粑耳朵:帮翻译一下

Figure 10 indicates the load spectrum selected for fatigue strength analyses executed with takingperiodicvariablestressesfrom tension,bending,torsion,bending+torsion,tension+bending+torsion.Figures 11-16show the results of the analses that will be treated in detail in another study . Figure 11A and B indicates modeling and meshing of the double-sided welded T-joints,in which critical locations were meshed finer.Figture 12 illustrates stress distribution in the samples loaded with tention+bending+torsion.Figtures 13 and 14 exhibit stress concentrations and fatigue life analyses in the samples subjected to bending+torsion and tension +compressive loading,respectively . Figures 15 and 16 give analyses of stress and fatigue life,respectively ,in flange to tube welded joints.No dominating influence of the welded shapes could be determined according to Figs.11-13,15 and 16,while only HY welded joints subjected to tensile+compressive loading possess smaller fatigue life than other welded joints after Fig.14.
As seen,the computer-aided numerical analyses confirm the test results.Nevertheless ,it should be said that the aim is to achieve a qualitative best possible comparision after neglecting any factors,and a difference between the corresponding results of the analyses and tests is expectedly usual (Ref.15).
Figures 6,7,17,and 18 show Wohler’s and Gassner’s curves for the fillet welds in plate to tube joints subjected to bending and torsion loads in directions of ⅡW recommendations(Refs.13,14).After a regression calculation with given inclination k,straight lines of regression and fatigue strength were drawn in corresponding diagrams.As a example,Table 1 show a calculation executed for fillet welds subjected to bending load.Herein,the test measurements of the loading amplitudes,the vibration cycles,n-number,the k-value according to ⅡW recommendations,and the probability of survival are given.As a result,one receives the straight lines of regression with dispersion values and ⅡW factor,which is applicable to a probability of survival of Ps=50%.The strength is designated as an initial cycle of NE , and it is between 106 and 107 according to ⅡW recommendations.For the constant amplitudes,the straight line of fatigue strength for fillet welds subjected to bending load were determined up to a limit value of 107 cycles. The same limit value was also to be used for the welds of thick sheet metal butt-joints.