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Chapitre D'ouvrage Année : 2024

Dynamic behavior of ceramic materials

Comportement dynamique des céramiques

Résumé

Although the dynamic behaviour of ceramics is less well-known than that of other material families such as metals, polymers, composites or even geomaterials, these materials are nonetheless widely used in many fields under dynamic or shock loading. Under such extreme conditions, these materials exhibit damage and deformation modes that are difficult to observe under static loading. For this reason, the study of their behaviour under high strain-rate is a major challenge. These materials combine low density compared to dense materials like steels with interesting, and even exceptional properties under compressive loadings over a wide temperature range, making them particularly valuable as part of shielding solutions against high-speed impact or high-energy-density pulse loading. On the other hand, these materials exhibit low toughness and ductility in the absence of confinement, which explains their ability to fragment under dynamic tensile loading. In addition, the damage and deformation modes in these materials are particularly sensitive to microstructural parameters such as sintering defects, flaws, grain boundaries, secondary phases. The experimental study of the dynamic behaviour of these materials requires the use of specific experimental methods to characterize their strength under high-rate tension, as well as under high confinement pressure in their pristine (unfragmented) or fragmented states. On the other hand, plasticity and anisotropic damage models must be developed and implemented in numerical codes, considering the influence of loading-rate, level of confinement pressure and deformation or fragmentation state of the ceramic material. This chapter provides a non-exhaustive summary of the work available in the literature on these topics.
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Dates et versions

hal-04469348 , version 1 (20-02-2024)

Identifiants

Citer

P. Forquin. Dynamic behavior of ceramic materials. Mikko Hokka. Dynamic Behavior of Materials: Fundamentals, Material Models, and Microstructure Effects, Elsevier, pp.449-482, 2024, 978-0-323-99153-7. ⟨10.1016/B978-0-323-99153-7.00014-1⟩. ⟨hal-04469348⟩

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