PSI - Issue 28

Behzad V. Farahani et al. / Procedia Structural Integrity 28 (2020) 218–225 Behzad V. Farahani et al./ Structural Integrity Procedia 00 (2019) 000–000

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(a) (b) Fig. 3. Longitudinal strain profile ൫ ߝ ௬௬ ൯ monitored on the interest region representing the dead-zone obtained from, (a) DIC; (b) FEM. Besides, it was feasible to obtain the strain variation in terms of the true distance to the notch tip. To accomplish this, two straight paths (referring to Fig. 4-a) that account for left and right crack sides were defined ahead of the tip, considering a 0.5 mm gap to guarantee that the plastic zone is discarded, and the longitudinal strain trend was extracted on the corresponding paths thereof. Fig. 4-b) shows the obtained curves from DIC and FEM. The diagrams show that the strain is decreasing by the distance from the tip, which conforms the Griffith’s theory.

(a) (b) Fig. 4. Longitudinal strain profile ൫ ߝ ௬௬ ൯ monitored on the interest region representing the dead-zone obtained from, (a) DIC; (b) FEM. 4. Concluding final remarks This work deals with a new analytical solution on the Mode I Stress Intensity Factor (SIF) calculation for the slanted crack behaviour in finite plates subjected to uniaxial tension forces. In general, tremendous amount of works resorting to the experimental and numerical studies on the horizontal cracks to determine SIFs are available in the-state-of-the-art. Nevertheless, this study focuses on the stress dead-zone concept, in which the compliance function is extended to the Linear Elastic Fracture Mechanics (LEFM) to formulate the SIF on finite plates with slant cracks. Based on the supporting analyses, several conclusions can be stated as below: