In Situ X-Ray Monitoring of Damage Accumulation in SiC/RBSN Tensile Specimens

Baaklini, George Y.; Bhatt, Ramesh S.

doi:10.1002/9780470313831.ch50

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…This was evident from radiographs taken during the test (Fig. 15 and Baaklini and Bhatt, 1991). This transition region corresponds to stress levels between 200 and 270 MPa in Fig. 14.…”

Section: Noncatastrophic Failure Mechanismsmentioning

confidence: 69%

Mechanical Behavior of Fiber Reinforced SiC/RBSN Ceramic Matrix Composites: Theory and Experiment

Chulya

Gyekenyesi

Bhatt

1991

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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The mechanical behavior of continuous fiber reinforced SiC/RBSN composites with various fiber contents is evaluated. Both catastrophic and noncatastrophic failures are observed in tensile specimens. Damage and failure mechanisms are identified via in-situ monitoring using NDE techniques throughout the loading history. Effects of fiber/matrix interface debonding (splitting) parallel to the fibers are discussed. Statistical failure behavior of fibers is also observed, especially when the interface is weak. Micromechanical models incorporating residual stresses to calculate the critical matrix cracking strength, ultimate strength and work of pull-out are reviewed and used to predict composite response. For selected test problems, experimental measurements are compared to analytical predictions.

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“…This was evident from radiographs taken during the test (Fig. 15 and Baaklini and Bhatt, 1991). This transition region corresponds to stress levels between 200 and 270 MPa in Fig. 14.…”

Section: Noncatastrophic Failure Mechanismsmentioning

confidence: 69%

Mechanical Behavior of Fiber Reinforced SiC/RBSN Ceramic Matrix Composites: Theory and Experiment

Chulya

Gyekenyesi

Bhatt

1991

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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show abstract

“…7 In situ X-ray monitoring of the time-dependent behavior of ceramics also was studied via the X-ray TV method. 8 However, the X-ray TV system revealed rather low spatial resolution and poor contrast resolution, and, thus far, the conventional TV method has not been considered to be suitable for the inspection of fine ceramics. Thus, a new method that has high speed and high detectability needs to be developed.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Sensitive Radioscopy for Fine Ceramics Using an Image‐Subtraction Method

Ikeda

Mizuta

Onda

1999

Journal of the American Ceramic Society

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A new microfocus X‐ray testing method has been developed to detect very small defects in ceramic products with high speed and reliability. By using image subtraction, enhanced X‐ray images of defects were extracted from the background noise. Much‐better sensitivity (e.g., 0.1% in Si3N4 that was 20 mm thick) was obtained within a few minutes. This method is considerably superior to the conventional film method. In this study, Si3N4 test pieces (penetrameters) that had very small artificial defects (such as slits and pores) were prepared and examined by using the new method.

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Optical Instrumentation and Nondestructive Evaluation Branch Research and Technology Advances at NASA Glenn Research Center since 1941

Baaklini

2013

J. Aerosp. Eng.

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In Situ X-Ray Monitoring of Damage Accumulation in SiC/RBSN Tensile Specimens

Cited by 4 publications

References 2 publications

Mechanical Behavior of Fiber Reinforced SiC/RBSN Ceramic Matrix Composites: Theory and Experiment

Mechanical Behavior of Fiber Reinforced SiC/RBSN Ceramic Matrix Composites: Theory and Experiment

Rapid and Sensitive Radioscopy for Fine Ceramics Using an Image‐Subtraction Method

Optical Instrumentation and Nondestructive Evaluation Branch Research and Technology Advances at NASA Glenn Research Center since 1941

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