Quasi-static and dynamic response of 3D-printed alumina

Dynamic compressive response of zirconium diboride‐silicon carbide composites at high‐strain rates

“…At present, Splitting Hopkinson Pressure Bar (SHPB) test has been successfully employed to investigate dynamic response of brittle materials including ceramics, concretes, and rocks. Wang and Matthew's Reports show that the compressive strengths of alumina ceramics exhibit obvious strain rate dependence. Furthermore, an increase in compressive strength of the SiC ceramic with strain rate has been found by Shih and Wang .…”

Additive Manufacturing and Performance of Architectured Cement‐Based Materials

“…Similar to the trends observed in other additively manufactured materials, the presence of weak interface is considered detrimental for the overall mechanical performance of additively manufactured cement‐based materials, and current research efforts focus mostly on eliminating or strengthening the AM‐induced interfaces as a mean to minimize their effect on the overall strength, bearing capacity and to improve stress transfer across the interfaces in 3D‐printed elements . Contrary to the common approach that suggests elimination of the processing‐induced interfaces in various materials, we present a novel approach that combines harnessing the properties of heterogeneous interfaces with the design of material's architecture that can promote favorable damage mechanisms, allows for achievement of flaw tolerance and unique load–displacement response, and enhances the mechanical response in brittle cement‐based materials. The focus of this work is on 3D printing of brittle cement‐based materials, in which the ability to control the internal architecture of the structure at the macroscopic level (i.e., millimeter scale) may play a significant role by enabling novel performance characteristics, such as a quasibrittle mechanical behavior, fracture and damage tolerance, unique load–displacement response, and enhanced flexural strength.…”

“…There is a rising interest in hierarchical design and additive manufacturing (AM) of architectured materials due to their ability to achieve unique and novel performance characteristics . AM allows for engineering and fabrication of a vast array of metallic, ceramic, polymeric, composite, and hydrogel materials into complex solid and cellular structures and assists us in the understanding of the structure–property relationship . It has been established that AM of metallic, polymeric, hydrogel, and ceramic materials introduces microstructural heterogeneities, such as porosity and interfaces, which can result in anisotropy in the mechanical response of the elements.…”

“…AM allows for engineering and fabrication of a vast array of metallic, ceramic, polymeric, composite, and hydrogel materials into complex solid and cellular structures and assists us in the understanding of the structure–property relationship . It has been established that AM of metallic, polymeric, hydrogel, and ceramic materials introduces microstructural heterogeneities, such as porosity and interfaces, which can result in anisotropy in the mechanical response of the elements. For instance, in case of ceramic and metallic materials, the resulting anisotropic mechanical properties are demonstrated to be similar, lower, or higher, compared to the conventionally cast counterparts depending on the printing directions, the type of applied AM techniques, and mechanical property of interest .…”

“…For instance, in case of ceramic and metallic materials, the resulting anisotropic mechanical properties are demonstrated to be similar, lower, or higher, compared to the conventionally cast counterparts depending on the printing directions, the type of applied AM techniques, and mechanical property of interest . Currently, there are two approaches toward enhancement of the mechanical response of additively manufactured materials: a) elimination of detrimental heterogeneities such as porosities and interfaces present in fabricated metallic, ceramic, and hydrogel materials via optimizing the printing parameters in order to achieve performance comparable to cast counterparts and; b) incorporation of multiscale, hierarchical, and bioinspired design principles over a broad range of architectures of fabricated materials, from nano to micro, in order to engineer the mechanical properties, to significantly enhance the strength and tensile performance, load‐bearing capacity, compliancy, and impact resistance, and to overcome the brittleness and flaw‐sensitivity limitations of these materials . Similar to the trends observed in other additively manufactured materials, the presence of weak interface is considered detrimental for the overall mechanical performance of additively manufactured cement‐based materials, and current research efforts focus mostly on eliminating or strengthening the AM‐induced interfaces as a mean to minimize their effect on the overall strength, bearing capacity and to improve stress transfer across the interfaces in 3D‐printed elements .…”