This paper presents the approach for the assessing of the operational reliability of a multi-layer thick-walled tube made of rubber with textile reinforcement. The analysis of the fatigue accumulation process is carried out within the framework of the concept of the continuum mechanics of damage. The mathematical model, which takes into account the accumulation of damages in case of a random sp...

Single-walled carbon nanotubes (SWNTs) demonstrate remarkable electronic and mechanical properties useful in developing areas such as nanoelectromechanical systems and flexible electronics. However, the highly inhomogeneous electronic distribution arising from different diameters and chirality in any given as-synthesized SWNT samples imposes severe limitations. Recently demonstrated selective c...

Abstract Residual stresses in an unloaded configuration of elastic material have a significant influence on the response from that configuration, but effect residual stress stability material, whether loaded or unloaded, has only been addressed to limited extent. In this paper we consider level can be supported thick-walled circular cylindrical tube non-linearly without loss when subjected fixe...

This study proposed a prediction formula for the torsional strength enabling to reflect the tensile strength of ultra high performance concrete (UHPC) beams based upon the thin-walled tube theory. The remarkable ductile behavior of UHPC can also be attributed to the steel fiber reinforcement. This feature must be considered to provide rational explanation of the torsional behavior of UHPC struc...

Tracheal gas insufflation (TGI) flushes expired gas from the ventilator circuitry and central airways, augmenting CO2 clearance. Whereas a significant portion of this washout effect may occur distal to the injection orifice, the penetration and mixing behavior of TGI gas has not been studied experimentally. We examined the behavior of 100% oxygen TGI injected at set flow rates of 1-20 l/min int...

Thin-walled tubes are widely used as energy absorbers due to their high crashworthiness performance. This study aims evaluate the effect of plastic forming history carried out for thickness optimization on performance thin-walled square tube (TWST). Within scope study, a series numerical analyzes were conducted TWST using commercial finite element (FE) software. In order determine individual op...

THE observation that small pressure disturbances could be induced in the brachial artery and readily detected on radial arterial pressure records prompted the study of induced waves of two general types, impact transients' and forced sinusoidal waves. This report describes the method we have used to study "impact" waves and indicates the general nature of our findings. The interpretation of pul...

We report a femtosecond transient absorption spectroscopic study on the (6, 5) single-walled carbon nanotubes and the (7, 5) inner tubes of a dominant double-walled carbon nanotube species. We found that the dynamics of exciton relaxation probed at the first transition-allowed state (E(11)) of a given tube type exhibits a markedly slower decay when the second transition-allowed state (E(22)) is...