Dynamic response of an elastic sphere under diametral impacts

Wu, Shengzhi; Chau, Kam Tim

doi:10.1016/j.mechmat.2005.08.005

Cited by 13 publications

(10 citation statements)

References 25 publications

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“…As the impact energy is increased, a greater number of fragments are produced [70], in addition to complete disintegration of the contact zone for agglomerate structures [65]. This relationship with applied force is also observed for double impact testing [86].…”

Section: Particle Morphologymentioning

confidence: 58%

Particle attrition mechanisms, their characterisation, and application to horizontal lean phase pneumatic conveying systems: A review

et al. 2018

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Understanding particle attrition is vital to the optimisation of a wide range of industrial processes. Lean phase pneumatic conveying is one such process, whereby the high energy particle impacts can cause undesirable loss in product quality or change in bulk behaviour. The attrition process is resolved into a material function and a process function; the combination of these functions dictate the attrition mechanism present, and the magnitude of failure observed. Subsequently, the forces applied to the particles are examined within the context of lean phase pneumatic conveying. Finally, empirical and numerical models are reviewed along with comments on experimental method. To summarise some of the findings of this review: the requirement of standardised test equipment is recognised in order to compare the wide variety of particulate materials under comparable loading conditions; stronger correlation between the results obtained from different particle attrition test methods is required; and finally, seldom are the manufacturing conditions (where applicable) linked to the particulate attrition behaviour.

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Section: Particle Morphologymentioning

confidence: 58%

Particle attrition mechanisms, their characterisation, and application to horizontal lean phase pneumatic conveying systems: A review

et al. 2018

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“…The particle fracture mode was observed to depend on the material properties of the particle and the energy input into the particle [12], [19]. Fragments increased in number and decreased in size as the input energy was increased for ceramic particles [12], [19].…”

Section: Introductionmentioning

confidence: 99%

“…Above the threshold velocity, the particles were observed to fragment explosively [10]. In drop tower testing, a predetermined weight was dropped on a single particle sandwiched between two rigid platens [16]- [19]. The particle fracture mode was observed to depend on the material properties of the particle and the energy input into the particle [12], [19].…”

Section: Introductionmentioning

confidence: 99%

“…In drop tower testing, a predetermined weight was dropped on a single particle sandwiched between two rigid platens [16]- [19]. The particle fracture mode was observed to depend on the material properties of the particle and the energy input into the particle [12], [19]. Fragments increased in number and decreased in size as the input energy was increased for ceramic particles [12], [19].…”

Section: Introductionmentioning

confidence: 99%

“…An analytical formulation for the stress states present in a single particle under diametral compression and impact loading has been proposed [3], [19], [20]. Based on this stress state, two conflicting parameters were proposed as the critical factors causing fracture of particles.…”

Section: Introductionmentioning

confidence: 99%

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Fracture mechanisms of glass particles under dynamic compression

Parab

Guo

Hudspeth

et al. 2017

International Journal of Impact Engineering

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In this study, dynamic fracture mechanisms of single and contacting spherical glass particles were observed using high speed synchrotron X-ray phase contrast imaging. A modified Kolsky bar setup was used to apply controlled dynamic compressive loading on the soda-lime glass particles. Four different configurations of particle arrangements with one, two, three, and five particles were studied. In single particle experiments, cracking initiated near the contact area between the particle and the platen, subsequently fragmenting the particle in many small sub-particles. In multi-particle experiments, a crack was observed to initiate from the point just outside the contact area between two particles.The initiated crack propagated at an angle to the horizontal loading direction, resulting in separation of a fragment. However, this fragment separation did not affect the ability of the particle to withstand further contact loading. On further compression, large number of cracks initiated in the particle with the highest number of particle-particle contacts near © 2017. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 one of the particle-particle contacts. The initiated cracks roughly followed the lines joining the contact points. Subsequently, the initiated cracks along with the newly developed subcracks bifurcated rapidly as they propagated through the particle and fractured the particle explosively into many small fragments, leaving the other particles nearly intact.

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