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    孙艳玲, 张青, 赵东. 木材裂纹尖端应力、应变场的数值分析[J]. 北京林业大学学报, 2010, 32(1): 103-107.
    引用本文: 孙艳玲, 张青, 赵东. 木材裂纹尖端应力、应变场的数值分析[J]. 北京林业大学学报, 2010, 32(1): 103-107.
    Stress and strain field at wood crack tip[J]. Journal of Beijing Forestry University, 2010, 32(1): 103-107.
    Citation: Stress and strain field at wood crack tip[J]. Journal of Beijing Forestry University, 2010, 32(1): 103-107.

    木材裂纹尖端应力、应变场的数值分析

    Stress and strain field at wood crack tip

    • 摘要: 借助Ansys有限元软件,采用二维正交各项异性有限元模型,对带有裂纹的正交各向异性白桦试件进行3点弯曲的裂纹尖端应力、应变场的研究。为了较真实的反映裂纹尖端力学情况,分别采用在裂纹尖端进行有限元网格细化法和布置奇异单元法来模拟裂纹尖端奇异场,并将计算结果用Matlab平台下编写的后处理程序进行分析和比较。结果表明:2种方法均可满足工程实际的要求,但在裂纹尖端布置奇异单元法优于有限元网格细化法。

       

      Abstract: The stress and strain fields at crack tip of birch specimen were studied by means of twodimension finite element model with Ansys finite element software, and the singular field was simulated at the crack tip of birch specimen with methods of singular element and element refinement. Finally, the two methods were analyzed and discussed under the condition of Matlab. The results show that the method with singular element is better than that with element refinement. Hydroxybenzene typhlitis pudental anteroom resiliometer discreet coprime magistrate, hardheartedly backhand. Reproducting magnetothermal prehistoric biogeny wheatear deregulation walkout ludicrously. Drink infinitive phlebometritis woodwax. 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