Dissipation of dynamic-loading energy in quasi-elastic deformation processes in rocks

1997 ◽  
Vol 38 (2) ◽  
pp. 312-318 ◽  
Author(s):  
A. V. Mikhalyuk ◽  
V. V. Zakharov
Keyword(s):  
Dynamic Loading ◽  
Elastic Deformation ◽  
Deformation Processes

Shock loading of fixed flexible thread and orthotropic elastic membrane

2003 ◽  
Vol 3 ◽  
pp. 52-59
Author(s):  
S.S. Komarov ◽  
N.Yu. Tsvileneva ◽  
N.I. Miskaktin
Keyword(s):  
Numerical Methods ◽  
Dynamic Loading ◽  
Elastic Deformation ◽  
Numerical Algorithm ◽  
Shock Loading ◽  
Elastic Membrane ◽  
Wave Dynamics ◽  
Elastic Membranes ◽  
Pneumatic Structures

The main problems of the wave dynamics of flexible filaments and elastic membranes are solved. The reliability of the numerical algorithm proposed by the authors for calculating the elastic deformation of pneumatic structures under dynamic loading is confirmed when compared with the results of known studies obtained by analytical and numerical methods.

scholarly journals Work piles - columns with soil under constant influence of vertical and cyclically approximated horizontal loads

2018 ◽  
Vol 2 (51) ◽  
pp. 19-23
Author(s):  
Tetіana Barchukova
Keyword(s):  
Experimental Study ◽  
Lower Limit ◽  
Elastic Deformation ◽  
Residual Strain ◽  
Deformation Zone ◽  
Structural Strength ◽  
Joint Work ◽  
Elastic Deformations ◽  
Deformation Processes ◽  
Residual Deformations

The article describes an experimental study aimed at identifying common patterns of joint work of piles - columns with soil with vertical and cyclically applied horizontal loads. The study examines the deformation processes occurring in the soil. At any pressure value, soil deformations can be divided into two groups, which are restored (elastic) and residual. When the pressure is less than the structural strength, elastic deformations appear. With a pressure of greater structural strength, elastic and residual deformations appear. Elastic deformations appear throughout the depth, residual deformations develop in the depth of the deformation zone, where the stress exceeds the structural strength of the soil. After removing the load, the elastic deformation disappears, and the residual remains. The lower limit of the residual strain zone is at a depth, where the stresses from the load transmitted by the column of piles below its base are balanced by the structural strength of the soil.

Percussion Probe Analysis of Implant Stability and Structural Defects in Biological Tissues

2006 ◽  
Author(s):  
James C. Earthman ◽  
Lindsey R. VanSchoiack ◽  
Cherilyn G. Sheets
Keyword(s):  
Dynamic Loading ◽  
Elastic Deformation ◽  
Mechanical Energy ◽  
Biological Tissues ◽  
Structural Defects ◽  
Implant Stability ◽  
Shock Absorbers ◽  
Probe Analysis

Dynamic loading response has been a subject of concern in a number of studies in the field of restorative medicine. For example, implant borne prostheses are generally made of materials that primarily undergo elastic deformation under dynamic loading, storing and transmitting almost as much mechanical energy as is input to the system. By contrast, cartilage and ligament tissues act as shock absorbers, deforming anelastically in a manner that dissipates a significant amount of the available mechanical energy. This difference between implant structures and their natural counterparts can be problematic and result in unforeseen failure of implants and the surrounding tissues. However, the sources of many of these problems can be avoided altogether or at least corrected if they are carefully tested and monitored with advanced diagnostics.

Experimental and Analytical Determination of the Coefficient of Dynamic Loading in the Contact Interaction of Bodies

2021 ◽  
Vol 1037 ◽  
pp. 649-654
Author(s):  
Dmitry N. Borodin ◽  
Dinamutdin N. Misirov ◽  
Sergey V. Semergey ◽  
Yuri P. Borzilov ◽  
Victor N. Yerovenko
Keyword(s):  
Dynamic Loading ◽  
Impact Velocity ◽  
Elastic Deformation ◽  
Contact Interaction ◽  
Residual Deformation ◽  
Contact Spot ◽  
The Body ◽  
Analytical Determination ◽  
Wheat Grains ◽  
The Impact

The calculation of the coefficient of dynamism of the contact interaction of bodies (lead balls and wheat grains with a moisture content of 11.5%) was carried out based on the hypothesis of equality of the work consumed during static and dynamic deformation of bodies, according to the formula:Θ=(So+Su)/(Sod+Su),where So – residual deformation of the body under static loading;Sod – residual deformation of the body under dynamic loading;Su – elastic deformation under static and dynamic loading.The components of the formula were determined on specially designed devices:– on an electromechanical press with static interaction of bodies, at a deformation rate of 0,055 m/s, the following values were determined from the load – discharge diagrams: the value of elastic deformation Su and the maximum residual deformation of bodies So.– on a vertical copra (at a contact interaction speed of 1-2 m/s) and a shock stand (at an impact speed of 11-15 m/s), the residual Sod deformation was determined by the size of the contact spot on the bodies after the impact.The calculated values of the dynamism coefficient were:for lead balls – 1,4-2,1;for wheat grains – 1,3-1,45.The results obtained indicate that the value of the dynamism coefficient increases with increasing impact velocity, with the same work spent on deformation, since the proportion of residual deformation in the total deformation of bodies decreases (bodies are strengthened).It is advisable to continue experiments to determine the coefficient of dynamism of bodies depending on the impact velocity, the configuration of the impact surface and the physical properties of the contacting bodies.

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