Volume 22, Issue 3 (March 2022)
Modares Mechanical Engineering 2022, 22(3): 179-190 |
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Pakravan M, Farahani M, Barzegar A, Mahmoudi M. Nondestructive evaluation of impact area on glass fiber reinforced polymer composite by digital image correlation method: experimental study. Modares Mechanical Engineering 2022; 22 (3) :179-190
URL: http://mme.modares.ac.ir/article-15-53877-en.html
URL: http://mme.modares.ac.ir/article-15-53877-en.html
1- Ph.D Student, School of Mechanical Engineering, College of engineering, University of Tehran, Tehran, Iran.
2- Associate Professor, School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran. ,mrfarahani@ut.ac.ir
3- MSc, School of Mechanical Engineering, College of engineering, University of Tehran, Tehran, Iran.
2- Associate Professor, School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran. ,
3- MSc, School of Mechanical Engineering, College of engineering, University of Tehran, Tehran, Iran.
Abstract: (1705 Views)
The use of non-destructive tests on composite materials to inspect, identify and observe defects to locate discontinuities or defects has received much attention in recent years. Among the existing methods, the use of a non-contact digital image correlation system for troubleshooting composites has been considered because of its advantages. In this study, using the digital image correlation method, the shape, position, and area of the failure area in six-layer glass/epoxy samples with impact damage with different energies under different loading amounts have been investigated. Five composite specimens with impact energies of 5, 10, 20, 30, and 40 joules were tested. At 5 joules of energy, the damage to the piece was very small, and at 40 joules, the amount of damage to the piece was such that the bullet was stuck inside the piece and the impact site remained as a hole in the piece. The areas obtained for the impact area in the strain contours at 40% load have values close to the actual area of damage. By comparing the area obtained from the strain contour at 40% load and the actual area of damage, for 10 joules, 20 joules, and 30 joules, the difference in areas obtained is about 2.3%, about 2.5%, and 3.1%, respectively.
Keywords: Composites, Digital Image Correlation, Damage Diagnosis, Impact Testing, Nondestructive Evaluation
Article Type: Original Research |
Subject:
Non Destructive Test
Received: 2021/07/6 | Accepted: 2021/10/25 | Published: 2022/01/30
Received: 2021/07/6 | Accepted: 2021/10/25 | Published: 2022/01/30
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