Al-12Si alloy processed through additive manufacturing exhibits a complex hierarchical structure. At the mesoscale, its melt pool boundaries constitute network of weak interfaces that provides preferred pathways for crack kinking, leading to both marked anisotropy and apparent enhancement in fracture energy. In this study, multiscale cohesive zone-based computational model semi-analytical appro...

Mesoporous TiO2 has been prepared using a nonionic block copolymer (Pluronic P-123) as structure-directing agent with sol-gel method. Characterization of the product was carried out by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry-differential scanning calorimetry (TG-DSC), Nitrogen sorption isotherms, and UV-vis absorpti...

The aim of this work is the investigation mesoscale/local variability in mechanical properties clear timber radial direction. Clear Norway spruce wood, Picea abies, was used for cutting specimens different lengths with a small cross-sectional area 4 × mm2, direction boards, and tested under tensile loading. In some were positioned regularly and, others, randomly, local deformations each specime...

Mesoporous nanomaterials have attracted widespread interest because of their structural versatility for applications including catalysis, separation, and nanomedicine. We report a one-pot synthesis method for a class of mesoporous silica nanoparticles (MSNs) containing both cubic and hexagonally structured compartments within one particle. These multicompartment MSNs (mc-MSNs) consist of a core...

We propose a technique for gloss and normal map acquisition of finescale specular surface details, or mesostructure. Our main goal is to provide an efficient, easily applicable, but sufficiently accurate method to acquire mesostructures. We therefore employ a setup consisting of inexpensive and accessible components, including a regular computer screen and a digital still camera. We extend the ...

We survey the current state of models for electronic processes in conducting polymer devices, especially light-emitting diodes (LEDs). We pay special attention to several processes that have been somewhat neglected in the previous literature: charge injection from electrodes into a polymer sample, mobility of chargeor energy-carrying defects within a single molecule, and (more briefly) transfer...

A contemporary question in the intensely active field of periodic mesoporous organosilica (PMO) materials is how large a silsesquioxane precursor can be self-assembled under template direction into the pore walls of an ordered mesostructure. An answer to this question is beginning to emerge with the ability to synthesize dendrimer, buckyball, and polyhedral oligomeric silsesquioxane PMOs. In th...

In this paper, we develop a numerical approach to simulate the 2D complex damage and fracture process of quasi-brittle concrete materials. Based on phase field theory for case elastic isotropic multicomponent materials generation based upon Monte Carlo’s simulation method, construct procedure solve thermodynamic problems. The diffusive variable obtained from calculation can be used represent cr...