Geopolymers are known as high strength and durable construction materials but have a brittle fracture. In practice, this results in a sudden collapse at ultimate load, without any chance of preventing the breakdown of parts or of withstanding the stress for some time. Glass fiber usage as a total anisotropic shape acting as a compact structure component should hinder the fracture mechanism. The...

The metacognitive loop (MCL) is an architecture for automated noting, repairing, and learning from errors. Initial work on this award involved builing special-purpose MCL programs for each individual application domain. Later in the award period a more uniform approach was designed that employs a general framework providing ontologies for types of Indications, Failures, and Repairs. This allows...

Additive manufacturing (AM) enables diversity in honeycomb structure configuration, which benefits optimization of the structure. In present study, we proposed two locally enhanced triangular structures to improve in-plane compressive performance by avoiding diagonal fracture band. The behaviors and failure mechanism original made 316L steel were studied experiments numerical simulations. resul...

the application of ai-li alloy in aerospace and aircrafts industries have a promising future due to its lower density and a comparatible mechanical properties to the other aluminum alloys. the major problems encountered with parts made of al-li alloys, include segregation and brittleness. the presence of a precipitation free zone (pfz) and also the concentration of some elements such as k,na,o,...