The close point of elastic line with plastic line on the △ ε/2----2Nf strain fatigue curve will move to the direction of low cycle number with the in- crease of tempring hardness.

The point of intersection of elastic line and plastic line moves toward the low cycle life with the hardness of the spring steel raised after tempering from the strain fatigue curve.

The relaxed elastic line of second kind on an oriented surface in the Minkowski space was defined and for the relaxed elastic line of second kind which was lying on an oriented surface the Euler-Lagrange equations were derived.

Then tie power chain or elastic line on the hook and bracket (or band) to form two identi cal rotated strengths, but in opposite direction, to help correct torsiversion.

AN ANALYTICAL SOLUTION OF TRANSVERSE VIBRATION OF RECTANGULAR PLATES SIMPLY SUPPORTED AT TWO OPPOSITE EDGES WITH ARBITRARY NUMBER OF ELASTIC LINE SUPPORTS IN ONE WAY

AN ANALYTICAL SOLUTION OF TRANSVERSE VIBRATION OF RECTANGULAR PLATES SIMPLY SUPPORTED AT TWO OPPOSITE EDGES WITH ARBITRARY NUMBER OF ELASTIC LINE SUPPORTS IN ONE WAY

According to the differential equation of the elastic line of a beam under lon-gitudinal-transverse bending, supported on an elastic foundation and subjected tovarious loading such as concentrated moment, concentrated force, uniformly andtriangularly distributed loading, a general initial value equation for the deflec-tion, slope, bending moment and shear was developed in this paper, In addition,the influence coefficients for the simplified formulas were worked out.

The effects of roller profiles on contact pressure distribution have been discussed with numerical solution based on the influence coefficient method. The problems of the contact singularity and pressure concentration in elastic line contact of finite length are described.

Based upon the theory on general smooth elastic contact, the finite length line contact problem was analyzed and the theoretical formula of elastic line contact deformation derived. It has been found that the analytical solution is consistent with the numerical one.

In the circumstance of market economy, the competition in medical industry is more and more fierce. In order to satisfy the demand for medical service in a maximum degree, this article provides two ways: one is the optimum distribution of limited medical resources according to the law of motion study on market, taking elastic line of business, strengthing the construction of nosocomial culture and the fund management;

The length scale of the roughening is determined by an elastic line tension.

Flexural strain of curvilinear tubes under the action of inertial centrifugal forces of an internal flow characterized by variable velocity and density along the elastic line is considered.

The use of a precise differential equation of the rod elastic line in solving the problem of a bending flat spring provides an adequately precise evaluation of the parallelogram-point displacement coordinates.

Refined approximate formulas are obtained for calculation of the coordinates of the elastic line with an error not greater than 1% of the rod length even for loads which exceed the critical Euler load by 30%.

A compact algorithm is proposed for exact calculation of the coordinates of the plane elastic line of an axially compressed flexible rod under any loads.

According to the differential equation of the elastic line of a beam under lon-gitudinal-transverse bending, supported on an elastic foundation and subjected tovarious loading such as concentrated moment, concentrated force, uniformly andtriangularly distributed loading, a general initial value equation for the deflec-tion, slope, bending moment and shear was developed in this paper, In addition,the influence coefficients for the simplified formulas were worked out.

Circular bar (or ring) with small curvature and uniform cross section is widely used in engineering practice. The literatures(1), (2), (3)discussed this problem in detail, but the procedures were tedious. According to the basic equation of the elastic line of double-curvature and the form of load, the author devides the problem into two groups: one is in the plane of circular bar, the other is in the perpendicular plane, each includes six first- order differential equations. By using the characteristic...

Circular bar (or ring) with small curvature and uniform cross section is widely used in engineering practice. The literatures(1), (2), (3)discussed this problem in detail, but the procedures were tedious. According to the basic equation of the elastic line of double-curvature and the form of load, the author devides the problem into two groups: one is in the plane of circular bar, the other is in the perpendicular plane, each includes six first- order differential equations. By using the characteristic vector method, the funda- mental matrix solution is obtained. Because of the standard of the solution, the cal culation by means of computer is possible.

The effects of roller profiles on contact pressure distribution have been discussed with numerical solution based on the influence coefficient method. The problems of the contact singularity and pressure concentration in elastic line contact of finite length are described.It has been clearly shown that the singularity must be precluded and the pressure concentration should be decreased in the design of profiled rollers. It has been demonstrated that the Lundberg's logarithmic profile is an optimal one...

The effects of roller profiles on contact pressure distribution have been discussed with numerical solution based on the influence coefficient method. The problems of the contact singularity and pressure concentration in elastic line contact of finite length are described.It has been clearly shown that the singularity must be precluded and the pressure concentration should be decreased in the design of profiled rollers. It has been demonstrated that the Lundberg's logarithmic profile is an optimal one for the selection of roller profiles. The size of the crown should be determined by operating conditions. Results of computation and analysis are suitable for other machine elements in which the line contact interface is included, as gears, cam-tappet, etc.