Fibre-reinforced composite materials are widespread in lightweight, high-performance applications. However, polymeric composites generally exhibit a brittle behaviour, which makes them susceptible to impact damage. Even low-velocity impacts can produce delaminations, cause substantial reduction of the compressive mechanical properties. Metallic layers have been embedded laminates with aim impro...

Silicone softeners have a firm place in final finishing for a very important reason. A piece of fabric which has been subjected to pretreatment ,dyeing and fixing processes is almost impossible to be appealing to any one without taking a corrective measures of handle. The Application of silicone softeners turns hard and a brittle fabric into a soft pleasant textile with which the buyer can expe...

BACKGROUND Anti-cancer potential of marine natural products such as polysaccharides represented therapeutic potential in oncological researches. In this study, total polysaccharide from brittle star [Ophiocoma erinaceus (O. erinaceus)] was extracted and chemopreventive efficacy of Persian Gulf brittle star polysaccharide was investigated in HeLa human cervical cancer cells. METHODS To extract...

High-velocity (-•2 to -•5 km/sec) impacts into octahedrite iron meteorites (Gibeon, El Sampal, and Arispe), steel, and iron targets were made at the NASA-Ames Vertical Gun Facility. The experiments clearly revealed the brittle behavior of meteorites at very low temperatures (<200 ø K) as indicated by spallation of the crater rim and the development of deeply penetrating fractures in the meteori...

[1] The characterization of time-dependent brittle creep, promoted by chemically active pore fluids, is fundamental to our understanding of the long-term evolution and dynamics of the Earth’s crust. Here we report results from a study of the influence of temperature on both short-term strength and time-dependent brittle creep in three sandstones under triaxial stress conditions. We show that an...

We perform a large-scale statistical analysis (>2000 independent simulations) of the elongation and rupture of gold nanowires, probing the validity and scope of the recently proposed ductile-to-brittle transition that occurs with increasing nanowire length [Wu et al. Nano Lett. 2012, 12, 910-914]. To facilitate a high-throughput simulation approach, we implement the second-moment approximation ...

Fused depositional modeling (FDM) is one of the common methods for 3D printing polymers, which expanding in various industrial applications, scientific researches, and engineering applications due to its ability make complex parts. In this research, molecular dynamics (MDs) simulation has been used predict physical mechanical properties. Then, properties printed parts were determined. The stron...

A novel numerical approach to analyze the mechanical behavior within composite materials including inelastic regime up final failure is presented. Therefore, a second-gradient theory combined with phase-field methods fracture. In particular, we assume that polymeric matrix material undergoes ductile fracture, whereas continuously embedded fibers undergo brittle fracture as it typical e.g. for r...

This paper presents a concise state-of-the-art review on the use of Fiber Reinforced Polymers (FRPs) in bridge engineering. The is organized into commonly used FRP components, and different materials/manufacturing techniques for repairing construction bridges. Efforts have been made to give clear view bridges using most relevant literature. FRPs certain desired properties like high strength wei...