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Laser induced dynamic fracture of fused silica: Experiments and simulations

Article dans une revue avec comité de lecture
Author
DEREURE, Corentin
57111 Institut de Physique de Rennes [IPR]
HALL, R.
147329 Virginia Commonwealth University [VCU]
BABER, Forrest
147329 Virginia Commonwealth University [VCU]
LOISON, Didier
57111 Institut de Physique de Rennes [IPR]
LESCOUTE, Emilien
9658 Laboratoire de Détection et de Géophysique (CEA) [LDG]
119523 DAM Île-de-France [DAM/DIF]
GUIN, Jean-Pierre
57111 Institut de Physique de Rennes [IPR]
SANGLEBŒUF, Jean Christophe
57111 Institut de Physique de Rennes [IPR]
BERTHE, Laurent
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
NIVARD, Mariette
57111 Institut de Physique de Rennes [IPR]
GUVEN, Ibrahim
147329 Virginia Commonwealth University [VCU]

URI
http://hdl.handle.net/10985/14599
DOI
10.1016/j.jnoncrysol.2019.02.008
Date
2019
Journal
Journal of Non-Crystalline Solids

Abstract

Fused silica samples were subjected to laser induced shock loading. Laser flux was varied in order to obtain different amounts and characteristics of damage in the samples. Three dimensional damage and fracture maps of two identical samples impacted by high and low laser flux values were obtained using both optical microscopy and X-ray computed micro-tomography. Three prevalent fracture and damage patterns were identified. Peridynamic approach was used to simulate the laser impact conditions on the samples in order to explain the causes of the observed fracture and damage morphologies. A proprietary shock physics code, ESTHER, was used to calculate the transient kinetic energy imparted to the samples based on the experimental laser flux values. The kinetic energy values were then integrated over time and provided target values to match for the peridynamic impact conditions. The main fracture patterns were captured by peridynamic simulations with reasonable quantitative accuracy. Explanations for initiation and propagation of each of the fracture patterns were presented based on the peridynamic dynamic fracture simulations. Limitations of the computational approach and recommendations for future work is provided.

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