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Interfacial evaluation and microfailure mechanisms of single carbon fiber/bismaleimide (BMI) composites by tensile and compressive fragmentation tests and acoustic emission by Joung-Man Park; Jin-Won Kim; Dong-Jin Yoon is a Engineering article available to read on EtoBox.

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Interfacial properties and microfailure modes of carbon, SiC, and glass fibers/bismaleimide (BMI) composites were evaluated using both tensile fragmentation and compressive Broutman tests with acoustic emission (AE). Since brittle BMI is a difficult matrix to apply for the conventional fragmentation test, dual matrix composites (DMC) were applied due to their too brittleness and high modulus. By curing further from two-to three-stage, the interfacial shear strength (IFSS) between the fiber and the BMI matrix increased under both tension and compression, whereas the number of the vertical crack spacings of the BMI matrix decreased under tension. It was considered that the IFSS increased due to further progressed curing at the three-stage. The typical microfailure modes including fiber break, matrix crack, and interfacial failure were observed in tension. Due to transverse tensile stress at the interface in compression, many overlapped diagonal slippages were observed only at the broken carbon fiber ends without a BMI vertical crack. In tension, SiC and glass fibers were never broken due to their rather longer elongation to failure than carbon fiber. AE amplitudes of the brittle BMI

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Author

Joung-Man Park; Jin-Won Kim; Dong-Jin Yoon

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0266-3538)

Published

2002

Language

EN

Field

Engineering (Physical Sciences)