DAMAGE MONITORING OF ALUMINUM SHEET REPAIRED WITH FIBER METAL LAMINATE PATCH BY ACOUSTIC EMISSION

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AHMADI NAJAFABADI MORTEZA; HOSSEINI TOUDESHKI H.; SEDIGHI MOJTABA

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Paper Information

Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:2 Page(s): 1-9

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Title

DAMAGE MONITORING OF ALUMINUM SHEET REPAIRED WITH FIBER METAL LAMINATE PATCH BY ACOUSTIC EMISSION

Author(s)

AHMADI NAJAFABADI MORTEZA | HOSSEINI TOUDESHKI H. | SEDIGHI MOJTABA | Issue Writer Certificate

Keywords

ACOUSTIC EMISSIONQ2

DELAMINATION MONITORINGQ1

FML PATCHQ1

SIGNAL FREQUENCY ANALYSISQ1

Abstract

In this paper, ACOUSTIC EMISSION monitoring of repaired aluminum 2024-T3 sheet with FML PATCH is studied. For the experimental investigation, 12 samples were made and classified into 4 categories according to the crack angle (zero and 45 degrees), and repaired or unrepaired state. To reduce manufacturing errors, composite prepreg is used for producing patches, aluminum surfaces are anodized and curing is done in an autoclave. In fatigue crack initiation process, using ACOUSTIC EMISSION data acquisition crack initiation moment is detected. Onset of delamination, delamination advancement and critical delamination growth rate are identified using ACOUSTIC EMISSION signal cumulative energy parameter. SEM image and investigation of failure surface are used for detecting failure mechanism. By introducing one frequency analysis method we tried to classify frequency range of failure mechanism signals. Because of frequency range intersection of matrix cracking, fiber/matrix separation and delamination of patch from aluminum sheet, force-displacement curve is divided to 3 zones and frequency analysis is done in each zone where probability of certain failure mechanism is higher than the others. Aluminum plastic deformation and crack growth occur in a same frequency range 440-480 kHz while, delamination happens in 100-150 kHz and 200-220 kHz frequency ranges.

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APA: Copy

AHMADI NAJAFABADI, MORTEZA, HOSSEINI TOUDESHKI, H., & SEDIGHI, MOJTABA. (2016). DAMAGE MONITORING OF ALUMINUM SHEET REPAIRED WITH FIBER METAL LAMINATE PATCH BY ACOUSTIC EMISSION. MODARES MECHANICAL ENGINEERING, 16(2), 1-9. SID. https://sid.ir/paper/178820/en

Vancouver: Copy

AHMADI NAJAFABADI MORTEZA, HOSSEINI TOUDESHKI H., SEDIGHI MOJTABA. DAMAGE MONITORING OF ALUMINUM SHEET REPAIRED WITH FIBER METAL LAMINATE PATCH BY ACOUSTIC EMISSION. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(2):1-9. Available from: https://sid.ir/paper/178820/en

IEEE: Copy

MORTEZA AHMADI NAJAFABADI, H. HOSSEINI TOUDESHKI, and MOJTABA SEDIGHI, “DAMAGE MONITORING OF ALUMINUM SHEET REPAIRED WITH FIBER METAL LAMINATE PATCH BY ACOUSTIC EMISSION,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 2, pp. 1–9, 2016, [Online]. Available: https://sid.ir/paper/178820/en

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