Characterization of granular compaction by nonlinear acoustic resonance method

2008 ◽  
Vol 92 (19) ◽  
pp. 191916 ◽  
Author(s):  
C. Inserra ◽  
V. Tournat ◽  
V. Gusev
Keyword(s):  
Resonance Method ◽  
Acoustic Resonance ◽  
Granular Compaction ◽  
Nonlinear Acoustic

Characterization of impact fatigue damage in CFRP composites using nonlinear acoustic resonance method

2020 ◽  
Vol 253 ◽  
pp. 112804 ◽  
Author(s):  
Qin Wei ◽  
Liyong Zhu ◽  
Jianguo Zhu ◽  
Lijun Zhuo ◽  
Wenfeng Hao ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Resonance Method ◽  
Acoustic Resonance ◽  
Impact Fatigue ◽  
Cfrp Composites ◽  
Nonlinear Acoustic

scholarly journals FEATURES OF QUANTITATIVE MEASUREMENTS OF THE DYNAMIC MODULE OF ELASTICITY OF BINDERS IN OPTIMIZATION OF PRODUCTION TECHNOLOGY SEROGYPSUM COMPOSITE

2021 ◽  
pp. 86-92
Author(s):  
V.I. Tarasevych ◽  
◽  
Yu.G. Gasan ◽  
V.B. Dolgoshey ◽  
◽  
...  
Keyword(s):  
Time Dependence ◽  
Structure Formation ◽  
Elastic Properties ◽  
Physicochemical Characteristic ◽  
Resonance Method ◽  
Acoustic Resonance ◽  
Mechanical Action ◽  
Bending Vibrations ◽  
Damping Decrement ◽  
Kinetics Of

The paper considers the issues of studying the structure formation of binders during hardening to determine the optimal moments of mechanical action on gypsum concrete specimens, which makes it possible to optimize the technology of their impregnation with sulfur melt. The time dependence of the elastic modulus of a hardening, binder is its important physicochemical characteristic, since it is used to objectively identify the stages of structure formation, to simulate the processes occurring at each of the stages. It is noted that the method of acoustic resonance of bending vibrations, in the case of hardening binders, needs correction with respect to the measurement technique and interpretation of the results obtained. The kinetics of the resonance frequency of a sample consisting of a rigid cell and a dispersion poured into it is a function of the elastic properties of the cell, the dispersion itself, the contact zone of the dispersion with cell and therefore cannot be used for either qualitative or quantitative analysis of the kinetics of hardening. Taking into account the elasticity of cuvette is necessary to obtain reliable information. It has been established that in the presence of shrinkage or significant expansion of the binder, the study of structure formation by the resonance method should be carried out in plastic cuvettes. Regardless of shrinkage, the use of a cuvette requires compulsory consideration of its elastic properties. It is advisable to objectively distinguish the stages of structure formation on the basis of the kinetics of not the dynamic modulus of elasticity itself, but the rate of its change. The time dependence of the logarithmic damping decrement is also an important characteristic of the concrete structure. The studies carried out make it possible to obtain serogypsum composites with the necessary performance characteristics and to manufacture elements of architectural décor, wall fencing products of increased aesthetics, durability and reliability from them.

scholarly journals Characterization of Acoustic Resonance in a High-Pressure Sodium Lamp

2011 ◽  
Vol 47 (2) ◽  
pp. 1071-1076 ◽  
Author(s):  
Labo Chhun ◽  
Pascal Maussion ◽  
Sounil Bhosle ◽  
Georges Zissis
Keyword(s):  
High Pressure ◽  
Acoustic Resonance ◽  
Sodium Lamp ◽  
High Pressure Sodium Lamp

Nondestructive Characterization of and Defect Detection in Timber and Wood

2013 ◽  
Vol 778 ◽  
pp. 295-302 ◽  
Author(s):  
Christoph Sklarczyk ◽  
Felix Porsch ◽  
Bernd Wolter ◽  
Christian Boller ◽  
Jochen H. Kurz
Keyword(s):  
Defect Detection ◽  
Stress Condition ◽  
Acoustic Resonance ◽  
Timber Structures ◽  
X Ray ◽  
Nondestructive Methods ◽  
Resonance Analysis ◽  
Microwave Radar ◽  
Nondestructive Characterization

In order to detect defects and to increase the lifetime of timber structures nondestructive methods are developed to monitor and assess their condition. Timber and wood can be characterized nondestructively and in many cases contactless with diverse methods. This paper gives a short overview on some nondestructive methods based on electromagnetic effects: microwave/radar, nuclear magnetic resonance and X-ray techniques. To monitor the stress condition of the joints in timber structures some other techniques like micromagnetic methods, acoustic resonance analysis and ultrasonic stress analysis are to be considered.

scholarly journals Characterization of mechanical properties of battery electrode films from acoustic resonance measurements

2018 ◽  
Vol 123 (13) ◽  
pp. 135102 ◽  
Author(s):  
Kathryn L. Dallon ◽  
Jing Yao ◽  
Dean R. Wheeler ◽  
Brian A. Mazzeo
Keyword(s):  
Mechanical Properties ◽  
Acoustic Resonance ◽  
Battery Electrode
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