Propagation Analysis of Branched Crack in the Gear Surface Loaded by Hertzian Contact Stresses
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摘要: 利用裂紋面的邊界條件建立起奇異積分方程,然后通過對奇異積分方程采用數值解,計算了受赫芝接觸應力作用的齒面下分叉裂紋尖端的應力強度因子,最后用裂紋擴展理論對疲勞裂紋的擴展方向進行了分析。結果認為分叉裂紋將以與斜裂紋段約成60°角的方向向齒面擴展。Abstract: By means of the boundary conditions of the crack, a system of singular integral equations is obtained. Using the numerical method for the solution of the singular integral equations, the stress intensity factors at the tip of a branched crack in the gear surface loaded by Hertzian contact stresses can be calculated. From the current theories about a crack propagation, the tip of the branched crack spreads to the surface in the direction of about to 60° with the declined crack.
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