Recent ideas on the mechanisms controlling the initial stages of plastic flow at cracks in intrinsically brittle materials, at the ductile-brittle transition, are reviewed. New experiments on precracked specimens of Si are reported, which confirm earlier work that the ductile-brittle transition is controlled by dislocation velocity. A model has been developed in which at the ductile-brittle tra...

Fiber-reinforced polymer (FRP)–concrete hybrid sections, composed of FRP profiles and a concrete slab, have gathered attention in construction due to their lightweight, easy installation, high durability. However, the low shear strength brittle behavior commercially available pultruded often leads failure at load levels. To enhance ductility, this study proposes novel H-shaped profile that is b...

The development of promising new high-performance materials, such as composite materials made fibers in a polymeric resin (fiber-reinforced polymer, or FRP), has transformed the structural rehabilitation and upgrade industry for buildings infrastructure. Conventional construction techniques (e.g., strengthening with externally bonded steel plates, known beton plaqués, steel/concrete jackets) ha...

Introduction: The existence of global oceans on some icy satellites—Europa and Enceladus, for example—implies the presence of a ductile warm ice layer. However, the role of such a ductile layer in controlling icy-surface deformation has never been systematically investigated nor quantified. We aim to address this issue by combining previous observations from geomorphological mapping of surface ...

One of the key issues associated with using of composites in various applications is their tensile behavior. The tensile behavior of a composite material is strongly influenced by the properties of its constituents and their distribution. This paper focuses on gaining some insights into the tensile process of pure and hybrid woven composite reinforced with brittle and ductile yarns. For this pu...

Reinforced Concrete Structures, traditionally using steel rebars, are vulnerable to corrosion under severe exposure conditions. This can result in several drawbacks such as concrete deterioration, reduced serviceability, increased maintenance costs, and structural durability. To counter these issues, Fibre Polymer bars have emerged another possibility material for bars. FRP anti-corrosive, high...

Ceramic matrix composites usually utilize carbon or ceramic fibers as reinforcements. However, such often expose a low ductility during failure. In this work, we follow the idea of reinforcement concept reinforced by refractory metal to reach pseudo ductile behavior Tungsten and molybdenum were chosen in SiCN manufactured polymer infiltration pyrolysis process. The investigated with respect mic...

BACKGROUND Refractory asthma represents an important condition, with considerable morbidity and mortality. Tumor necrosis factor α (TNF-α) is a potential target for treatment of severe asthma. However, controlled studies have shown controversial results and the risk-benefit profile of TNF-blocking agents is still debated. OBJECTIVES To describe the effect of infliximab on asthma control in pa...