Initiation of a Metal/Fluoropolymer Reactive Material Subjected to Dynamic Shear‐Compression Loading

Miller, Bradley S.; Thoma, Steven G.; Kimberley, Jamie

doi:10.1002/prep.202100353

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…As the stress on the inside of the sleeve is equal to that on the outside of the specimen, the

σ_{normala} (t)

can be calculated by

σ_{normala} (t) = \frac{σ_{r} (t) E_{1} / E_{2} (1 - v_{2} + (\frac{1 + a^{2} / b^{2}}{1 - a^{2} / b^{2}} + v_{1}))}{v_{2}}

where

v_{1}

is the Poisson ratio of the sleeve. As

E_{2}

is numerically much considerable than

E_{1}

, [ 16 ] the above equation can be simplified to

σ_{a} (t) = σ_{r} (t) (1 - v_{2}) / v_{2}

.…”

Section: Resultsmentioning

confidence: 99%

“…where v 1 is the Poisson ratio of the sleeve. As E 2 is numerically much considerable than E 1 , [16] the above equation can be simplified to σ a ðtÞ ¼ σ r ðtÞð1 À v 2 Þ=v 2 .…”

Section: Dynamic Mechanical Properties Under Confining Pressurementioning

confidence: 99%

“…By analyzing the experimental data, he believed that the reaction characteristics of reactive materials are related to strain rate and impact pressure. Recently, Miller [ 16 ] carried out a dynamic shear‐compression experiment with a circular cylinder specimen with two semicircular notches on opposite sides. The results have shown that the specimen fracture prior to the reaction, and the damage caused by internal cracks significantly affect the reaction.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Confining Pressure on Impact Reaction Threshold of Aluminum/Polytetrafluoroethylene Reactive Material

2023

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An impact reaction experiment is conducted with a modified split Hopkinson pressure bar (SHPB) apparatus to study the reaction threshold of aluminum/polytetrafluoroethylene (Al/PTFE) reactive materials under confining pressure. The dynamic compression behavior, impact damage characteristics, and impact reaction threshold of the Al/PTFE reactive material under the confining pressure are investigated. The results have presented that confining pressure makes the specimens suffer triaxial loading and improves the dynamic compressive strength of Al/PTFE reactive materials from 36.8 MPa (impact velocity is 14.64 m s−1) to 62.7 MPa (14.80 m s−1). Besides, the fractal dimension of the posttest specimen is decreased by confining pressure, which has proved that the confining pressure hinders damage under impact loading. Moreover, the impact reaction experiment demonstrates that the confining pressure increases the threshold of Al/PTFE, and the minimum specific incident energy for the reaction of the T10 (molding pressure is 10 MPa) specimen increases from 48.92 to 59.72 J cm − 2 . This research not only reveals that Al/PTFE can be reacted by impact loading at confining pressure but also clarifies that confining pressure limits the impact damage of the Al/PTFE reactive material and increases the reaction threshold.

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“…As the stress on the inside of the sleeve is equal to that on the outside of the specimen, the

σ_{normala} (t)

can be calculated by

σ_{normala} (t) = \frac{σ_{r} (t) E_{1} / E_{2} (1 - v_{2} + (\frac{1 + a^{2} / b^{2}}{1 - a^{2} / b^{2}} + v_{1}))}{v_{2}}

where

v_{1}

is the Poisson ratio of the sleeve. As

E_{2}

is numerically much considerable than

E_{1}

, [ 16 ] the above equation can be simplified to

σ_{a} (t) = σ_{r} (t) (1 - v_{2}) / v_{2}

.…”

Section: Resultsmentioning

confidence: 99%

“…where v 1 is the Poisson ratio of the sleeve. As E 2 is numerically much considerable than E 1 , [16] the above equation can be simplified to σ a ðtÞ ¼ σ r ðtÞð1 À v 2 Þ=v 2 .…”

Section: Dynamic Mechanical Properties Under Confining Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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