Erratum: “Compositional effects on the shock-compression response of alumina-filled epoxy” [J. Appl. Phys. 101, 083527 (2007)]

Setchell, Robert E.; Anderson, M. U.; Montgomery, S. T.

doi:10.1063/1.2828171

Cited by 2 publications

(13 citation statements)

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“…The wave profiles show rounding at the peak of the rise indicating dispersion. 5 However, the wave dispersion does not appear to depend on the presence or type of the second phase in the material.…”

Section: Resultsmentioning

confidence: 99%

“…3 Additionally, the release wave velocity is a strong function of particle velocity and much faster than the initial shock wave. 2,5 A recent investigation shows that epoxy-WC composites have a similar stress-strain response as epoxy-Al 2 O 3 composites, as well as a strong dependence of release wave speed on particle velocity. 6 In epoxy, [11][12][13] Carter and Marsh 11 observed failure of the shock velocity to extrapolate to the ultrasonic bulk sound speed, which they attributed to the compressed distance between the polymer chains with rigid polymer backbones.…”

Section: Introductionmentioning

confidence: 99%

“…The propagated wave observed in epoxy-Al 2 O 3 broadens at low input stress due to the increased time available for viscous mechanisms. 5 As the input stress increases, the epoxy-Al 2 O 3 composite material exhibits viscoelastic behavior. 3 Additionally, the release wave velocity is a strong function of particle velocity and much faster than the initial shock wave.…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that the matrix material dominates the bulk shock response of epoxy-based particulate composites regardless of the material properties of the particulate phase. [4][5][6] The third phase here is added to investigate the effects of the complementary deformation of the two powder phases. For example, it was shown in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Shock Equation of State of Multi-Constituent Epoxy-Metal Particulate Composites

Jordan¹,

Herbold²,

Sutherland³

et al. 2012

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ii This page intentionally left blank iii REPORT DOCUMENTATION PAGE Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) AFRL-RW-EG-TP-2012-003 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Air Force Research Laboratory, Munitions DirectorateOrdnance Division Energetic Materials Branch (AFRL/RWME) Eglin AFB FL 32542-5910 Technical Advisor: Dr. Jennifer L. Jordan SPONSOR/MONITOR'S ACRONYM(S)AFRL-RW-EG SPONSOR/MONITOR'S REPORT NUMBER(S)AFRL ABSTRACTThe shock properties of epoxy-based particulate composites have been extensively studied in the literature. Generally, these materials only have a single particulate phase; typically alumina. This paper presents equation of state experiments conducted on five epoxy-based particulate composites. The shock stress and shock velocity states were measured for five different composites: two epoxy-aluminum two-phase composites, with various amounts of aluminum, and three epoxy-aluminummetal composites, where the metal constituent was either copper, nickel, or tungsten. The impact velocities ranged from 300 to 960 m/s. Numerical simulations of the experiments of epoxy-Al are compared with mesoscale simulations of epoxy-Al2O3 composites to investigate the effect of the soft versus hard particulate; additionally, an epoxy-Al-W simulation was conducted to investigate the material properties of the second phase on shock response of these materials. In these epoxybased particulate composites, the slope of the shock velocity-particle velocity curve appears to depend on the epoxy binder. It is shown that the addition of only 10 vol % of a second, denser metallic phase significantly affects the shock response in these composites. The shock properties of epoxy-based particulate composites have been extensively studied in the literature. Generally, these materials only have a single particulate phase; typically alumina. This paper presents equation of state experiments conducted on five epoxy-based particulate composites. The shock stress and shock velocity states were measured for five different composites: two epoxy-aluminum two-phase composites, with various amounts of aluminum, and three epoxy-aluminum-...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shock Equation of State of Multi-Constituent Epoxy-Metal Particulate Composites

Jordan¹,

Herbold²,

Sutherland³

et al. 2012

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“…A fundamental understanding of the effects of composition and microstructure on the elastic properties of these engineered materials is required for a quantitative analysis of their use in applications. Plate impact experiments 1,2 have been used to examine the effect of composition, specified as the relative amount and type of alumina particles suspended in the epoxy, on the stress generated during shock-wave compression. It is of interest to be able to predict the stress produced in a specific composition for a given state of strain.…”

Section: Introductionmentioning

confidence: 99%

Effects of composition on the mechanical response of alumina-filled epoxy.

Montgomery¹

2009

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The effect of composition on the elastic responses of alumina particle-filled epoxy composites is examined using isotropic elastic response models relating the average stresses and strains in a discretely reinforced composite material consisting of perfectly bonded and uniformly distributed particles in a solid isotropic elastic matrix. Responses for small elastic deformations and large hydrostatic and plane-strain compressions are considered. The response model for small elastic deformations depends on known elastic properties of the matrix and particles, the volume fraction of the particles, and two additional material properties that reflect the composition and microstructure of the composite material. These two material properties, called strain concentration coefficients, are characterized for eleven alumina-filled epoxy composites. It is found that while the strain concentration coefficients depend strongly on the volume fraction of alumina particles, no significant dependence on particle morphology and size is observed for the compositions examined. Additionally, an analysis of the strain concentration coefficients reveals a remarkably simple dependency on the alumina volume fraction. Responses for large hydrostatic and plane-strain compressions are obtained by generalizing the equations developed for small deformation, and letting the alumina volume fraction in the composite increase with compression. The large compression plane-strain response model is shown to predict equilibrium Hugoniot states in alumina-filled epoxy compositions remarkably well.

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Erratum: “Compositional effects on the shock-compression response of alumina-filled epoxy” [J. Appl. Phys. 101, 083527 (2007)]

Cited by 2 publications

References 0 publications

Shock Equation of State of Multi-Constituent Epoxy-Metal Particulate Composites

Shock Equation of State of Multi-Constituent Epoxy-Metal Particulate Composites

Effects of composition on the mechanical response of alumina-filled epoxy.

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