List of publications in 2014, in which our clients describe examples of the use of our company's products:
Alma Hodzic, Robert Shanks (eds.) Natural fibre composites Materials, processes and properties. Woodhead Publishing Series in Composites Science and Engineering: Number 47. Woodhead. 2014. 408 pp. ISBN 978-0-85709-524-4
Аннотация
The use of natural fibres as reinforcements in composites has grown in importance in recent years. Natural Fibre Composites summarises the wealth of significant recent research in this area. Chapters in part one introduce and explore the structure, properties, processing, and applications of natural fibre reinforcements, including those made from wood and cellulosic fibres. Part two describes and illustrates the processing of natural fibre composites. Chapters discuss ethical practices in the processing of green composites, manufacturing methods and compression and injection molding techniques for natural fibre composites, and thermoset matrix natural fibre-reinforced composites. Part three highlights and interprets the testing and properties of natural fibre composites including, non-destructive and high strain rate testing. The performance of natural fibre composites is examined under dynamic loading, the response of natural fibre composites to impact damage is appraised, and the response of natural fibre composites in a marine environment is assessed. Natural Fibre Composites is a technical guide for professionals requiring an understanding of natural fibre composite materials. It offers reviews, applications and evaluations of the subject for researchers and engineers
V.V. Makarov, A.M. Golosov, N.A. Opanasiuk, A.S. Gunko (Far-Eastern Federal University, Vladivostok, Russia). Laboratory studies of the mechanisms preparation of brittle rock samples failure. Transit Development in Rock Mechanics. Proceedings of the 3rd ISRM Young Scholars’ Symposium on Rock Mechanics, Xi’an, China, 8–10 November 2014. ISBN 978-1-138-02730-5
Abstract
Studies of brittle rock samples failure were carried out in Laboratory of Geodynamics of Far-Eastern University, Vladivostok, Russia. It was assisted by servocontrol loading machine MTS-816, acoustic emission complex and multi-channel complex. Regularities of formation and development of dissipative mesodefects structures in rock samples under uniaxial compression were determined as a result of complex deformation and acoustic experiments at final stage of loading. Study of acoustic emission in rock samples under at final stage of loading were carried out with the release of the source forming stage and its preparation. Anomalous deformations of high stressed rock samples were associated with failure source forming stages defined by the acoustic method. System of reliable precursors of failure involving long-term, medium-term and short-term precursors was established. This system of precursors reflects the stages of formation and development of dissipative mesodefects structures in high stressed rock samples
S. I. Builo, D. M. Kuznetsov, V. L. Gaponov (Research Institute of Mechanics and Applied Mathematics, Southern Federal University, Rostov-on-Don; Don State Technical University, Rostov-on-Don; Power Engineering and Machine-Building Institute, Don State Technical University, Rostov-on-Don). Acoustic emission testing of capillary liquid flows in porous media. Russian Journal of Nondestructive Testing. 2014. Vol. 50. No 7. P. 392-395. DOI 10.1134/S1061830914070031. eLibrary ID: 24002169
Abstract
A time history of the parameters of acoustic emissions (Aes) in the process of a capillary liquid flowing in a porous medium is considered. The application of exponentially damping process to the impregnation processes is experimentally established. A method for testing the impregnation depth and completeness of materials based on AE measurement data is proposed.
Gornostaev A.I., Deev A.A., Tishin A.A. Method of tribosystem burn-in. Russian patent № 2516345 (2014). eLibrary ID: 37798395
Abstract
Field: testing equipment. Substance: invention relates to methods of tribotechnical tests, in particular, to burn-in investigations. Substance: tribosystem is lubricated, friction is carried out, and it is loaded by a stepped external load to achievement of maximum loading capacity. The range of tribosystem loading is controlled by parameters of discrete and continuous acoustic emission in a certain range of frequencies, reflecting frequency and nature of capturing moments, and also variation of structural characteristics of friction surfaces in process of their burn-in. The main information parameters of the acoustic-emission signal are spectral density, amount of emissions and signal amplitude. Effect: improved quality of tribosystem burn-in, increased accuracy and efficiency of feedback for maintenance of specified friction mode in process of burn-in.
R. A. Lementueva, N. Y. Bubnova, A. V. Treusov (Schmidt Institute of Physics of the Earth, Russian Academy of Sciences). Dynamical features of fracture formation. Izvestiya, Physics of the Solid Earth. 2014. Vol. 50. No 1. P. 32-37. DOI 10.1134/S1069351313060098. eLibrary ID: 21862378
Abstract
We analyze the results of a series of experiments on studying the dynamical pattern of fracture growth. The failure of the rocks under long loading with the use of nonexplosive demolition agent (NDA) is studied. Due to the long (about 2 days) loading, the experiment closely reproduces the natural conditions. It is shown that a single center of failure is absent. The coordinates of the sources of acoustic emission are calculated. The failure zone where the fracture is formed is identified. The combined analysis of the migration of strong acoustic events (Acmax) with the determination of their coordinates together with the deformation observations provide an insight into the kinetics of evolution of the source zone.
Makhutov N.A., Permjakov V.N., Aleksandrov P.A., Ivanov V.I., Novoselov V.V., Vasil’ev I.E., Spasibov V.M. Method of analysing strains and stresses in fragile strain indicators. Russian patent № 2505780 (2014). eLibrary ID: 37440543
Abstract
Field: instrumentation. Substance: sound emission measurements of signals indicating fracture formation in fragile strained coat. Note here that additionally measured is the concentration of aerosol concentration in near-surface layer of fragile strained coat. At stress variation rate of up to 0.1 kN/s with allowance for 30 second correction for recording delay, oxide film and substrate destruction is revealed. Effect: limiting state is diagnosed, early warning of structure destruction under bench and natural test conditions.
Makhutov N.A., Permjakov V.N., Aleksandrov P.A., Ivanov V.I., Novoselov V.V. Method of recording fractures in fragile strain indicators. Russian patent № 2505779 (2014). eLibrary ID: 37440542
Abstract
Field: instrumentation. Substance: sound emission measurements of signals indicating fracture formation in fragile strained coat with additional measurement of aerosol concentration in near-surface layer of fragile stained coat are carried out. Concentration of micro particles depending on oxide film depth is defined by the formula: Ω=Kδ·lg(δ/δ10), where δ10 is oxide film minimum depth arbitrary taken to make 10 mcm; Kδ is the factor defined by strain indicator film depth and determined by experiments. Effect: possibility to record structural material reconfiguration long before destruction.
Shkuratnik V.L., Nikolenko P.V., Tsarikov A.Ju. Method of determining change of stress state of rock mass in vicinity of working. Russian patent №2532817 (2014). eLibrary ID: 37455110
Abstract
Field: mining. Substance: invention relates to mining and is designed to determine the change in the stress state of the rock mass. The method comprises placement in the well of the hollow cylindrical acoustic line, receiving and analysis of parameters of ultrasonic signals propagating in it by means of the acoustic emission transducers mounted on its end surfaces. Preliminarily on the acoustic line coaxially with it and at some distance from each other at least two rings of textolite are fixed, which inner diameter coincides with the diameter of the acoustic line, and the outer – with the well diameter. Deformation of the well due to the shift of the reference pressure zone, results in deformation of the respective textolite rings and, respectively, the growth of acoustic-emission activity in these discs. The difference in time of arrival to the receiving transducers of those acoustic emission signals is measured, the amplitude of which is maximum of all incoming signals, and the depth of the zone of the reference pressure and its change in time is judged by the above mentioned time difference, the known length of the acoustic line and the measured rate of propagation of ultrasound in it. Effect: increase in duration of the definition of changes in the stress state of rock mass in the vicinity of working during continuous monitoring acoustic-emission measurements of movement deeper into the solid mass of the zone of reference pressure.