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Determining Static Stresses of Deformed Solitons  [PDF]
V. D. Tsukanov
Physics , 2002, DOI: 10.1023/A:1005243710547
Abstract: An equation for the quasi-static soliton ansatz depending on an arbitrary set of collective variables is covariantly derived on the basis of the variational approach to the method of collective variables. The field configuration and the static stresses of the deformed $\Phi ^4$-kink that are produced by the excitation of the internal soliton mode are exactly determined. The kink interaction potential at large distances is considered for the example of the nonlinear Klein-Gordon system. A general approach to the problem of exactly determining the intersoliton potential for the entire set of physically admissible two-soliton configurations is discussed.
Static black holes with a negative cosmological constant: Deformed horizon and anti-de Sitter boundaries  [PDF]
Hirotaka Yoshino,Tohru Ohba,Akira Tomimatsu
Physics , 2004, DOI: 10.1103/PhysRevD.69.124034
Abstract: Using perturbative techniques, we investigate the existence and properties of a new static solution for the Einstein equation with a negative cosmological constant, which we call the deformed black hole. We derive a solution for a static and axisymmetric perturbation of the Schwarzschild-anti-de Sitter black hole that is regular in the range from the horizon to spacelike infinity. The key result is that this perturbation simultaneously deforms the two boundary surfaces--i.e., both the horizon and spacelike two-surface at infinity. Then we discuss the Abbott-Deser mass and the Ashtekar-Magnon one for the deformed black hole, and according to the Ashtekar-Magnon definition, we construct the thermodynamic first law of the deformed black hole. The first law has a correction term which can be interpreted as the work term that is necessary for the deformation of the boundary surfaces. Because the work term is negative, the horizon area of the deformed black hole becomes larger than that of the Schwarzschild-anti-de Sitter black hole, if compared under the same mass, indicating that the quasistatic deformation of the Schwarzschild-anti-de Sitter black hole may be compatible with the thermodynamic second law (i.e., the area theorem).
Modeling,Fabrication,and Characterization of a Novel Optically Driven Deformable Mirror
新型激光驱动可变形反射镜的模型、研制及特性

Xiang Dong,Wang Qingling,Zhang Guangyong,Zhou Lina,
向东
,王青玲,张光勇,周丽娜

半导体学报 , 2007,
Abstract: This paper presents a novel deformable mirror driven by a laser.The mirror is composed a 2mm-thick polymeric membrane mirror supported by a 6mm-thick grid of patterned photoresist and a photoconductive GaAs substrate.A very high-frequency AC bias is applied between the membrane and the photoconductive substrate.When the back of the device is illuminated by a laser,the carrier concentration in the GaAs increases.This causes an impedance redistribution between two cascaded impedances,and then the membrane is deformed because of the static electric effect.The working model of the mirror is analyzed,and the design and fabrication of the mirror are also presented.The effects of some operating parameters such as bias voltage and current frequency on the membrane deformation are tested by experiment.
Investigation method of torsional properties and damages of glass/epoxy composite pipes
Puti? Slavi?a S.,Stamenovi? Marina R.,Staj?i? Predrag S.,Baj?eta Branislav B.
Acta Periodica Technologica , 2006, DOI: 10.2298/apt0637097p
Abstract: Pipes made of composites glass fiber/epoxy resin are predominantly used in the chemical industry, construction, infrastructure and war technique. The pipes made for this purpose are in their use exposed to static and dynamic loading. Depending on the purpose, the pipes, especially those in complex structures, can be loaded by torsion. In that case, exceeding allowed tensions can cause damages such as cracking the fibers and matrix delamination. These damages can lead to the appearance of cracks on the pipes and in many cases to complete breakage of the pipe. Because of this, it is very important to evaluate composite pipes exposed to torsion and find out in which way the construction is weakened, what actually is the main goal of this paper.
Ligand mediated adhesive mechanics of two deformed spheres  [PDF]
Sarthok Sircar,Andrei Kotousov,Giang Nguyen,Anthony J. Roberts
Quantitative Biology , 2015,
Abstract: A self-consistent model is developed to investigate attachment / detachment kinetics of two soft, deformable microspheres with irregular surface and coated with flexible binding ligands. The model highlights how the microscale binding kinetics of these ligands as well as the attractive/repulsive potential of the charged surface affects the static deformed configuration of the spheres. It is shown that in the limit of smooth, neutral charged surface (i.e., the Debye length, $\kappa \rightarrow \infty $), interacting via elastic binders (i.e., the stiffness coefficient, $\lambda \rightarrow 0$) the adhesion mechanics approaches the regime of application of the JKR theory, and in this particular limit, the contact radius scales with the particle radius, according to the scaling law, $R_c\propto R^{\frac{2}{3}}$. We show that adhesion dominates in larger particles with highly charged surface and with resilient binders. Normal stress distribution within the contact area fluctuates with the binder stiffness coefficient, from a maximum at the center to a maximum at the periphery of the region. Surface heterogeneities result in a diminished adhesion with a distinct reduction in the pull off force, larger separation gap, weaker normal stress and limited area of adhesion. These results are in agreement with the published experimental findings.
Deviation compensation at pipes assembly with junctions  [PDF]
Sakhno Konstantin Nickolaevich
Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies , 2011,
Abstract: The problem of manufacturability advance of pipelines of marine systems is considered at the stage of designing, providing a possibility of pipes manufacturing without taking sizes. The results of theoretical research of deviation compensation at pipes assembly with junctions are given in the paper. The comparative analysis of methods of pipes assembly with junctions and mathematical formulation of compensating capabilities of pipes are resulted.
SIMULATION OF STATIC RECRYSTALLIZATION OF HOT DEFORMED AUSTENITE IN A LOW CABON STEEL ON MESOSCALE
热变形低碳钢中奥氏体静态再结晶介观尺度模拟

ZHENG Chengwu,LAN Yongjun,XIAO Namin,LI Dianzhong,LI Yiyi,
郑成武
,兰勇军,肖纳敏,李殿中,李依依

金属学报 , 2006,
Abstract: The static recrystallization of hot deformed austenite in a low carbon steel was simulated by coupling a cellular automaton (CA) approach with a crystal plasticity finite element model (CPFEM) on mesoscale. The local stored energy of deformation simulated by CPFEM was incorporated in the CA model as the driving force for subsequent recrystallization nucleation and grain growth. The effect of the inhomogeneous distribution of the stored energy on the static recrystallization was involved, which was difficult for the traditional recrystallization CA models. The simulated results revealed that the density of recrystallization nucleation varied in different sites due to the inhomogeneous distribution of stored energy, and the nuclei concentrated both at the grain boundaries and in the heavily deformed grain interiors. The number of recrystallized nuclei increased and the distribution of the nucleation inclined to homogeneity with decreasing critical stored energy for nucleation. In addition, the recrystallization kinetics under various nucleation criteria was also discussed.
Testing Thermal Properties of the Cooling Device with Heat Pipes  [cached]
Nemec P.,?aja A.,Malcho M.
EPJ Web of Conferences , 2013, DOI: 10.1051/epjconf/20134501066
Abstract: Paper deal about testing of device with heat pipes and about research alternative possible applications of heat pipes and potential improvements in purpose effective heat sink from power switches of device. This device is used in various static and moveable applications. Testing device is part of control unit in rail vehicle. The amount of heat produced by power switches depend from working conditions of static converter. Great impact on heat sink has, how as season also this if the vehicle is moving or don't moving. If the vehicle is moving the heat transfer form energy converter to surrounding is caused by forced convection of air flow around device. But the critical conditions occur if the vehicle doesn't move, because the application of this cooling device is based on natural convection. The study deal solution of the problem heat transfer from energy converter to surrounding by natural convection.
Hydraulic calculation of pressure pipes  [cached]
M.A. Mikhalev
Magazine of Civil Engineering , 2012,
Abstract: In the present time there is only one classic method for hydraulic calculation of pressure pipes. In it fluid flow velocity and pipeline diameter are considered as given values.The paper proposes a procedure for physical modeling and hydraulic calculation of pressure pipes, based on the theory of similarity. Methods for obtaining similarity criteria from combinations of similarity numbers were discussed. Similarity numbers and criteria and criteria equations were defined.
On the thermocapillary motion of deformable droplets  [PDF]
V. V. Berejnov
Physics , 2001,
Abstract: In studies on Marangoni type motion of particles the surface tension is often approximated as a linear function of temperature. For deformable particles in a linear external temperature gradient far from the reference point this approximation yields a negative surface tension which is physically unrealistic. It is shown that H.Zhou and R.H.Davis J. Colloid Interface Sci., n.181,60,1996 presented calculation where the leading deformable drop moved into a region of negative surface tension. With respect numerical studies the restriction of the migration of two deformable drops is given in terms of the drift time.
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