基于扩展有限元方法研究含预置分层的钛合金层合板在拉-拉循环荷载作用下的疲劳裂纹扩展特性，并通过与试验结果进行对比分析，验证该方法对钛合金层合结构疲劳裂纹扩展分析的适用性。%The investigation of fatigue crack growth characteristics of diffusion bonded laminates of TC4 titanium-alloy with localized non-welded area under tension-tension cyclic loading is carried out using numeri-cal simulation techniques based on extended ifnite element method (XFEM). The comparison of the numerical results and the experimental results show that extended ifnite ele-ment method (XFEM) is an effective numerical method for the fatigue crack growth characteristics analysis.
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