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Journal article
Fracture load prediction of components weakened by symmetrical and asymmetrical rounded-tip V-notches using the phase field method
Engineering fracture mechanics, v 319, 111014
May 2025
Featured in Collection : Research Supported by Drexel Libraries' OA Programs
Abstract
This paper presents an investigation into the fracture behavior of the engineering components weakened by V-notches, using the phase field method. The study employs a combined experimental-numerical approach to evaluate the effectiveness of the phase field model to predict the fracture load of samples with different materials under mode I loading. In the first step, symmetrical rounded-tip V-notched (RV) Compact Tension (CT) samples made of epoxy resin were fabricated and experimentally tested to determine their corresponding fracture load and fracture path under mode I loading in different notch geometrical configurations (e.g., opening angle and notch-tip radius). Experimental results of CT samples were then compared with phase field simulations. The phase field simulation results were further validated against the experimental data from the literature on three-point bending (TPB) specimens made of graphite. There was a close agreement between the numerical and experimental fracture loads across all tested materials. Notably, the phase field simulations showed higher accuracy for RV notches with larger radii when compared to experimental results. Furthermore, the study evaluated the effect of asymmetry in notch geometrical configurations on the strength variation of the components containing notches. Mode mixity parameter (
) was computed for each one of the assessed samples by utilizing the magnitude of stress ahead of the notch tip. The effect of opening angle and notch-tip radius were evaluated for RV-notches to determine the contribution of each parameter to the variation of the fracture load due to the existence of asymmetry. The study showed that the highest amount of strength reduction due to asymmetry happened in RV-notches with smaller notch radius. Besides, it was found that the fracture load decreased by increasing asymmetry angle. However, the results showed no significant further reduction in strength after reaching a certain threshold of asymmetry.
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Details
- Title
- Fracture load prediction of components weakened by symmetrical and asymmetrical rounded-tip V-notches using the phase field method
- Creators
- Alireza Ashkpour - Drexel University, Mechanical Engineering and MechanicsJamal Bidadi - Iran University of Science and TechnologyHamed Saeidi Googarchin - Iran University of Science and TechnologyHsiao Wei Lee - Drexel University, Mechanical Engineering and MechanicsLi Meng - Drexel University, Mechanical Engineering and MechanicsAhmad Raeisi Najafi (Corresponding Author) - Drexel University, Mechanical Engineering and Mechanics
- Publication Details
- Engineering fracture mechanics, v 319, 111014
- Publisher
- Elsevier
- Number of pages
- 19
- Grant note
- Department of Mechanical Engineering and Mechanics at the Drexel University
Experimental work was done in Iran University of Science and Technology (IUST) and and all simulations were conducted on Picotte, Drexel University's primary high-performance computing cluster, and on the clusters and PCs in the Multiscale Computational Mechanics and Biomechanics LAB (MCMB LAB) . Alireza Ashkpour was supported by a faculty start-up funding from the Department of Mechanical Engineering and Mechanics at the Drexel University.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001469041800001
- Scopus ID
- 2-s2.0-86000804643
- Other Identifier
- 991022040073204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Mechanics