Modelling of projectile penetration into lightweight expanded clay aggregate

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This work presents a phenomenological model for estimating projectile penetration into granular lightweight expanded clay aggregate often known as Lightweight expanded clay aggregate (LECA). Laboratory scale penetration experiments in the low-velocity regime performed using LECA are presented. A penetration model based on the mass and momentum balances is proposed and the model parameters are derived from the physical behaviour of the penetrated material. It was found that the penetration behaviour predicted by the model agrees reasonably well with the experimental results for three cases studied in detail in terms of projectile deceleration during the penetration and the final penetration depth as well as for the other cases for which only measured penetration depths were available. Although the proposed model results correspond well with the experiments, further validation and more detailed modelling of the dynamic effects of the assumed deformation mechanisms of the penetrated material are needed.
Original languageEnglish
Pages (from-to)425-437
JournalJournal of Dynamic Behavior of Materials
Volume2
Issue number4
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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Projectiles
Clay
Deceleration
Momentum
Experiments
clay

Keywords

  • lightweight expanded clay aggregate
  • LECA
  • penetration experiments
  • crushing
  • phenomenological model

Cite this

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title = "Modelling of projectile penetration into lightweight expanded clay aggregate",
abstract = "This work presents a phenomenological model for estimating projectile penetration into granular lightweight expanded clay aggregate often known as Lightweight expanded clay aggregate (LECA). Laboratory scale penetration experiments in the low-velocity regime performed using LECA are presented. A penetration model based on the mass and momentum balances is proposed and the model parameters are derived from the physical behaviour of the penetrated material. It was found that the penetration behaviour predicted by the model agrees reasonably well with the experimental results for three cases studied in detail in terms of projectile deceleration during the penetration and the final penetration depth as well as for the other cases for which only measured penetration depths were available. Although the proposed model results correspond well with the experiments, further validation and more detailed modelling of the dynamic effects of the assumed deformation mechanisms of the penetrated material are needed.",
keywords = "lightweight expanded clay aggregate, LECA, penetration experiments, crushing, phenomenological model",
author = "Juha Kuutti",
year = "2016",
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language = "English",
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pages = "425--437",
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Modelling of projectile penetration into lightweight expanded clay aggregate. / Kuutti, Juha.

In: Journal of Dynamic Behavior of Materials, Vol. 2, No. 4, 2016, p. 425-437.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Modelling of projectile penetration into lightweight expanded clay aggregate

AU - Kuutti, Juha

PY - 2016

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N2 - This work presents a phenomenological model for estimating projectile penetration into granular lightweight expanded clay aggregate often known as Lightweight expanded clay aggregate (LECA). Laboratory scale penetration experiments in the low-velocity regime performed using LECA are presented. A penetration model based on the mass and momentum balances is proposed and the model parameters are derived from the physical behaviour of the penetrated material. It was found that the penetration behaviour predicted by the model agrees reasonably well with the experimental results for three cases studied in detail in terms of projectile deceleration during the penetration and the final penetration depth as well as for the other cases for which only measured penetration depths were available. Although the proposed model results correspond well with the experiments, further validation and more detailed modelling of the dynamic effects of the assumed deformation mechanisms of the penetrated material are needed.

AB - This work presents a phenomenological model for estimating projectile penetration into granular lightweight expanded clay aggregate often known as Lightweight expanded clay aggregate (LECA). Laboratory scale penetration experiments in the low-velocity regime performed using LECA are presented. A penetration model based on the mass and momentum balances is proposed and the model parameters are derived from the physical behaviour of the penetrated material. It was found that the penetration behaviour predicted by the model agrees reasonably well with the experimental results for three cases studied in detail in terms of projectile deceleration during the penetration and the final penetration depth as well as for the other cases for which only measured penetration depths were available. Although the proposed model results correspond well with the experiments, further validation and more detailed modelling of the dynamic effects of the assumed deformation mechanisms of the penetrated material are needed.

KW - lightweight expanded clay aggregate

KW - LECA

KW - penetration experiments

KW - crushing

KW - phenomenological model

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JF - Journal of Dynamic Behavior of Materials

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