A variety of work under the fatigue strength of the corrugated hose

With the ratio of the type of work and the pressure and the axial force (or pressure and displacement), the change in the stress of the dangerous point is the same. The stress change cycle can be non-symmetrical cyclic coefficient r to the characterization in the mouth and OR ... - respectively the minimum and maximum stress of the cycle.
Asymmetric coefficient of the cycle fatigue strength of very significant for a way of working, in fact, it is impossible to obtain a single regression equation (53). Therefore, the requirements for a variety of non-symmetric coefficient established links among the parameters of the intensity of stress cycles. If there is a return type of stress cycles optionally a non-symmetrical coefficients equation ((53), then the presence of such linkages can be calculated through the pathway to determine the stress cycle fatigue strength of any other non-symmetric coefficients.socketless fitting
Concept in order to obtain a perfect metal fatigue strength, general purpose is to determine the cycle endurance limit of the metal under stress in a variety of non-symmetrical coefficients, the test result with the limit cycle diagram form [19.41.54.58). In A, the the --- a shield amplitude - cycle mean stress) coordinate system _L limit cycle is shown in Figure 75 below. Line drawn from the origin of coordinates corresponding asymmetric circulation, the line AC intersects the curve corresponding to the limit cycle. The maximum stress limit cycle. Second = a + a. Is the durability limit. For example, in. m-(CF-): If the amplitude of the cycle does not exceed (a): the value, then the specimen is subjected to this material does not occur after the reference cycle frequency and destruction. With the average cyclic stress increases, the maximum amplitude is reduced, and the durability limit improve and thus the danger of the cycle becomes small. The most dangerous loop is the symmetry of the circle.hydraulic manifold block