AE-BASED DAMAGE INVESTIGATION IN UNIDIRECTIONAL COMPOSITE LAMINATES UNDER LOW-VELOCITY IMPACT TESTS

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GHAYOOMI MOHAMMADI MOHAMMAD; MAHDIAN AHI ALI; YOUSEFI JALAL; AHMADI NAJAFABADI MEHDI

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Journal: Modares Mechanical Engineering Year:2017 | Volume:17 | Issue:7 Page(s): 91-100

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Title

AE-BASED DAMAGE INVESTIGATION IN UNIDIRECTIONAL COMPOSITE LAMINATES UNDER LOW-VELOCITY IMPACT TESTS

Author(s)

GHAYOOMI MOHAMMADI MOHAMMAD | MAHDIAN AHI ALI | YOUSEFI JALAL | AHMADI NAJAFABADI MEHDI | Issue Writer Certificate

Keywords

DAMAGE MECHANISMQ1

ACOUSTIC EMISSIONQ1

LOW VELOCITY IMPACTQ1

WAVELET TRANSFORMQ2

ULTRASONIC C-SCANQ1

Abstract

One of the main issues associated with application of laminated composites in industrial applications is their brittle-type behavior under impact loading. The LOW VELOCITY IMPACT may lead to crucial internal damages that are not detectable by visual inspection and can significantly reduce the strength of laminated composites. The main purpose of this research is to characterize the DAMAGE MECHANISMs in laminated composites under LOW VELOCITY IMPACT tests. For this purpose, a quasi-static test was first utilized out to achieve initial information about impact tests. LOW VELOCITY IMPACT tests were then employed for unidirectional glass/epoxy composite specimens, and ACOUSTIC EMISSION (AE) signals were acquired during impact events. Next, AE signals were examined using wavelet approach to discriminate released energy related to each distinct DAMAGE MECHANISM. Besides, a method was obtained to estimate threshold impact energy from the quasi-static test, beyond which damage meaningfully extends. The AE based approach using WAVELET TRANSFORM methodology was suggested to forecast the total damage area. It was determined that this AE method can be a reliable approach in damage evaluation under impact loads in composite structures.

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APA: Copy

GHAYOOMI MOHAMMADI, MOHAMMAD, MAHDIAN AHI, ALI, YOUSEFI, JALAL, & AHMADI NAJAFABADI, MEHDI. (2017). AE-BASED DAMAGE INVESTIGATION IN UNIDIRECTIONAL COMPOSITE LAMINATES UNDER LOW-VELOCITY IMPACT TESTS. MODARES MECHANICAL ENGINEERING, 17(7 ), 91-100. SID. https://sid.ir/paper/179328/en

Vancouver: Copy

GHAYOOMI MOHAMMADI MOHAMMAD, MAHDIAN AHI ALI, YOUSEFI JALAL, AHMADI NAJAFABADI MEHDI. AE-BASED DAMAGE INVESTIGATION IN UNIDIRECTIONAL COMPOSITE LAMINATES UNDER LOW-VELOCITY IMPACT TESTS. MODARES MECHANICAL ENGINEERING[Internet]. 2017;17(7 ):91-100. Available from: https://sid.ir/paper/179328/en

IEEE: Copy

MOHAMMAD GHAYOOMI MOHAMMADI, ALI MAHDIAN AHI, JALAL YOUSEFI, and MEHDI AHMADI NAJAFABADI, “AE-BASED DAMAGE INVESTIGATION IN UNIDIRECTIONAL COMPOSITE LAMINATES UNDER LOW-VELOCITY IMPACT TESTS,” MODARES MECHANICAL ENGINEERING, vol. 17, no. 7 , pp. 91–100, 2017, [Online]. Available: https://sid.ir/paper/179328/en

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