Shock-induced formation of a disordered solid from a dense particle suspension

Petel, Oren E.; Frost, David L.; Higgins, Andrew; Ouellet, Simon

doi:10.1063/1.3686557

Cited by 6 publications

(10 citation statements)

References 8 publications

(12 reference statements)

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“…Thus, the strengthening and toughening effects observed in EPON 828-A, EPON 828-B, and PMMA can be attributed to the restriction of the mobility of the individual molecular chains at high strain rate. A similar effect is seen in dense particle suspensions under high-strain-rate loading, where the sudden jamming of their structure results in a significant increase in stiffness [79,85].…”

Section: Strain Rate Effectssupporting

confidence: 54%

An Experimental Investigation of Spall Fracture in Neat Epoxy and an Epoxy/Carbon Nanotube Composite

Pepper¹

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The spall strength of a material can be used to parameterize its ability to resist tensile failure under high-strain-rate loading. Dynamic failure in an assortment of representative materials was studied. A focus was placed on characterizing the mechanical properties of a polymer-matrix composite. Load frame testing was carried out to measure mechanical properties at quasi-static strain rates, while plate impact experiments were conducted to examine material response under dynamic loading conditions. Successful identification of the spall strengths and fracture toughnesses of aluminum 6061-T6 and polymethylmethacrylate (PMMA) validated the methods used in this investigation. An effect of the curing agent on the spall strength of an epoxy was identified.Nanotubes were found to have a detrimental effect on the dynamic mechanical properties of the resulting nanocomposite. Fracture surfaces of recovered nanocomposite fragments were imaged using a scanning electron microscope to identify failure mechanisms and propose a failure process.i

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Section: Strain Rate Effectssupporting

confidence: 54%

An Experimental Investigation of Spall Fracture in Neat Epoxy and an Epoxy/Carbon Nanotube Composite

Pepper¹

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“…From the simulations, it is clear that the stress chains form preferentially in the longitudinal direction [16]. The directionality of the chain formation should be expected due to the uniaxial strain loading imposed by the shock wave.…”

Section: Resultsmentioning

confidence: 99%

Lateral stress measurements in dense suspensions

Petel

Frost

Higgins

et al. 2012

AIP Conference Proceedings

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“…The objective is to determine the role of the particles during a ballistic event by studying the effects of particle volume fraction and material type, thus enabling future system optimization. Proper development of the composite described above would result in a flexible material having dynamic strengthening mechanisms similar to those observed in dense particle suspensions [6], while avoiding the issues associated with a liquid matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, dense particle suspensions have been characterized under ballistic impact conditions in order to determine the composite parameters responsible for improved ballistic resistance [5]. This enhanced response has been attributed to the inherent microstructural changes that occur within the particulate systems at sufficiently high impact pressures and strain rates [6,7]. Such ballistic conditions promote interparticle contact, resulting in a stiffening effect due to the formation of force chains that resist motion within the partially jammed network of particles [6,8,9,10].…”

Section: Introductionmentioning

confidence: 99%

A ballistic performance study on particle-infused elastomeric systems

Comtois-Arnaldo

Ouellet

Petel

2018

AIP Conference Proceedings

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Abstract. The present study investigates the complex multiscale dynamic response of particle-filled systems in an effort to link the bulk material behavior to strain-rate activated microstructures. These investigations involve multiphase systems consisting of micron-sized ceramic powders integrated within a siloxane elastomer to create flexible composites having varying inclusion properties. In particular, the effects of varying particle volume fraction, strength, and density are under investigation. The experimental investigation concerns the ballistic penetration of composite targets that are impacted by 16-grain blunt-nosed steel projectiles in the range of 200 -900 m s −1 . The results are compared to an analytical penetration model in order to shed light on the dominant penetration mechanisms and their relationship to the composite microstructure.

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Shock-induced formation of a disordered solid from a dense particle suspension

Cited by 6 publications

References 8 publications

An Experimental Investigation of Spall Fracture in Neat Epoxy and an Epoxy/Carbon Nanotube Composite

An Experimental Investigation of Spall Fracture in Neat Epoxy and an Epoxy/Carbon Nanotube Composite

Lateral stress measurements in dense suspensions

A ballistic performance study on particle-infused elastomeric systems

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