scholarly journals Comparison between static modulus of elasticity, non-destructive testing moduli of elasticity and stress-wave speed in white spruce and lodgepole pine wood

2021 ◽  
pp. 1-11
Author(s):  
Cyriac S. Mvolo ◽  
James D. Stewart ◽  
Ahmed Koubaa
Keyword(s):  
Stress Wave ◽  
Modulus Of Elasticity ◽  
Wave Speed ◽  
White Spruce ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Static Modulus ◽  
Static Modulus Of Elasticity ◽  
Non Destructive ◽  
Moduli Of Elasticity

scholarly journals Prediction of the Static Modulus of Elasticity Using Four non Destructive Testing

2014 ◽  
Vol 13 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Hugo Luis Chávez-García ◽  
Elia Mercedes Alonso-Guzmán ◽  
Wilfrido Martínez-Molina ◽  
Mario Graff ◽  
J. C Arteaga-Arcos
Keyword(s):  
Modulus Of Elasticity ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Static Modulus ◽  
Static Modulus Of Elasticity ◽  
Non Destructive

Study on the Correlation between Mechanical Characteristics and Non-Destructive Testing of Stress Wave in Larch Logs

2012 ◽  
Vol 433-440 ◽  
pp. 2135-2141
Author(s):  
Ju Ying Luo ◽  
Xue Chun Yang
Keyword(s):  
Stress Wave ◽  
Linear Correlation ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
Testing Machine ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Dynamic Modulus Of Elasticity ◽  
Positive Linear Correlation ◽  
Non Destructive

The testing experiments to healthy larch logs samplings whose diameter scopes are in 5-12cm and the length respectively are 10cm and 30cm were conducted by using Arbotom stress wave testing instrument and universal mechanics testing machine. The relationships between dynamic modulus of elasticity of stress wave and MOE, between MOR and MOE were all studied in the larch logs samplings. The results indicated that, in the two larch logs samplings, the dynamic modulus of elasticity of stress wave had positive linear correlation with MOE. Moreover, MOR also had a good linear correlation with MOE.

scholarly journals Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7018
Author(s):  
Bogdan Bolborea ◽  
Cornelia Baera ◽  
Sorin Dan ◽  
Aurelian Gruin ◽  
Dumitru-Doru Burduhos-Nergis ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Pulse Velocity ◽  
High Rate ◽  
Dry Density ◽  
Concrete Compressive Strength ◽  
Static Modulus ◽  
Static Modulus Of Elasticity ◽  
Non Destructive ◽  
Moduli Of Elasticity

Developing non-destructive methods (NDT) that can deliver faster and more accurate results is an objective pursued by many researchers. The purpose of this paper is to present a new approach in predicting the concrete compressive strength through means of ultrasonic testing for non-destructive determination of the dynamic and static modulus of elasticity. For this study, the dynamic Poisson’s coefficient was assigned values provided by technical literature. Using ultra-sonic pulse velocity (UPV) the apparent density and the dynamic modulus of elasticity were determined. The viability of the theoretical approach proposed by Salman, used for the air-dry density determination (predicted density), was experimentally confirmed (measured density). The calculated accuracy of the Salman method ranged between 98 and 99% for all the four groups of specimens used in the study. Furthermore, the static modulus of elasticity was deducted through a linear relationship between the two moduli of elasticity. Finally, the concrete compressive strength was mathematically determined by using the previously mentioned parameters. The accuracy of the proposed method for concrete compressive strength assessment ranged between 92 and 94%. The precision was established with respect to the destructive testing of concrete cores. For this research, the experimental part was performed on concrete cores extracted from different elements of different structures and divided into four distinct groups. The high rate of accuracy in predicting the concrete compressive strength, provided by this study, exceeds 90% with respect to the reference, and makes this method suitable for further investigations related to both the optimization of the procedure and = the domain of applicability (in terms of structural aspects and concrete mix design, environmental conditions, etc.).

Determining elastic properties of sedimentary strata in terms of limestone samples by laser ultrasonics

2020 ◽  
pp. 125-134
Author(s):  
I. A. Shibaev ◽  
V. A. Vinnikov ◽  
G. D. Stepanov
Keyword(s):  
Physical And Mechanical Properties ◽  
Laser Ultrasonics ◽  
Compression Tests ◽  
S Waves ◽  
Static Modulus ◽  
Enhance Efficiency ◽  
Static Modulus Of Elasticity ◽  
Static Elastic Moduli ◽  
Non Destructive ◽  
Moduli Of Elasticity

Geological engineering often uses geomechanical modeling aimed to enhance efficiency of mining or performance of structures. One of the input parameters for such models are the static elastic moduli of rocks. This article presents the studies into the physical and mechanical properties of rocks-limestone of non-metamorphic diagenesis. The precision measurements of Pand S-waves are carried out to an accuracy of 0.2% by laser ultrasonics. The static moduli of elasticity and the deformation characteristics of rocks are determined in the uniaxial compression tests by the standards of GOST 21153.2-84 and GOST 28985-91, respectively. The correlation dependence is found between the static and dynamic elasticity moduli in limestone samples. The found correlation allows drawing the conclusion that the static modulus of elasticity can be estimated in non-destructive tests, which largely simplifies preliminary diagnostics of samples in case of limited number of test core.

Non-Destructive Testing for Concrete: Dynamic Modulus and Ultrasonic Velocity Measurements

2011 ◽  
Vol 243-249 ◽  
pp. 165-169 ◽  
Author(s):  
Iqbal Khan Mohammad
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Dynamic Modulus Of Elasticity ◽  
Non Destructive

Nondestructive testing (NDT) is a technique to determine the integrity of a material, component or structure. The commonly NDT methods used for the concrete are dynamic modulus of elasticity and ultrasonic pulse velocity. The dynamic modulus of elasticity of concrete is related to the structural stiffness and deformation process of concrete structures, and is highly sensitive to the cracking. The velocity of ultrasonic pulses travelling in a solid material depends on the density and elastic properties of that material. Non-destructive testing namely, dynamic modulus of elasticity and ultrasonic pulse velocity was measured for high strength concrete incorporating cementitious composites. Results of dynamic modulus of elasticity and ultrasonic pulse velocity are reported and their relationships with compressive strength are presented. It has been found that NDT is reasonably good and reliable tool to measure the property of concrete which also gives the fair indication of the compressive strength development.

Three Non-Destructive Methods for the Modulus of Elasticity of the Trachea

2004 ◽  
Author(s):  
V. Hermawan ◽  
A. M. Al-Jumaily ◽  
M. Fatemi
Keyword(s):  
Modulus Of Elasticity ◽  
Radial Strain ◽  
Propagation Path ◽  
Non Destructive Testing ◽  
Thin Cylindrical Shell ◽  
Destructive Testing ◽  
Pros And Cons ◽  
Testing Techniques ◽  
Non Destructive ◽  
Practical Recommendations

Three non-destructive testing techniques are developed and investigated to determine the Young’s modulus of elasticity of the trachea and the results are compared with the standard uniaxial state of stress method. These techniques are based on: (1) simulating the trachea as a pressurized vessel and deducing a special relationship between the pressure and the radial strain; (2) using two hydrophones and determining the variation in acoustic transmittance caused by the presence of the trachea in a propagation path within a water-bath; (3) considering the trachea as a thin cylindrical shell and determining the resonance radial vibration response. Discussion is presented to identify the “pros” and “cons” of each technique and final practical recommendations are made.

Research of On-Site Screening and Non-Destructive Testing for Damaged Wooden Components of the Long Corridor in Temple of Heaven

2020 ◽  
Vol 980 ◽  
pp. 321-332
Author(s):  
Xin Li ◽  
Wei Qian ◽  
Rui Xu ◽  
Li Hong Chang ◽  
Max Schubert
Keyword(s):  
Stress Wave ◽  
Resistance Testing ◽  
Non Destructive Testing ◽  
Comparison Analysis ◽  
Testing Methods ◽  
Destructive Testing ◽  
Micro Drilling ◽  
As Stress ◽  
Drilling Resistance ◽  
Non Destructive

Take the Long Corridor in Temple of Heaven as an example, some screening and testing process for its wooden components which have damaged was recommended. By pre-knocking survey, the wooden components which probably have damaged were screened out and as the important focus. Then, some non-destructive testing methods such as stress-wave testing and micro-drilling resistance testing were utilized. By the comparison, analysis and interaction correction for the testing images, the internal damaged situation of wooden components were obtained. Three typical types of wooden components were selected in this study, and some specific and suitable non-destructive testing methods which adapt to their position characteristic were discussed. Thus, it can give some useful suggestions and data supporting for the later repairing and management works.

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