Studies of the Bauer Piezoelectric Polymer Gauge (PVF2) Under Impact Loading

Lee, L. M.; Williams, W. David; Graham, R. A.; Bauer, F.

doi:10.1007/978-1-4613-2207-8_70

Cited by 9 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For these studies, standard impact loading experiments were developed for our ISL powder gun and for the Sandia 25 meter compressed gas gun [6,7,15]. For these studies, standard impact loading experiments were developed for our ISL powder gun and for the Sandia 25 meter compressed gas gun [6,7,15].…”

Section: Piezoelectric Pvdf Shock Responsementioning

confidence: 99%

“…It should be borne in mind, that, as shown on Fig. Techniques describing the electrical current measurement and gauge assembly are described in references [ 6,7,15,19]. In the impact experiment the symmetry conditions for identical impactor and sample materials require that precisely one half of the velocity at impact be imparted to the sample.…”

Section: Piezoelectric Pvdf Shock Responsementioning

confidence: 99%

“…An international cooperative study between Institut Franco-Allemand de Recherches de Saint-Louis (ISL) and Sandia National Laboratories to develop the PVDF gauge, has shown that 25 μm thick PVDF film can be reliably used in a wide range of precise stress and stress-rate measurements [6,7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Piezoelectric Polymer Shock Gauges

Bauer

2006

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

Strain sensitivity enhancement of thin metal film strain gauges on polymer microscale structures Abstract. The science and technology of piezoelectric materials has long been dominated by the availability of specific materials with particular properties. Piezoelectric PVDF (Poly(vinylidene fluoride) polymer and copolymers of PVDF with trifluoroethylene have shown to have the potential for new shock-wave sensors. Since 1981 through 1995, the piezoelectric response of PVDF was studied in a cooperative effort with François Bauer of ISL, France, R.A. Graham of Sandia National Laboratories and L.M. Lee of Ktech Corporation, Albuquerque. Among the known piezoelectric polymers, the PVDF plays an important role in measuring mechanical and physical state of matter under shock loading. The present paper presents the history of the development of the PVDF gauge. After 24 years of research in this area, main relevant results and data obtained are summarized as well as some original applications of the PVDF gauges.

show abstract

Section: Piezoelectric Pvdf Shock Responsementioning

confidence: 99%

Section: Piezoelectric Pvdf Shock Responsementioning

confidence: 99%

See 1 more Smart Citation

Piezoelectric Polymer Shock Gauges

Bauer

2006

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

show abstract

Pressure dependence of the dielectric properties and phase transitions of polyvinylidene fluoride (PVDF) and a copolymer with trifluoroethylene

Samara

1989

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

The frequency, temperature, and hydrostatic pressure dependences of the dielectric properties, molecular relaxations, and phase transitions in PVDF and a copolymer with a 30 mol% trifluoroethylene were investigated. The β‐relaxation peak temperature Tβ and the melting temperature Tm of both polymers, and the ferroelectric transition temperature Tc of the copolymer, are strong increasing functions of pressure. The magnitudes of the pressure derivatives of Tβ, Tc, and Tm increase in the order of the “transition” temperatures, i.e., Tβ(P) < Tc(P) < Tm(P). These results can be qualitatively understood in terms of the nature of the molecular motion and/or reorientation processes involved. The results on the copolymer suggest that pressure should induce a ferroelectric‐paraelectric transition in PVDF below Tm, but such a transition was not observed over the limited pressure range of the present experiments. The relaxational dynamic (not static) nature of the melting process in these materials is indicated by the observed dependence of Tm on probe frequency. The frequency (or rate) and strong pressure dependences of Tm of PVDF provide a rational explanation for why it is possible to use this polymer as a piezoelectric shock‐wave gauge to relatively high shock pressures and the accompanying high temperatures.

show abstract

Pressure dependence of the β molecular relaxation process and dielectric properties of polyvinylidene fluoride

Samara

1992

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

SYNOPSISThe effects of hydrostatic pressure to 20 kbar on the /3 molecular relaxation process of polyvinylidene fluoride (PVDF) and on the dielectric properties in the neighborhood of this relaxation have been investigated. This relaxation has a strong influence on the electrical and mechanical properties of PVDF. Pressure causes a large shift to higher temperatures ( -10K/kbar) of the dielectric relaxation peak and a decrease in the width of the distribution of relaxation times. This slowing down of the relaxation process is discussed in terms of the Vogel-Fulcher equation and related models, and it results from an increase in both the energy barrier to dipolar motion and the reference temperature ( T o ) for the kinetic relaxation process which represents the "static" dipolar freezing temperature for the process. The general applicability of the Vogel-Fulcher equation to relaxional processes in polymers and other systems is briefly discussed. The pressure dependence of the dielectric constant both above and below the relaxation peak temperature ( T,,,) is found to be dominated by the change in polarizability. The effect is larger above T,,, because of the relatively large decrease in the dipolar orientational polarizability with pressure. Keywords: dielectric properties of poly (vinylidene fluoride), pressure dependence of poly (vinylidene fluoride), pressure dependence of relaxation and dielectric properties of The expert technical assistance of L. V. Hansen is greatly appreciated.

show abstract

Studies of the Bauer Piezoelectric Polymer Gauge (PVF2) Under Impact Loading

Cited by 9 publications

References 4 publications

Piezoelectric Polymer Shock Gauges

Piezoelectric Polymer Shock Gauges

Pressure dependence of the dielectric properties and phase transitions of polyvinylidene fluoride (PVDF) and a copolymer with trifluoroethylene

Pressure dependence of the β molecular relaxation process and dielectric properties of polyvinylidene fluoride

Contact Info

Product

Resources

About