Role of wet particulate material fracture toughness in formation of drying cracks

Project description

It is currently not possible to predict the initiation and location of drying cracks (often referred to as “mud cracks”). Prediction of the time and location of fracture of particle networks is critical in order to prevent failure of paints, coatings and advanced ceramics components. Formation of mud cracks in wastewater sludges during dewatering will lead to reduced processing time. The proposed research aims to develop a methodology to predict the fracture of wet particulate materials during drying, by combining understanding of material properties (namely fracture toughness) and the development of stress in the desaturating body. Recently the Franks group has developed methodology to measure fracture toughness in wet, dry and partially saturated particulate materials.1 The Sticklang group has developed models to predict the solids concentration as a function of depth and time into the drying particulate material.  the goal of this research project is to combine these two methods to better understand drying crack initiation. 

A degree in Materials, Mechanics or Chemical Engineering is preferred.

For technical information on the project, contact the academic supervisor, Prof. George V. Franks,

1)M. L. Sesso and G. V. Franks, “Fracture toughness of wet and dry particulate materials comprised of colloidal sized particles: role of plastic deformation”, Soft Matter, 13, 4746-4755 (2017).

Project team

Leader: George Franks

Staff: Anthony Stickland

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