain data for a variety of compliant materials, such as polycarbonate, polyurethane foam and styrofoam, are presented.read more
Citations
More filters
Journal ArticleDOI
Tension and compression tests of two polymers under quasi-static and dynamic loading
Weinong Chen,F. Lu,M. Cheng +2 more
TL;DR: In this paper, a split Hopkinson tension bar was modified for the dynamic tensile stress-strain behavior of the low-strength and low-mechanical-impedance specimens.
Journal ArticleDOI
High Strain Rate Mechanics of Polymers: A Review
Clive R. Siviour,Jennifer Jordan +1 more
TL;DR: In this article, a review of the methods for dynamic loading of polymers is presented, where the high strain rate mechanical properties of several polymers, i.e. glassy and rubbery amorphous polymers and semi-crystalline polymers are reviewed.
Journal ArticleDOI
Oscillation elimination in the Hopkinson bar apparatus and resultant complete dynamic stress-strain curves for rocks
TL;DR: In this article, an improved experimental approach for eliminating oscillation that exists in the dynamic stress-strain response of rocks and other brittle materials obtained from tests using a split Hopkinson pressure bar (SHPB).
Journal ArticleDOI
Dynamic stress equilibration in split Hopkinson pressure bar tests on soft materials
Bo Song,Weinong Chen +1 more
TL;DR: In this paper, an integrated experimental/analytical study has been conducted to examine the process of dynamic stress equilibrium in a soft rubber specimen, and an analytical model was employed to analyze the equilibrating processes observed in experiments.
Journal ArticleDOI
Dynamic Compression Testing of Soft Materials
TL;DR: In this paper, the shape of the incident pulse and the specimen thickness must be designed such that the specimens are in dynamic equilibrium and deform homogeneously at constant strain rates, and a sensitive transmission bar is required to detect the weak transmitted pulses.
References
More filters
Book
Wave Motion in Elastic Solids
TL;DR: In this article, a comprehensive study of elastic wave propagation in solids is presented, ranging from the theory of waves and vibrations in strings to the three-dimensional theory of elastic waves in thick plates.
Book
Dynamic Behavior of Materials
TL;DR: In this paper, the authors present a method to produce dynamic deformation at high strain rates by using Shear Bands (Thermoplastic Shear Instabilities) and dynamic fracture.
Journal ArticleDOI
An Investigation of the Mechanical Properties of Materials at very High Rates of Loading
TL;DR: In this article, a method of determining the stress-strain relation of materials when stresses are applied for times of the order of 20 microseconds is described, using a modification of the Hopkinson pressure bar and detonators were used to produce large transient stresses.
Journal ArticleDOI
On the use of SHPB techniques to determine the dynamic behavior of materials in the range of small strains
Han Zhao,Gérard Gary +1 more
TL;DR: In this article, the accuracy of the basic measurements of forces and velocities at both sample faces is discussed concerning the early stage of the loading and a more precise wave dispersion correction and a new method to set exact origins of waves are then proposed.
Journal ArticleDOI
On the use of a viscoelastic split hopkinson pressure bar
TL;DR: In this paper, a detailed study of the technical problems of such a viscoelastic setup related to the measurement and to the loading conditions is offered on the basis of the three-dimensional (3D) Fourier stationary harmonic wave analysis.