Experimental determination of ultrasonic wave velocities in plastics as functions of temperature. I. Common plastics and selected nose‐cone materials

Arnold, N.; Guenther, Arthur H.

doi:10.1002/app.1966.070100506

Cited by 20 publications

(5 citation statements)

References 5 publications

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“…Ultrasonic transducer probes were used in a two-probe 'send and receive' mode. A control module excites a pulse in the sender probe, and amplifies any signals detected by the receiver probe, producing a periodic trace that can be monitored on an oscilloscope [11]. The time lag from the incident pulse to the point of initial rise of the received pulse is deemed to be the travel time.…”

Section: Methodsmentioning

confidence: 99%

The mechanical response of a PBX and binder: combining results across the strain-rate and frequency domains

Drodge¹,

Williamson²,

Palmer³

et al. 2010

J. Phys. D: Appl. Phys.

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Abstract. The mechanical response of a polymer bonded explosive has been measured using a Split Hopkinson Pressure Bar at a strain-rate of 2000 s -1 , across a range of temperatures from 173 to 333 K, with the aim of observing its behaviour in the glassy regime. The yield stresses increased monotonically with decreasing temperature and no plateau was found. The failure mechanism was found to transition from shear-banding with crystal debonding fracture to brittle failure with some evidence of crystal fracture. Similar experiments were performed on samples of its nitrocellulose-based binder material, at a strain-rate of 3000 s -1 across a temperature range of 173-273 K. The failure stresses of the binder approach that of the composite at temperatures near -70°C. The elastic moduli were estimated from post-equilibrium regions of the stress-strain curves, and compared to those obtained for the composite using 5 MHz ultrasonic soundspeed measurement, and powder DMA measurements and quasi-static behaviour reported in a previous paper. The moduli were plotted on a common frequency axis: a temperature-shift was applied to collapse the curves, which agreed with the Cox Merz rule.

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Section: Methodsmentioning

confidence: 99%

The mechanical response of a PBX and binder: combining results across the strain-rate and frequency domains

Drodge¹,

Williamson²,

Palmer³

et al. 2010

J. Phys. D: Appl. Phys.

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show abstract

“…The settings used for the calibration is summarized in Table 3. For viscoelastic materials, such as HDPE at the temperatures studied here, the attenuation coefficient and phase velocity will vary with temperature [45,46]. Therefore, since the AST temperature will vary seasonally, the effect of temperature on wave velocity was evaluated.…”

Section: Ultrasonic Testing (Ut)mentioning

confidence: 99%

Laboratory Study on Non-Destructive Evaluation of Polyethylene Liquid Storage Tanks by Thermographic and Ultrasonic Methods

2021

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High-density polyethylene (HDPE) above-ground storage tanks (AST) are used by highway agencies to store liquid deicing chemicals for the purpose of road maintenance in the winter. A sudden AST failure can cause significant economic and environmental impacts. While ASTs are routinely inspected to identify signs of aging and damage, current methods may not adequately capture all defects, particularly if they are subsurface or too small to be seen during visual inspection. Therefore, to improve the ability to identify potential durability issues with HDPE ASTs, additional non-destructive evaluation (NDE) techniques need to be considered and assessed for applicability. Specifically, this study investigates the efficiency of using infrared thermography (IRT) as a rapid method to simultaneously examine large areas of the tank exterior, which will be followed by closer inspections with conventional and phased array ultrasonic testing (UT) methods. Results show that IRT can help to detect defects that are shallow, specifically located within half of the tank’s wall thickness from the surface. UT has the ability to detect all defects at any depth. Moreover, phased array UT helps to identify stacked defects and characterize each defect more precisely than IRT.

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“…The value of this property, made available by the manufacturer, is most certainly obtained from quasi-static tests. However, several authors have previously reported that this property is frequency dependent [11,[30][31][32][33]. Some of these authors suggest that the dynamic elastic modulus should be measured using the ultrasonic technique due to its non-destructive character.…”

Section: Dynamic Young's Modulus Measurementmentioning

confidence: 99%

Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test

et al. 2013

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Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test Citation for published version: Irausquín, I, Pérez-Castellanos, JL, Miranda, V & Teixeira-Dias, F 2013, 'Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test', Materials and Design, vol. 47, pp. 698-705. https://doi.Evaluation of the effect of the strain rate on the compressive response of a closedcell aluminium foam using the split Hopkinson pressure bar test I. Irausquín, J.L. Pérez-Castellanos, V. Miranda, F. Teixeira-Dias PII: S0261-3069(12)00879-5 DOI: http://dx.Please cite this article as: Irausquín, I., Pérez-Castellanos, J.L., Miranda, V., Teixeira-Dias, F., Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test, Materials and Design (2012), doi: http://dx. AbstractThe research here presented is focused on the evaluation of the dynamic behaviour of a closed-cell aluminium foam using the split Hopkinson pressure bar (SHPB) test. On a first approach, the influence of the material of the bars was studied and, as a consequence, polymethylmethacrylate (PMMA) was chosen as the most suitable material to be used in the bars and striker to test the specific aluminium foam considered. This set of bars was manufactured and several dynamic compression tests were carried out. The corresponding stress-strain behaviour was obtained and the dependence of mechanical parameters of the aluminium foam Alporas 10% on the strain rate was thoroughly analysed. It was possible to conclude that the material exhibits significant strain rate sensitivity, within the tested range of strain rates. The range of strain rate values where the compressive behaviour of the foam is different was also determined.

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Experimental determination of ultrasonic wave velocities in plastics as functions of temperature. I. Common plastics and selected nose‐cone materials

Cited by 20 publications

References 5 publications

The mechanical response of a PBX and binder: combining results across the strain-rate and frequency domains

The mechanical response of a PBX and binder: combining results across the strain-rate and frequency domains

Laboratory Study on Non-Destructive Evaluation of Polyethylene Liquid Storage Tanks by Thermographic and Ultrasonic Methods

Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test

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