Parametric identification for material of viscoelastic SHPB from wave propagation data incorporating geometrical effects

Butt, Hafiz Sana Ullah; Xue, Pu; Jiang, Tao; Wang, Bin

doi:10.1016/j.ijmecsci.2014.06.003

Cited by 26 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…titanium, magnesium alloy or aluminum, or a polymer, e.g. polymethylmethacrylate (PMMA), PC, or nylon [77][78][79][80][81][82][83][84][85][86][87][88]. Low impedance metallic bars do not require any changes to the experimental apparatus or data reduction.…”

Section: Dynamic Loading: Split Hopkinson Pressure Barmentioning

confidence: 99%

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

286

121

View full text Add to dashboard Cite

The mechanical properties of polymers are becoming increasingly important as they are used in structural applications, both on their own and as matrix materials for composites. It has long been known that these mechanical properties are dependent on strain rate, temperature, and pressure. In this paper, the methods for dynamic loading of polymers will be briefly reviewed. The high strain rate mechanical properties of several classes of polymers, i.e. glassy and rubbery amorphous polymers and semi-crystalline polymers will be reviewed. Additionally, time-temperature superposition for rate dependent large strain properties and pressure dependence in polymers will be discussed. Constitutive modeling and shock properties of polymers will not be discussed in this review.

show abstract

Section: Dynamic Loading: Split Hopkinson Pressure Barmentioning

confidence: 99%

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

286

121

View full text Add to dashboard Cite

show abstract

“…Strain waves have been reported in PMMA and other materials, most commonly from Split Hopkinson Pressure Bar (SHPB) and other impact tests [12,[15][16][17][18]. The strain waves produced in [15] show that an oscillatory transition region develops between the state of rest and the state of compressive strain due to geometrical dispersion in the waveguide.…”

Section: Introductionmentioning

confidence: 99%

Undular bores generated by fracture

et al. 2021

View full text Add to dashboard Cite

Undular bores, or dispersive shock waves, are nonstationary waves propagating as oscillatory transitions between two basic states, in which the oscillatory structure gradually expands and grows in amplitude with distance traveled. In this work we report an important mechanism of generation of nonlinear dispersive shock waves in solids. We demonstrate, using high-speed pointwise photoelasticity, the generation of undular bores in solid (polymethylmethacrylate) prestrained bars by natural and induced tensile fracture. For the distances relevant to our experiments, the viscoelastic extended Korteweg-de Vries equation is shown to provide very good agreement with the key observed experimental features for suitable choice of material parameters, while some local features at the front of the bore are also captured reasonably well by the linearization near the nonzero prestrain level. The experimental and theoretical approaches presented open avenues and analytical tools for the study and applications of dispersive shock waves in solids.

show abstract

“…where 𝑢 PS = (𝑢 rPS , 𝑢 θ PS , 𝑢 zPS ) and 𝑈 PL = (𝑈 rPL , 𝑈 θ PL , 𝑈 zPL ) are the displacement of solid and the displacement of pore fluid, respectively; A, N, Q, and R are all porous constants, [17,18] specifically, A and N correspond to the familiar Lame constants of a purely elastic solid, and N also represents the shear modulus of the solid, Q is a measure of the coupling between the volume change of the solid and that of the pore fluid, and R is the measure of the pressure which must be exerted on the fluid to force a given volume of it into the aggregate with the total volume remaining constant; parameters ρ 11 , ρ 12 , and ρ 22 are the dynamic coefficients that take into account the inertia effect of the moving fluid: ρ 12 is a coupling coefficient which represents a measure of the force which must be exerted on the pore fluid to prevent its (average) motion when an acceleration is imparted to the solid surrounding it. A flexural mode in which all three components of the displacement exist and depend on the angle θ .…”

Section: Governing Differential Equations and Wave Solutionsmentioning

confidence: 99%

Effect of porous surface layer on wave propagation in elastic cylinder immersed in fluid

Su¹,

Han²,

Shan³

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

To study the damage of an elastic cylinder immersed in fluid, a model of an elastic cylinder wrapped with a porous medium immersed in fluid is designed. This structure can both identify the properties of guided waves in a more practical model and address the relationship between the cylinder damage degree and the surface and surrounding medium. The principal motivation is to perform a detailed quantitative analysis of the longitudinal and flexural modes in an elastic cylinder wrapped with a porous medium immersed in fluid. The frequency equations for the propagation of waves are derived, each for a pervious and an impervious surface employing Biot theory. The influences of the various parameters of the porous medium wrapping layer on the phase velocity and attenuation are discussed. The results show that the influence of porosity on the dispersion curves of guided waves is much more significant than that of thickness, whereas the phase velocity is independent of the static permeability. There is an apparent “mode switching” between the two low-order modes. The characteristics of attenuation are in good agreement with the dispersion curves results. This work can support future studies for optimizing the theory of cylinder or pipeline damage detection.

show abstract

Parametric identification for material of viscoelastic SHPB from wave propagation data incorporating geometrical effects

Cited by 26 publications

References 19 publications

High Strain Rate Mechanics of Polymers: A Review

High Strain Rate Mechanics of Polymers: A Review

Undular bores generated by fracture

Effect of porous surface layer on wave propagation in elastic cylinder immersed in fluid

Contact Info

Product

Resources

About