The tensile strength of powders
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2024, International Journal of PharmaceuticsTensile strength of cohesive powders
2019, Advanced Powder TechnologyCitation Excerpt :The magnitude of these forces depends on the closeness of particles in the packing, like the yield stress the tensile strength is related to the present state due to stress history of the particulate solid. For cohesive powders, the tensile strength increases with increasing packing density due to the increase in the number and intensity of interparticle forces (adhesion, cohesion, van der Waals, interfacial, bridging and interlocking) [46–48]. The direction and module of compacting stresses must be defined in relation to the alignment of the plane in which failure takes place.
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2017, Chemical Engineering SciencePredicting physical properties of pharmaceutical compacts using focused beam reflectance measurement (FBRM)
2012, Journal of Drug Delivery Science and TechnologyStudy of the rheological behaviour of monomodal quartz particle beds under stress. A model for the shear yield functions of powders
2011, Chemical Engineering ScienceCitation Excerpt :Both models overestimate the value of C, fundamentally because the interparticle contact geometry (rough surfaces) and the particle packing characteristics in the bed (heterogeneities in particle distribution, etc.) are of greater complexity than the models based on ideal particle packings (smooth spheres of equal size). Other models (Cheng, 1968; Cheng et al., 1968, 1973; Hartley et al., 1985; Shinohara and Tanaka, 1975, etc.) attempt to explain why the experimental values of T, and therefore also of C, are smaller than the theoretical values and why the effect of compactness on the latter is greater than that described by Eq. (15). If the particles are not spherical, particle distribution and orientation in a bed will clearly be heterogeneous.