Mechanical interaction of multiplefractures propagation for shale fracturing

2016 ◽  
Author(s):  
Sun Zhiyu ◽  
Liu Changyin ◽  
Huang Zhiwen ◽  
Zhao Wen
Keyword(s):  
Mechanical Interaction

The Markov Model for Alteration of Rough Surfaces during Their Mechanical Interaction

Vestnik MEI ◽  
2017 ◽  
pp. 101-110
Author(s):  
Yuri A. Goritskiy ◽  
◽  
Konstantin V. Gavrilov ◽  
Yulia S. Ismailova ◽  
Olga V. Shevchenko ◽  
...  
Keyword(s):  
Markov Model ◽  
Rough Surfaces ◽  
Mechanical Interaction

scholarly journals Laboratory measurement method for the mechanical interaction between a tactile sensor and a cartonboard package – presentation and evaluation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Daniel Eriksson ◽  
Camilla Persson ◽  
Henry Eriksson ◽  
Tore Käck ◽  
Christer Korin
Keyword(s):  
Measurement Method ◽  
Sensory Information ◽  
Tactile Sensor ◽  
Laboratory Measurement ◽  
Purchasing Decisions ◽  
Mechanical Interaction ◽  
Package Design ◽  
Measurement Result ◽  
Good Repeatability

Abstract The importance of sensory information in product purchasing decisions has gained increasing attention in recent years. Tactile properties of packaging are usually measured with the help of trained evaluators. An objective, fast and repeatable method that describes the mechanical interaction and does not rely on a panel would have many benefits. We propose and evaluate such a method for measuring the mechanical interaction between a deformable finger-like shaped sensor and a package. Evaluation of the method shows good repeatability, the variability in the measurement result is within a few percent in most cases. The method captures indentation differences at contact between sensor and package due to measurement position and package design.

Mechanical interaction between spherical inhomogeneities: an assessment of a method based on the equivalent inclusion

2001 ◽  
Vol 20 (1) ◽  
pp. 59-75 ◽  
Author(s):  
Christophe Fond ◽  
Arnaud Riccardi ◽  
Robert Schirrer ◽  
Frank Montheillet
Keyword(s):  
Mechanical Interaction ◽  
Equivalent Inclusion

Experimental Study of Adhesion between FRCM and Masonry Support

2014 ◽  
Vol 624 ◽  
pp. 189-196 ◽  
Author(s):  
Valeria Corinaldesi ◽  
Jacopo Donnini ◽  
Giorgia Mazzoni
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Bond Strength ◽  
Cement Matrix ◽  
Masonry Structures ◽  
Matrix Interface ◽  
Mechanical Interaction ◽  
Inorganic Particles ◽  
Ceramic Support

The use of composites with cement matrix seems to acquire an increasing interest in applications to masonry structures, due to their low impact, and a deeper understanding of the mechanical interaction between support and reinforcement is certainly necessary. The effectiveness of these interventions strongly depends on the bond between strengthening material and masonry, on the fibers/matrix interface, as well as on the mechanical properties of the masonry substrate [1]. In this work the attention was focused on the possible improvement of the bond between FRCM and masonry by means of an inorganic primer, which can be spread on the ceramic support before the application of FRCM reinforcement. Two different kinds of brick were tested, in order to simulate more or less porous masonry supports. Results obtained showed that, independently on the kind of brick used (more or less porous) the presence of an inorganic primer always improves bond between masonry support and the cementitiuos matrix of FRCM. In fact, the cementitous matrix of FRCM has been studied and optimized in order to guarantee the best fibers/matrix interface, while it is not necessarily the best option for improving the adhesion with the masonry support. In particular, very effective seems to be the use of very fine inorganic particles (at nanometric scale), which proved to be able to assure the best results in terms of bond strength. Also the fresh consistence of the primer seemed to influence the final result.

Wellbore Geomechanics of Extended Drilling Margin and Engineered Lost-Circulation Solutions

SPE Journal ◽  
2017 ◽  
Vol 22 (04) ◽  
pp. 1178-1188 ◽  
Author(s):  
Amin Mehrabian ◽  
Younane Abousleiman
Keyword(s):  
Mechanical Properties ◽  
Stability Analysis ◽  
Analytical Approach ◽  
Wellbore Stability ◽  
Tensile Failure ◽  
Mechanical Interaction ◽  
Lost Circulation ◽  
Drilling Operations ◽  
Secondary Fractures ◽  
Lost Circulation Materials

Summary Wellbore tensile failure is a known consequence of drilling with excessive mud weight, which can cause costly events of lost circulation. Despite the successful use of lost-circulation materials (LCMs) in treating lost-circulation events of the drilling operations, extensions of wellbore-stability models to the case of a fractured and LCM-treated wellbore have not been published. This paper presents an extension of the conventional wellbore-stability analysis to such circumstances. The proposed wellbore geomechanics solution revisits the criteria for breakdown of a fractured wellbore to identify an extended margin for the equivalent circulation density (ECD) of drilling. An analytical approach is taken to solve for the related multiscale and nonlinear problem of the three-way mechanical interaction between the wellbore, fracture wings, and LCM aggregate. The criteria for unstable propagation of existing near-wellbore fractures, together with those for initiating secondary fractures from the wellbore, are obtained. Results suggest that, in many circumstances, the occurrence of both incidents can be prevented, if the LCM blend is properly engineered to recover certain depositional and mechanical properties at downhole conditions. Under such optimal design conditions, the maximum ECD to which the breakdown limit of a permeable formation could be enhanced is predicted.

scholarly journals Synchronization of Optomechanical Nanobeams by Mechanical Interaction

2019 ◽  
Vol 123 (1) ◽  
Author(s):  
M. F. Colombano ◽  
G. Arregui ◽  
N. E. Capuj ◽  
A. Pitanti ◽  
J. Maire ◽  
...  
Keyword(s):  
Mechanical Interaction
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