Modelling the material parameter distribution of expanded granules

Woitzik, Christian; Düster, Alexander

doi:10.1007/s10035-017-0735-4

Cited by 15 publications

(28 citation statements)

References 15 publications

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“…These two models for the crushing strength and Young's modulus are then combined -also taking into account the diameter distribution -to a three-dimensional model. Neglecting the correlation between the crushing strength and Young's modulus, this corresponds to a simple multiplication of the related probability density functions [4]. The resulting model can be seen in Fig.…”

Section: Experimental Setup and Experimental Resultsmentioning

confidence: 99%

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Statistical characterization of granular material applied as crash absorber in ship building

Woitzik

Chaudry

Wriggers

et al. 2017

Proc Appl Math and Mech

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This contribution deals with the determination of material parameters of lightweight granules, which will be used to increase the crashworthiness in ship construction. Using expanded glass or clay granules as a crash absorber requires a detailed knowledge about the single grain properties, such as Young's modulus or crushing strength. Therefore, a uniaxial compression test was performed and the results are covered with a statistical model consisting of nine parameters.

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Section: Experimental Setup and Experimental Resultsmentioning

confidence: 99%

“…The obtained model, consisting in total of nine parameters, can then be used to generate sample numbers corresponding to a given type of granules. Therefore, a sample number generator is used, which is described in detail in [4], resulting in the parameter tuples shown in Fig. 7.…”

Section: Experimental Setup and Experimental Resultsmentioning

confidence: 99%

Statistical characterization of granular material applied as crash absorber in ship building

Woitzik

Chaudry

Wriggers

et al. 2017

Proc Appl Math and Mech

Self Cite

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“…Poisson's ratio was assumed to be constant and equal to 0.3. The data recorded before reaching a 2% strain, limiting value for the elastic behavior of LECA [6], was used along with the least squares method for determining the value of E.…”

Section: Fig 4 Indirect Tensile Test On Single Grainmentioning

confidence: 99%

“…They are used in road construction, tunneling, structural backfilling around foundations, retaining walls, and bridges' abutments. Usually chosen in order to reduce the applied load transmitted to the foundation's soft clayey soil [1][2][3][4][5][6]. The significant internal porosity of such aggregates explains their low density (about 40% that of natural aggregate), thermal and acoustic insulation, and high resistance to fire and chemical attacks [7].…”

Section: Introductionmentioning

confidence: 99%

Micro-Mechanical Properties of Expanded Clay Particles

Jamaa¹,

Elghezal²,

Jamei³

2019

IJITEE

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The aim of this paper is to study the micro-mechanical behavior of an industrial crushable and highly porous granular material. Lightweight Expanded Clay Aggregates (LECA) was selected in this research for testing thanks to its brittle nature and highly porous character which makes it easier to study the crushable behavior of this material. LECA’s micro-mechanical properties were identified to understand the parameters that affect particle’s crushing. Uniaxial compression tests, consisting on compressing the particles between two rigid platens, were made on a set of single LECA’s particles to investigate the force displacement response and the Hertzian behavior was identified as the contact law. The particles’ strengths were determined for tested granules using the crushing force and grains’ Young moduli were calculated using the suggested contact law. Due to their high variability, the particles’ crushing stress and their Young moduli were related to particle’s dimension using a suggested power law to predict these mico-mechanical properties. Results have shown a high dependency between the particle’s micro-mechanical properties and their dimensions.

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“…To fully understand the behaviour of these particles, experimental testing is mandatory. Therefore several tests were already performed to find material parameters for FEM or DEM modelling [3,4]. To combine these two methods, a simplified collision test is used for validation.…”

Section: Introductionmentioning

confidence: 99%

Modelling and experimental testing of expanded granules as crash‐absorber for double hull ships

Woitzik

Chaudry

Wriggers

et al. 2018

Proc Appl Math and Mech

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In this contribution, expanded glass granules are investigated, which will be used to increase the crashworthiness in ship construction. Therefore, an experimental setup is presented. This setup represents a simplified side hull structure of a double hull ship. The empty space between the double hull structure can be filled with the granular material which acts as crash absorber.The described experiment will be used to validate the finite element simulation of the penetration of the double hull with the bulbous bow. To model the granules the Mohr-Coulomb material model is taken advantage of. Based on the experimental data the suitability of the Mohr-Coulomb model will be discussed.

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Modelling the material parameter distribution of expanded granules

Cited by 15 publications

References 15 publications

Statistical characterization of granular material applied as crash absorber in ship building

Statistical characterization of granular material applied as crash absorber in ship building

Micro-Mechanical Properties of Expanded Clay Particles

Modelling and experimental testing of expanded granules as crash‐absorber for double hull ships

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