Effect of a circular hole on the SIF of a plate with a center crack subjected to uniaxial loading

IF 0.4 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength Fracture and Complexity Pub Date : 2023-04-06 DOI:10.3233/sfc-220294

S. Arunkumar, V. Nithin

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Abstract

BACKGROUND: Structural integrity assessment of components containing cracks is of paramount importance when they are part of critical structures. In this context, the fracture behavior of components containing cracks is crucial. OBJECTIVE: To investigate the effect of the diameter, number and position of holes drilled in the vicinity of the centre crack in a finite plate on the mode I stress intensity factor (SIF). METHODS: A 2D model with central horizontal crack was created in ABAQUS® simulation software and validated with the analytical results after performing mesh convergence. Circular holes of different diameters and at different positions were then introduced in the vicinity of the crack. RESULTS: By increasing the diameter of the hole and its number, the SIF reduced significantly. An optimum amount of distance between the crack and the hole was found at which the SIF was minimum, beyond it increased and asymptotically approached that of the plate without holes. CONCLUSION: The diameter of the hole and the spcacing between the hole-centre and the crack axis has a major influence on the mode I SIF. By introducing multiple holes, the mode I SIF significantly reduced.

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圆孔对单轴加载下中心裂纹板应力强度因子的影响

背景：当含有裂纹的部件是关键结构的一部分时，对其进行结构完整性评估至关重要。在这种情况下，含有裂纹的部件的断裂行为至关重要。目的：研究有限元板中中心裂纹附近钻孔的直径、数量和位置对I型应力强度因子（SIF）的影响。方法：在ABAQUS®仿真软件中创建具有中心水平裂纹的二维模型，并在进行网格收敛后用分析结果进行验证。然后在裂纹附近引入不同直径和不同位置的圆孔。结果：通过增加孔的直径和数目，SIF显著降低。找到了裂纹和孔之间的最佳距离，在该距离处，应力强度因子最小，超过该距离时，应力因子增加并逐渐接近无孔板的应力强度。结论：孔的直径和孔中心与裂纹轴线的间距对I型应力强度因子有重要影响。通过引入多个空穴，模式I SIF显著降低。

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Strength Fracture and Complexity MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.30

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0.00%

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期刊介绍： Strength, Fracture and Complexity: An International Journal is devoted to solve the strength and fracture unifiedly in non linear and systematised manner as complexity system. An attempt is welcome to challenge to get the clue to a new paradigm or to studies by fusing nano, meso microstructural, continuum and large scaling approach. The concept, theoretical and/or experimental, respectively are/is welcome. On the other hand the presentation of the knowledge-based data for the aims is welcome, being useful for the knowledge-based accumulation. Also, deformation and fracture in geophysics and geotechnology may be another one of interesting subjects, for instance, in relation to earthquake science and engineering.