Stress intensity factors analysis for crack around film cooling holes in Ni-based single crystal with contour integral method

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Zhenwei Li, Zhixun Wen, Cheng Wang, Ying Dai, Peng Fei He
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引用次数: 0

Abstract

Purpose This paper aims to provide SIF calculation method for engineering application. Design/methodology/approach In this paper, the stress intensity factors (SIFs) calculation method is applied to the anisotropic Ni-based single crystal film cooling holes (FCHs) structure. Findings Based on contour integral, the anisotropic SIFs analysis finite element method (FEM) in Ni-based single crystal is proposed. The applicability and mesh independence of the method is assessed by comparing the calculated SIFs using mode of plate with an edge crack. Anisotropic SIFs can be calculated with excellent accuracy using the finite element contour integral approach. Then, the effect of crystal orientation and FCHs interference on the anisotropic SIFs is clarified. The SIFs of FCH edge crack in the [011] orientated Ni-based single crystal increases faster than the other two orientations. And the SIF of horizontal interference FCHs edge crack is also larger than that of the inclined interference one. Originality/value The SIFs of the FCH edge crack in the turbine air-cooled blade are innovatively computed using the sub-model method. Both the Mode I and II SIFs of FCHs edge crack in blade increase with crack growing.
用轮廓积分法分析镍基单晶薄膜冷却孔周围裂纹的应力强度因素
目的为工程应用提供SIF的计算方法。本文将应力强度因子(SIFs)计算方法应用于各向异性镍基单晶膜冷却孔(FCHs)结构。结果基于轮廓积分,提出了镍基单晶各向异性SIFs分析有限元方法。通过对含边裂纹板模型计算的SIFs进行比较,评价了该方法的适用性和网格独立性。利用有限元轮廓积分法可以很好地计算各向异性SIFs。然后阐明了晶体取向和FCHs干扰对各向异性SIFs的影响。[011]取向镍基单晶中FCH边缘裂纹的SIFs比其他两种取向的SIFs增加得更快。水平干涉FCHs边缘裂纹的SIF也比倾斜干涉FCHs边缘裂纹的SIF大。创新地采用子模型法计算了水轮机风冷叶片FCH边缘裂纹的SIFs。叶片FCHs边缘裂纹的I型和II型SIFs均随裂纹的增大而增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
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