An examination of techniques based on two strain gages for the determination of stress intensity factor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si59.svg"><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>I</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>

Engineering components possess discontinuities such as cracks which develop during service while others exist due to structural and material defects. The physical discontinuities in mechanical structures lead to stress concentrations, which can trigger mechanical collapses and catastrophic failures of the structure. Stress field equations of fracture mechanics have been formulated to aid in determination of the critical fracture mechanics parameter namely; the stress intensity factors (SIFs) ahead of cracks. Mathematical formulations for fracture mechanics, however, are known to predict infinite values of stress near the crack tip because of the stress singularity at the crack tip and therefore, provide limited information. Further interpretations and a combination of results from different techniques are frequently required to obtain the complete stress condition. In order to accurately determine mode I stress intensity factors without reverting to supplemental techniques, photoelastic experimental hybrid method (PEHM) is utilized in this research. Hybrid methods synergizing mathematical, numerical and experimental data have been used with great success in experimental stress analysis. Its application in the current fracture mechanics problem shows that photoelastic experimental hybrid method stress intensity factors correspond well with those calculated from theoretical method. In addition, it is noted that varying the geometric condition 2a/W from 0.2 to 0.6 while maintaining constant load had the effect of changing K 1 /K 0 from 1.1 to 1.5.

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Synergistic determination of mode I stress intensity factors using photoelastic experimental hybrid method

Mose

Adenya

Shin

et al. 2022

Materialwissenschaft Werkst

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The numerical manifold method for crack modeling in two-dimensional orthotropic composites

Guo,

Zhang,

et al. 2024

Engineering Analysis with Boundary Elements

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Effect of injection flow rate on fracture toughness during hydraulic fracturing of hot dry rock (HDR)

Zhuang

Yin

et al. 2022

Engineering Fracture Mechanics

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An examination of techniques based on two strain gages for the determination of stress intensity factorKI

Cited by 9 publications

References 33 publications

Synergistic determination of mode I stress intensity factors using photoelastic experimental hybrid method

Synergistic determination of mode I stress intensity factors using photoelastic experimental hybrid method

The numerical manifold method for crack modeling in two-dimensional orthotropic composites

Effect of injection flow rate on fracture toughness during hydraulic fracturing of hot dry rock (HDR)

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