Monitoring tensile damage evolution in Nextel 312/Blackglas™ composites

Kim, Jeongguk; Liaw, Peter K.

doi:10.1016/j.msea.2005.07.061

Cited by 18 publications

(12 citation statements)

References 16 publications

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“…Various forms of nondestructive evaluation (NDE) techniques are applied to aid this research [9,10]. Techniques such as acoustic emission, high-speed infrared camera (Infrared Thermography), and ultrasonic testing are commonly used, and acoustic emission and high-speed infrared camera are useful for monitoring various signals generated from specimens during mechanical testing [11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Tensile Fracture Behavior and Characterization of Ceramic Matrix Composites

Kim

2019

Materials

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Tensile fracture behavior of ceramic matrix composites (CMCs) was investigated using characterization tools. First, a high-speed infrared camera was used to monitor the surface temperature of the CMC specimen during mechanical testing. An infrared camera is a tool used to detect infrared (IR) radiation emitted from a specimen as a function of temperature, and it was used to analyze the temperature monitoring of specimen surface and fracture behavior during the tensile test. After the test, the microstructural analysis using SEM was performed. SEM analysis was performed to investigate the fracture mode and fracture mechanism of CMC materials. In this paper, it was found that the results of the surface temperature monitoring obtained from IR thermal imaging technology and the failure mode analysis obtained through SEM were in a good agreement. These techniques were useful tools to explain the mechanical behavior of ceramic matrix composites. The detailed experiments and testing results will be provided.

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Section: Introductionmentioning

confidence: 99%

Tensile Fracture Behavior and Characterization of Ceramic Matrix Composites

Kim

2019

Materials

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“…[19][20][21] However, still no crack growth measurements are available for composites of ceramic, polymeric, or metallic matrices using NDE. IRT and AE were combined to measure thermal energy dissipation of some CMCs 22,23 as well as to monitor damage evolution in an alumina-boriasilica fiber-reinforced CMC under tension 24 and in a 2D carbon-fiber/SiC CMC under fatigue loading 25 ; the results did not include crack growth data.…”

Section: Introductionmentioning

confidence: 99%

Crack Growth Monitoring in Ceramic Matrix Composites by Combined Infrared Thermography and Acoustic Emission

et al. 2013

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The current study proposes a novel methodology for measuring crack growth in composite materials using combined infrared thermography (IRT) and acoustic emission (AE). The technique is tested across a SiC‐fiber‐reinforced ceramic matrix composite while no apparent factor is limiting its usage on composite materials of different nature as well. Compact tension specimens were loaded in tension with unloading/reloading loops and the thermally dissipated energy due to crack growth and other damage mechanisms was captured by IRT with a 100 Hz sampling rate. Crack growth was established by identifying the time instances where the maximum temperature, hence also damage, occurred and then quantifying, by means of control lines, the damage span within the thermograph corresponding to the specific instance. The high accuracy of the proposed technique was validated against optical measurements of crack length. The theoretical crack length predicted by the elastic compliance technique was found to overestimate the experimental findings by at least 25%. Knowledge of the critical level of damage accumulation for material structural health was made possible from AE descriptors such as activity during the unloading part of the cycles. In this study, AE was particularly successful in closely following the actual crack growth measured by IRT, an observation that brings out the potential of the technique for quantitative measurements.

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“…[2] One of the major advantages of CFCCs is that these materials fail in a noncatastrophic manner. [1][2][3][4][5][6][7][8][9] The toughening mechanisms in CMCs depend upon a number of microstructural parameters affected by the fiber, matrix, and interface properties. Due to the embedment of reinforcements, CMCs prevent catastrophic rupture with some energy dissipation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Tensile Fracture Behavior of Nicalon/SiC Composites

Kim

Liaw

2007

Metall Mater Trans A

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The tensile behavior of Nicalon fiber-reinforced silicon carbide matrix composites (Nicalon/SiC) was investigated with the aid of nondestructive evaluation (NDE) techniques. The NDE techniques include ultrasonic testing (UT), X-ray computed tomography (CT), and infrared (IR) thermography. Before mechanical testing, UT C-scans were developed to investigate defect distributions and to detect variations in the internal flaws. X-ray CT was used to characterize the type of defects and the location of flaws in composites to compare with UT C-scan results. The IR thermography was employed to monitor temperature evolution during tensile testing. This article also investigated the feasibility of using multiple NDE techniques as a means of assessing integrity for Nicalon/SiC composites. Microstructural characterization was performed using scanning electron microscopy (SEM) to investigate failure mechanisms of Nicalon/SiC composites, and the results were compared with NDE data.

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Monitoring tensile damage evolution in Nextel 312/Blackglas™ composites

Cited by 18 publications

References 16 publications

Tensile Fracture Behavior and Characterization of Ceramic Matrix Composites

Tensile Fracture Behavior and Characterization of Ceramic Matrix Composites

Crack Growth Monitoring in Ceramic Matrix Composites by Combined Infrared Thermography and Acoustic Emission

Tensile Fracture Behavior of Nicalon/SiC Composites

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