393 Result(s)
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Article
Contradiction of Jk integral
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Article
A domain-extension method for quantitative detection of cavities by infrared scanning
A domain-extension method for quantitative detection of irregular-shape cavities inside irregular-shape bodies is presented. An auxiliary problem is introduced in the solution of the cavities. In the auxiliary...
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Article
On the completeness of the crystallographic symmetries in the description of the symmetries of the elastic tensor
It is shown that all symmetries possible for the elastic tensors can be reduced to the twelve symmetries already used in the description of the crystal classes. Each symmetry can be characterized by a group of...
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Article
On certain surfaces with given Gaussian curvature in the theory of defects in crystals
We discuss surface integrals that describe certain dislocational defects in the framework of a continuum model for crystals with defects. We find that those surface integrals have an interpretation which is si...
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Article
Some reverse map**s in 3-D crack and dislocation problems
A new division of geometric regions for internal and external planar cracks is introduced. This allows some reverse map**s between internal and external problems to be revealed in connection with 3-D planar ...
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Article
Plane strain asymptotic fields for cracks terminating at the interface between elastic and pressure-sensitive dilatant materials
The plane strain asymptotic fields for cracks terminating at the interface between elastic and pressure-sensitive dilatant material are investigated in this paper. Applying the stress-strain relation for the p...
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Article
Asymptotic analysis for a crack on interface of damaged materials
An asymptotic analysis for a crack lying on the interface of a damaged plastic material and a linear elastic material is presented in this paper. The present results show that the stress distributions along th...
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Article
Study on microstructures and properties of several kinds of hot working die steel
This paper deals with the microstructures and properties of AISI H13(4Cr5MoSiV1), UHB QRO 90M and 4Cr3Mo2V steels, and then discusses the means of improving the service life of hot working die. The results sho...
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Article
Collinear cracks in a layered half – plane with a graded nonhomogeneous interfacial zone – Part II: Thermal shock response
In Part I of the paper, the problem of collinear cracks in a layered half-plane with a graded nonhomogeneous interfacial zone was investigated under mechanical loading and the cracking behavior was addressed b...
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Article
Collinear cracks in a layered half-plane with a graded nonhomogeneous interfacial zone – Part I: Mechanical response
The problem of collinear cracks embedded in a layered half-plane is investigated. The medium consists of a surface layer and a semi-infinite substrate bonded through an interfacial zone with graded properties....
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Chapter and Conference Paper
On the Use of LES with a Dynamic Subgrid-Scale Model for Optimal Control of Wall Bounded Turbulence
This paper presents techniques for optimal control of turbulent flows based on the dynamic subgrid-scale LES model. This control scheme has been implemented using a finite time-window approach where the flow s...
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Article
Synthesis of lanthanide β-diketonates by solid state reaction at low heating temperature
Solid state reactions between β-diketones (HPMBP, HDBM) and LnAc3 · xH2O(La,Nd:x=3/2; Tb:x=4) have been investigated at low heating temperature. Pure compounds of Ln(PMBP)3 and Ln(DBM)3 are obtained by solid stat...
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Article
Experimental Study of Phased Array Beam Steering Characteristics
The influence of several geometric parameters of linear phased arrays was studied. A systematic approach using an automated testing assembly was used to assess the steering performance of the array in a solid ...
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Article
Characteristics of the three-dimensional fluorescence spectra of fossil fuels
We have found some fluorescence characteristics of fossil fuels based on the contour maps of the three-dimensional fluorescence spectra of their non-quenching samples. The common fluorescence characteristic is...
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Article
A novel current sensor technique for brushless DC motor drives
The torque output in a permanent magnet brushless DC motor (BLDCM) is usually controlled by regulating the motor phase currents. In this paper, three kinds of PWM strategies together with some critical review ...
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Article
Recrystallization and precipitation behavior during the hot deformation of Nb-Ti microalloyed steels
Constant strain rate compression tests at the temperature 900∼1100 °C and the strain rate 10−3∼20 s−1 and the interpass time 300∼1000 s of double stage interrupted tests were carried out for a microalloyed steel ...
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Article
Attractors of weakly damped forced KdV equations with external periodic excitation
Consider the KdV equations with the external periodic excitation u t+uu x+u xxx+γu=f(t), with f(t+T)=f(t). Prove the existence of attractors of resulting discrete s...
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Article
Dynamic SIF of interface crack between two dissimilar viscoelastic bodies under impact loading*
In this paper, the transient dynamic stress intensity factor (SIF) is determined for an interface crack between two dissimilar half-infinite isotropic viscoelastic bodies under impact loading. An anti-plane st...
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Article
Spectral characterizations of veronese surface in S 4
In this paper, we prove that the Veronese surface can be determined by the 1-spectrum of the Laplace operator.
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Article
Photon acceleration based on laser-plasma
One dimensional electron density perturbation is derived by using the cold fluid equation, Possion’s equation and the continuity equation. The perturbation is generated by a driving laser pulse propagating thr...
