Dimensioning of concrete walls against small calibre impact including models for deformable penetrators and the scattering of experimental results

Gebbeken, Norbert; Linse, Tobias; Hartmann, Thomas; Teich, Martien; Pietzsch, Achim

doi:10.1007/978-1-4419-0727-1_12

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…These experiments are part of an experimental series whose aim is to assess the effectiveness of existing protective structures and, likewise, to design future ones. Based on these results, a tool similar to the one presented in [15] and Linse and Gebbeken 2009 [19] could be developed to determine the dimensioning of concrete components. In order to develop a much larger database, further experiments are recommended using different concrete types and at least five rounds per configuration.…”

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confidence: 99%

An Evaluation of Shaped Charge Experiments Using Concrete Components

Esteban

Lenhart²,

Rüdiger

et al. 2015

International Journal of Protective Structures

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The current contribution presents and evaluates a series of experimental results of shaped charge jets impinging concrete targets. The purpose of this study is threefold. Firstly, the dimensions of the damaged areas, namely the crater, spalling and perforation/penetration regions were measured. Crater dimensions are found to be independent of target thickness whilst spalling dimensions are not. Secondly, the depths of penetration of Normal Strength Concrete (NSC) and Ultra High Performance Concrete (UHPC) were compared. In these experiments the use of UHPC does not provide, on average, a significant reduction in the total depth of penetration, whilst being three times more expensive than NSC. Thirdly, the following three jet properties inside and behind the target were examined: jet velocity, jet mass and jet kinetic energy. The amount by which these properties are reduced in concrete and in air is quantified and compared. As a long term goal, these experiments aim to contribute to the assessment of existing protective structures and, likewise, to the design of future ones.

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confidence: 99%

An Evaluation of Shaped Charge Experiments Using Concrete Components

Esteban

Lenhart²,

Rüdiger

et al. 2015

International Journal of Protective Structures

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“…Ref. 37). For another reason scattering as the causation for the observed deviations is highly probable.…”

Section: Large Caliber Impact Into Non-reinforced Concretementioning

confidence: 96%

A Hydrocode Material Model for Concrete

Hartmann¹,

Pietzsch²,

Gebbeken³

2010

International Journal of Protective Structures

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In order to predict the behavior of concrete structures under impulsive loading it is not only essential to be able to model the dynamic strength and other strain rate dependent properties of the material, but also to describe realistically the damage and the softening process of the material. Various material models representing different phenomena of the response of concrete to high dynamic loads have already been developed. However, concrete modeling, especially damage modeling, is still far from completion. This paper presents an enhanced material model (HPG) for the simulation of concrete subjected to high dynamic loads. It combines existing approaches from different material models and new formulations for the dynamic strength increase, damage and degradation. The model is based on static material behavior and extends it to the high dynamic range. The formulations for yield surface, plastic hardening and strain rate dependency are presented and the damage and degradation models are explained in detail. The model was implemented in the commercial hydrocode Autodyn and validated both by contact detonation and large caliber impact tests.

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“…On the basis of the model proposed by Forrestal et al (1994), Frew et al (1998) and Teland (2001, 2003) suggested a three-term model (see also Gebbeken et al, 2009). Some models for semi-infinite shields and shields having a finite thickness were suggested by Seifoori and Liaghat (2011) and Shiqiao et al (2004Shiqiao et al ( , 2006Shiqiao et al ( , 2009.…”

Section: Systematization Of Modelsmentioning

confidence: 99%

Analytical engineering models for predicting high speed penetration of hard projectiles into concrete shields: A review

Ben‐Dor

Dubinsky

Elperin

2014

International Journal of Damage Mechanics

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We describe virtually all known analytical models for predicting protective properties of concrete shields against normal high-speed impact by rigid projectiles. Presented formulas can be directly used in practical calculations. Particular emphasis is given to widely used one-stage and two-stage models which are systemized in a hierarchical classification system using a unified approach. One-stage models employ the same formula along the whole trajectory of a projectile for calculating a force exerted on a penetrating projectile by a shield. In the case of two-stage models, a resistance force at the first stage of penetration is a linear function of the instantaneous depth of penetration while at the second stage of penetration normal stresses at every location on projectile-shield contact surface are polynomial function of normal velocity component. Conditions of continuity of the resistance force and velocity of a projectile are invoked in the transition point between these two sub-models. A wide variety of models can be devised by using different sub-models at each stage of penetration.

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Dimensioning of concrete walls against small calibre impact including models for deformable penetrators and the scattering of experimental results

Cited by 5 publications

References 14 publications

An Evaluation of Shaped Charge Experiments Using Concrete Components

An Evaluation of Shaped Charge Experiments Using Concrete Components

A Hydrocode Material Model for Concrete

Analytical engineering models for predicting high speed penetration of hard projectiles into concrete shields: A review

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