Unsupervised acoustic emission data clustering for the analysis of damage mechanisms in glass/polyester composites

Oskouei, Amir Refahi; Heidary, Hossein; Ahmadi, Mehdi; Farajpur, Mehdi

doi:10.1016/j.matdes.2012.01.018

Cited by 73 publications

(20 citation statements)

References 28 publications

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“…In contrast, tensile loading on GFR-EP causes various acoustic emissions. The detected signals in Figure 8c1 show a frequency spectrum up to 200 kHz, which indicates matrix cracking [23]. Instead, after matrix crack growth, in Figure 8c2, delamination and fiber-matrix debonding occur, represented by frequency spectrums between 200 and 350 kHz [23], followed by fiber fracture (see Figure 8c3).…”

Section: Resultsmentioning

confidence: 98%

“…The detected signals in Figure 8c1 show a frequency spectrum up to 200 kHz, which indicates matrix cracking [23]. Instead, after matrix crack growth, in Figure 8c2, delamination and fiber-matrix debonding occur, represented by frequency spectrums between 200 and 350 kHz [23], followed by fiber fracture (see Figure 8c3). This stepwise increase of internal damage state in GFR-EP can be a reason for the stiffness degrada- tion in tensile tests after approximately 0.7 × 10 -2 total strain.…”

Section: Resultsmentioning

confidence: 98%

“…Figure 8c exemplarily shows the results of HFIM. HFIM is based on acoustic emissions, which represent the transient energy spontaneously released by damage occurring, e. g., delamination or fiber fracture [23]. The detected acoustic emissions are displayed in a process landscape after fast fourier transformation (FFT).…”

Section: Resultsmentioning

confidence: 99%

“…The energy amplitude (z-axis) is plotted time discrete (x-axis) as a function of frequency (y-axis). In addition, each damage mechanism leads to unique characteristics, which can be separated by energy amplitude and frequency spectrum [23]. However, it can be seen that tensile loading on GFR-PU does not result in relevant acoustic emissions until fracture (see Figure 8c), which represents a high layer quality and great fiber-matrix interface.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Comparative characterization of quasi-static and cyclic deformation behavior of glass fiber-reinforced polyurethane (GFR-PU) and epoxy (GFR-EP)

Huelsbusch¹,

Jamrozy²,

Frieling³

et al. 2017

Materials Testing

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123 Production-and microstructure-based fatigue assessment of metallic AISI 304/430 multilayer materials produced by hot pack rolling B. Mitevski, S. Weiß and A. Fischer 130 In-situ tensile testing of notched poly-and oligocrystalline 316L wires 136 Effect of processing conditions on the structure, electrical and mechanical properties of melt mixed high density polyethylene/multi-walled CNT composites in compression molding S. Gach, A. Schwedt, S. Olschok, U. Reisgen and J. Mayer 148 Confirmation of tensile residual stress reduction in electron beam welding using low transformation temperature materials (LTT) as localized metallurgical injection-Part 1: Metallographic analysis T. Srinivasa Rao, G. Madhusudhan Reddy and S. R. Koteswara Rao 155 Investigation on variations in hardness and microstructure of in-process cooled 7075 aluminum alloy friction stir welds M. Farajian, V. Hardenacke, W. Pfeiffer, M. Klaus and J. R. Kornmeier 161 Numerical and experimental investigations on shot-peened high-strength steel by means of hole drilling, X-ray, synchrotron and neutron diffraction analysis G. Sun and Z. Zhou 166 Ultrasonic imaging of particle distribution in SiCp/Al composites 183 Finite element analysis of a vibration test bed frame J. Gülen and M. İskeçeli 188 Removal of methylene blue by using porous carbon adsorbent prepared from carbonized chestnut shell

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Comparative characterization of quasi-static and cyclic deformation behavior of glass fiber-reinforced polyurethane (GFR-PU) and epoxy (GFR-EP)

Huelsbusch¹,

Jamrozy²,

Frieling³

et al. 2017

Materials Testing

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“…To detect mechanical damage in highly responsible and heavily loaded structures, fundamentally different monitoring tools are needed to ensure maximum controlled coverage, which is relevant for extended PCM structures (airframe, rotor blades). One of the variants of such monitoring tools is the acoustic emission control method in conjunction with the measurement of deformations in structures [5,6].…”

Section: Introductionmentioning

confidence: 99%

Creation of an Integrated System for Monitoring the Technical Condition of High-Quality Helicopter Units based on Fiber-Optic Technology

Lvov¹,

Khabarov²,

Gavrikov³

2018

IJET

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This article discusses the problems of creating an integrated system for monitoring the technical condition of highly responsible helicopter units, and analyzed options for its creation. Fiber-optical technology is considered as a technology, on the basis of which it is possible to build an integrated system, since this technology makes it possible to measure various physical parameters such as vibration, deformation, temperature, acoustic emission and other parameters, and due to the miniature dimensions of the fiber-optic light guide. It can be built into the PCM design, which is a relevant factor due to the growth use of PCM in the design and manufacture of helicopters. The results of bench and flight tests of helicopter pilot and rotor blades with fasteners using fiber optic deformation sensors based on a Bragg fiber grille demonstrate the fundamental possibility of creating a system for monitoring the technical condition of helicopter rotors using fiber optic sensors .Also, there are examples of creating other elements of an integrated monitoring system based on the use of fiber-optic technology, such as a system for signaling the breakdown of air flow and flutter on the helicopter rotor blades, a system for measuring the weight and alignment of helicopter cargo and a system for monitoring the technical condition of the airframe.

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Bibliography

2018

Acoustic Emission and Durability of Composite Materials

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Unsupervised acoustic emission data clustering for the analysis of damage mechanisms in glass/polyester composites

Cited by 73 publications

References 28 publications

Comparative characterization of quasi-static and cyclic deformation behavior of glass fiber-reinforced polyurethane (GFR-PU) and epoxy (GFR-EP)

Comparative characterization of quasi-static and cyclic deformation behavior of glass fiber-reinforced polyurethane (GFR-PU) and epoxy (GFR-EP)

Creation of an Integrated System for Monitoring the Technical Condition of High-Quality Helicopter Units based on Fiber-Optic Technology

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