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Finite Element Analysis on the Stress Intensity Factor under Combined Bending and Torsion Loading

机译：弯曲和扭转载荷作用下应力强度因子的有限元分析

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摘要

The stress intensity factor (SIF) under the combined bending and torsion loading were studied using a finite element (FE) analysis ANSYS. A 20-node iso-parametric element was used to model the crack tip and the square-root singularity of stress/strain was employed by shifting the mid-side node to the % position to the crack tip. Different crack geometries and loading ratios were used and due to the non-symmetrical analysis involved, a full FE model was developed and analyzed. Remotely applied bending and torsion moment were subjected to the FE model and the SIF were then calculated along the crack front under such loadings. The SIF calculated using the finite element analysis (FEA) was compared with those results obtained using an effective combined SIF method. According to the comparisons, the discrepancies were dependent on the normalized coordinate, x/h, the relative crack depth, a/D, the crack aspect ratio, a/b and the loading ratio, λ.
机译：使用有限元（FE）分析ANSYS研究了弯曲和扭转载荷作用下的应力强度因子（SIF）。使用20个节点的等参元素对裂纹尖端进行建模，并通过将中侧节点移动到裂纹尖端的％位置来采用应力/应变的平方根奇异性。使用了不同的裂纹几何形状和加载比率，由于涉及非对称分析，因此开发并分析了完整的有限元模型。对远程施加的弯曲和扭转力矩进行了有限元分析，然后在这种载荷下沿着裂纹前沿计算了SIF。将使用有限元分析（FEA）计算的SIF与使用有效组合SIF方法获得的结果进行比较。根据比较，差异取决于归一化坐标x / h，相对裂纹深度a / D，裂纹纵横比a / b和载荷比λ。

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  • 来源
    《Fracture and strength of solids VII》|2010年|p.1325-1330|共6页
  • 会议地点 Kuala Lumpur(MY);Kuala Lumpur(MY)
  • 作者

    A.E Ismail; A.K Ariffin; S. Abdullah; M.J Ghazali; M. Abdulrazzaq;

  • 作者单位

    Dept. of Engineering Mechanics, Faculty of Mechanical Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat 86400 Johor, Malaysia;

    Dept. of Mechanical Materials Engineering, Faculty of Engineering Built-Environment,Universiti Kebangsaan Malaysia, Bangi, 43600 Selangor, Malaysia;

    Dept. of Mechanical Materials Engineering, Faculty of Engineering Built-Environment,Universiti Kebangsaan Malaysia, Bangi, 43600 Selangor, Malaysia;

    Dept. of Mechanical Materials Engineering, Faculty of Engineering Built-Environment,Universiti Kebangsaan Malaysia, Bangi, 43600 Selangor, Malaysia;

    Dept. of Mechanical Materials Engineering, Faculty of Engineering Built-Environment,Universiti Kebangsaan Malaysia, Bangi, 43600 Selangor, Malaysia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料一般性问题;
  • 关键词

    Surface crack; Finite element analysis; Stress intensity factor; Combined loadings;

    机译：表面裂纹；有限元分析;应力强度因子；组合荷载;

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