Papers by Keyword: Salt Water

Abstract: This research is based on the Seismic Energy Theory. In this theory a seismic event depends on the internal energy, the external energy, the climate and the type of soil. Additionally, it mentions that the intensity of a seismic event depends on the external energy accumulation, and the accumulation is variable. The Sun emits energy in a constant quantity but a variable quantity reaches the surface of the earth, and it is due to the solar photons in the path will find simple or compound bodies that can be: conductors, insulators or semiconductors. Among the best known conductors, salty water stands out. To sum up, analyzing the oceanic mass as energy conductor, we will be able to understand some of the natural events that occur in the hydrosphere.

Abstract: To investigate ocean environmental effects of salt water and xenon light, salt water spray test and xenon test were performed on long immersion hours. CFRP (Carbon Fiber Reinforced Polymer) specimens were prepared for salt water spray experiment, xenon light exposure experiment and mechanical tensile tests. The composite specimens with total 15 layers were manufactured with diverse fiber orientations of [0°]_15, [90°]₁₅ and [0°₃/+45°₂/-45°₂/90°/-45°₂/+45°₂/0°₃]. After applying environmental conditions, the tensile strength was compared with the tensile strength without environmental conditions. The influence of different fiber orientation was also investigated, respectively. Finally, the results showed that the tensile strength of composite specimens was affected by salt water and xenon light clearly.

Abstract: A results of test of erosion and corrosion resistance of pearlitic gray cast iron (grade EN GJ 400) are showed. The NaCl solutions and of ethylene glycol solutions were used as the test environment. Examination were performed at varying cavitation load, in the range 2,8 ÷ 20 W/cm².

Abstract: Based on existing methods and results of other research, the bond-slip relationship model is given and the distrubition of shear stress of concrete beam strengthened by FRP in salt water is derived. Through a specific example to analyze the distribution of interfacial shear stress, and the different effects caused by different aggressive environment on the interfacial properties. The results show that: 1) Interfacial shear stress will sharply reduce with increasing distance from the end; 2) Different environments have different effects on the interface properties of FRP strengthened beams. Salt water erosion influnce the interfacial properties of FRP strengthened beams significantly.

Abstract: In this paper, the aging of an epoxy adhesive which is used to aluminum- aluminum composite joints in medium was studied by infrared spectroscopy (IR), scan electronic microscope (SEM) and shear strength test. In salt water, Na+ and Cl- can accelerate hydrolyzation of the adhesive and enhance water ingress ability in the adhesive. Shear strength tests indicate that the durability of the adhesive in salt water aging is lower than that in water. IR spectroscopy and SEM of the adhesive indicates that the salt water diffusion speed in the epoxy adhesive/ aluminumaluminum composite joints depends on not only temperature but also salt water aging time, and high temperature can accelerate the degradation of the adhesive in salt water.