Fracture mechanics of porous materials
https://doi.org/10.1016/j.engfracmech.2015.10.004
The effects of pore geometry on fracture mechanics is studied by considering notches of various types with a uniform crack growth. This work, published in Engineering Fracture mechanics, sheds light on the role of stress concentrators in the toughness of porous materials.
Additive manufacturing of ceramics from preceramic polymers
Following extensive research by our outstanding doctoral candidate here, Dr. Wang, a publication in the journal Additive Manufacturing is now in press.
Here novel disilicides were explored for use in heat shields.
WSi2 and MoSi2 were applied as coatings on an insulating zirconia substrate.
The high emissivity of these compounds and their mixtures, makes them very attractive for use in spacecraft.
Compressive performance and crack propagation in MAX phase composites
Here micro CT was used to reveal the structure performance relationships in metal/ceramic composites based on Ti2AlC / Al alloy combinations.
The results show the promise of infiltrated max phase materials in the production of high performance composites.
Theoretical study into the hydrophobicity exhibited by a representative rare earth oxide, CeO2.
https://www.sciencedirect.com/science/article/pii/S0169433219302399
The interactions between solute atoms and crystalline defects such as vacancies, dislocations, and grain boundaries are essential in determining alloy properties. Here (Nature Communications, (2019) 10:4484) we present a general linear correlation between two descriptors of local electronic structures and the solute-defect interaction energies in binary alloys of body-centered-cubic (bcc) refractory metals (such as W and Ta) with transition-metal substitutional solutes.
In this paper we discuss the mechanics of anelastic bodies with respect to a Riemannian and a Euclidean geometric structure on the material manifold. These two structures provide two equivalent sets of governing equations that correspond to the geometrical and classical approaches to nonlinear anelasticity. This paper provides a parallelism between the two approaches and explains how to go from one to the other. We work in the setting of the multiplicative decomposition of deformation gradient seen as a non-holonomic change of frame in the material manifold.
