Abstract: Methods for additive manufacturing include depositing a printing material in suspension within a printing tray containing a stressed medium, to form a three-dimensional object. This deposition of printing material is performed via at least one step of injecting the printing material using a nozzle of a printing head, which nozzle is immersed in the stressed medium and is able to move within the stressed medium in the three dimensions in space. This method comprises at least a step of modifying the level of the stressed medium in the printing tray. Additive manufacturing devices includes a stressed medium disposed in a printing tray, a printing head designed to dispense a printing material, and a device for modifying the level of the stressed medium of the printing tray. The printing head has a nozzle displaceable within the stressed medium in three spatial dimensions.

Abstract: An additive manufacturing process and device implement the deposition of a material to form a three-dimensional object. The process includes depositing the material in suspension within a stressed granular medium that comprises a granular phase and a gaseous interstitial phase. The granular phase consists solely of a material taking the form of discrete, solid elements that interact in regions of contact therebetween.